NZXT’s Kraken Z63 and X73 sit in the premium end of the AIO liquid cooler market, but they appeal to slightly different builders. The Kraken Z63 is a 280mm cooler built around strong performance and a customizable LCD pump display, while the Kraken X73 uses a larger 360mm radiator to prioritize thermal headroom for high-core-count CPUs and sustained heavy workloads.
Both coolers share NZXT’s clean industrial design, CAM software integration, and familiar Kraken installation experience, yet their strengths are not identical. The Z63 is the showpiece option for builds where aesthetics and monitoring matter as much as temperatures, while the X73 is the more straightforward performance-focused choice for cases that can accommodate a 360mm radiator.
| # | Preview | Product | Price | |
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NZXT Kraken Elite 360 RGB - 360mm AIO CPU Cooler, LCD - White | $291.99 | Buy on Amazon |
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NZXT Kraken Plus 240-240mm AIO CPU Cooler, LCD - Black | $119.99 | Buy on Amazon |
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NZXT Kraken Plus 360-360mm AIO CPU Cooler, LCD - Black | $175.99 | Buy on Amazon |
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This review compares the NZXT Kraken Z63 and X73 across design, setup, cooling performance, acoustics, software features, and overall value to help determine which model makes more sense for gaming PCs, workstation builds, and showcase systems.
Design, Radiator Sizes, and Key Specifications
The NZXT Kraken Z63 and Kraken X73 share the same core design language: a clean black radiator, sleeved low-permeation rubber tubing, a circular pump cap, and a generally understated look that fits well in minimalist builds. The big visual difference is on the pump housing. The Kraken Z63 uses NZXT’s 2.36-inch LCD screen, allowing system stats, custom images, and animated GIFs to be displayed directly on the block. The Kraken X73 keeps the more traditional infinity-mirror RGB pump cap, which still looks distinctive but is less customizable and less functional than the Z63’s display.
#1 Best Overall
- SUPERIOR COOLING: The custom-designed NZXT Turbine pump efficiently cools even the most heat-prone CPUs with its high flow rate and head pressure, resulting in a 10%* performance boost with less noise.
- BIGGER, BOLDER DISPLAY: Enjoy stunning visuals on the large 2.72-inch IPS LCD featuring crisp 640 x 640 resolution, smooth 60 Hz refresh rate, ultra-bright 690 cd/m² backlight, vibrant 24-bit color, and wide viewing angles.
- MORE PERSONAL THAN EVER: Display your favorite GIF or image, monitor real-time system performance, and integrate with Google Photos, Spotify, and YouTube. Sync the RGB LED ring with on-screen content and other RGB devices for a cohesive look.
- SIMPLE INSTALLATION: Get set up quickly with pre-applied thermal paste, a single breakout cable, and tool-free mounting brackets for the latest AMD (AM5, AM4) and Intel (LGA 1851/1700, 1200/115X) CPU sockets.
- VIBRANTLY COOL: The RGB Core single-frame fan on the radiator provides optimal airflow and vibrant lighting, along with a sleek, integrated design for easy connectivity and control.
Radiator size is the practical difference that affects case compatibility and cooling headroom. The Z63 is a 280mm AIO, using two 140mm fans, while the X73 is a 360mm AIO, using three 120mm fans. In many modern mid-tower and full-tower cases, a 360mm radiator can mount at the front or top, but clearance is not guaranteed, especially with tall memory modules, thick motherboard heatsinks, or compact top panels. A 280mm radiator is often easier to fit at the top of cases that support dual 140mm fans, though it still requires checking width and motherboard clearance.
| Model | Radiator Class | Fan Layout | Pump Cap Feature | Best Fit |
|---|---|---|---|---|
| NZXT Kraken Z63 | 280mm | 2 x 140mm | 2.36-inch customizable LCD | High-end builds where aesthetics and display features matter |
| NZXT Kraken X73 | 360mm | 3 x 120mm | Infinity-mirror RGB lighting | Performance-focused builds with room for a 360mm radiator |
The included fans also shape the experience. The Z63’s dual 140mm setup can move a lot of air at lower rotational speeds, which can help keep noise smoother under moderate loads. The X73’s three 120mm fans spread airflow across a longer radiator, giving it strong heat dissipation potential when the CPU is pushed hard. Both models use NZXT’s Aer P radiator fans, designed for static pressure rather than open-air case airflow, making them better suited to forcing air through dense radiator fins.
Build quality is consistent across both coolers. The radiators feel rigid, the tubing is neatly sleeved, and the pump assemblies have the polished presentation expected from NZXT’s premium Kraken line. The tubing exits the pump through rotatable fittings, which helps with routing whether the radiator is mounted at the top, front, or side of the chassis. Neither cooler is small, so buyers should verify radiator length, thickness, fan clearance, and tube reach before purchasing. In short, the Z63 prioritizes premium presentation and a useful LCD feature in a more compact 280mm format, while the X73 prioritizes maximum radiator surface area for users who can accommodate a 360mm unit.
The Tool Desk
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Installing the NZXT Kraken Z63 and X73 is a straightforward process if your case has the right radiator clearance. Both coolers use NZXT’s familiar Asetek-style mounting system, with a circular pump block, interchangeable mounting hardware, and a separate breakout cable for power and control. The main difference during installation is not the pump hardware but the radiator size: the Z63 uses a 280mm radiator with two 140mm fans, while the X73 uses a longer 360mm radiator with three 120mm fans.
For most builders, the Z63 is the easier of the two to fit. A 280mm radiator commonly mounts in the front of mid-tower cases and in the top of many larger cases, although top clearance can become tight when tall motherboard VRM heatsinks or high-profile memory are involved. The X73 requires a full 360mm mounting location, usually at the front or top of a larger mid-tower or full-tower chassis. Before buying either cooler, it is worth checking not only the listed radiator support but also the thickness available once fans are installed, since the radiator and fan stack needs enough room to avoid colliding with the motherboard, EPS cables, or front-panel cabling.
Mounting hardware and socket support
Socket compatibility is broad across both models. The Kraken Z63 and X73 support modern Intel and AMD desktop platforms, including common Intel LGA sockets and AMD AM4/AM5 systems, though exact bracket contents can vary by production date and region. On AMD boards, installation typically reuses the stock motherboard backplate, which keeps the process simple. On Intel systems, NZXT’s included backplate and standoffs are used to secure the pump block with even pressure across the CPU heat spreader.
- Intel installation: Fit the rear backplate, install the correct standoffs, position the pump block, then tighten the thumbscrews in a cross pattern.
- AMD installation: Remove the plastic retention brackets, keep the factory backplate in place, install the AMD standoffs, and secure the pump using the supplied mounting ring.
- Radiator mounting: The Z63 needs two 140mm fan positions; the X73 needs three 120mm fan positions.
- Cable requirements: Both require internal USB 2.0 connectivity for CAM control, plus SATA power from the power supply.
The pump cap is easy to orient after mounting, which helps keep the NZXT logo or Z63 display aligned properly regardless of whether the tubes exit toward the RAM, rear exhaust, or top of the board. Tube length is generally generous enough for front or top radiator placement in standard ATX cases, but the X73’s longer radiator can make tube routing slightly more sensitive in compact layouts. Builders using a front-mounted radiator should also consider hose position carefully to reduce trapped air reaching the pump over time.
The extra installation step on the Z63 is related to its LCD display. Along with the usual pump and fan wiring, the display relies on NZXT CAM through an internal USB connection, so clean cable management matters if you want the build to look as polished as the cooler itself. The X73 has fewer visual-display considerations, but the third fan adds another cable and more radiator screws. In practice, the Z63 feels more premium and slightly more involved because of the screen, while the X73 feels larger and more space-dependent. Neither is difficult for an experienced builder, but the Z63 is the safer choice for case compatibility, and the X73 is best reserved for cases with confirmed 360mm radiator support.
Cooling Performance Under Real-World Loads
In day-to-day use, both the NZXT Kraken Z63 and X73 deliver the kind of thermal performance expected from upper-tier AIO liquid coolers, but they do it with slightly different strengths. The Z63 uses a 280mm radiator with two 140mm fans, while the X73 uses a larger 360mm radiator with three 120mm fans. That extra surface area gives the X73 more cooling headroom, especially on CPUs that sustain high package power for long periods, but the Z63 remains highly capable for gaming, mixed workloads, and many enthusiast desktop builds.
With modern mid-range and high-end processors, gaming loads are rarely the hardest test for either cooler. In a typical gaming session, CPU utilization tends to fluctuate, and the heat load is often lower than in all-core rendering or stress testing. Under those conditions, the Kraken Z63 is already enough to keep temperatures well controlled on chips such as a Ryzen 7, Ryzen 9 in gaming-focused use, or Intel Core i5/Core i7 parts running at stock or lightly tuned settings. The X73 does not always produce a dramatic gaming temperature advantage, but it can maintain similar temperatures with more radiator capacity in reserve.
The difference becomes easier to see in sustained multi-threaded workloads. Tasks such as Blender rendering, HandBrake encoding, Cinebench loops, code compilation, and long photo or video exports keep the processor loaded for minutes or hours rather than seconds. Here, the X73’s 360mm radiator has a clear advantage. Its larger heat exchanger can dissipate more energy over time, which helps reduce peak temperatures and can delay or prevent thermal throttling on power-hungry CPUs. Users running an unlocked Core i7 or Core i9, Ryzen 9 7900X/7950X-class CPU, or a similarly demanding processor will get more practical benefit from the X73 than someone primarily gaming.
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Rank #2
- HIGH-PERFORMANCE COOLING — The NZXT Turbine pump is engineered for high flow and head pressure, delivering efficient, low-noise cooling to keep your CPU performing at its best under heavy workloads.
- CUSTOM LCD SCREEN — Display real-time system temps, animated GIFs, custom images, or web integrations like Spotify and YouTube on a bright 1.54" square LCD — fully customizable through NZXT CAM software.
- QUIET AIRFLOW — High-static pressure fans move air through the radiator to dissipate heat effectively, while Zero RPM Mode stops the fans completely at low loads for silent operation.
- EASY INSTALLATION — Pre-applied thermal paste and a single breakout cable from the pump cap speed up installation and reduce cable clutter.
- WIDE COMPATIBILITY — Includes tool-free mounting brackets that support the latest AMD and Intel CPU sockets, including AM5 and LGA 1851.
Performance differences in practice
| Scenario | Kraken Z63 | Kraken X73 |
|---|---|---|
| Gaming and everyday use | Excellent; usually more than enough for high-end gaming CPUs | Excellent; similar perceived performance with extra capacity |
| Sustained rendering or encoding | Strong, but may run warmer on very high-wattage CPUs | Better suited to long all-core workloads |
| Overclocking or raised power limits | Good for moderate tuning | Stronger choice for aggressive CPU power targets |
| Small thermal spikes | Handles bursts well | Handles bursts well with more radiator mass |
Case airflow still matters. A front-mounted radiator can feed the cooler with fresh air and lower CPU temperatures, but it may raise GPU temperatures because warmer air enters the chassis. A top-mounted radiator usually works better for overall system balance, though CPU temperatures may be a few degrees higher. The X73 also needs a case with proper 360mm support and enough clearance around the motherboard, memory, and top panel. If airflow is restricted, the advantage of the larger radiator can shrink.
For most gaming systems and balanced productivity PCs, the Kraken Z63 provides excellent real-world cooling with the added appeal of its LCD-equipped pump head. For users who regularly push high-core-count processors under sustained loads, the Kraken X73 is the more performance-focused option. Its main benefit is not that it transforms light workloads, but that it gives demanding CPUs more thermal room when the system is working hard for extended periods.
Noise Levels, Fan Behavior, and Pump Acoustics
Acoustics are where the NZXT Kraken Z63 and X73 start to feel different in daily use, despite sharing the same general pump platform and NZXT CAM control environment. The Z63 uses two 140mm fans on a 280mm radiator, while the X73 uses three 120mm fans on a 360mm radiator. That changes the character of the noise more than the raw volume alone: the Z63 tends to produce a lower-pitched airflow sound, while the X73 has a slightly higher-pitched fan signature because of its smaller fans and extra fan motor.
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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteAt idle and during light desktop work, both coolers can be made very quiet with a conservative fan curve. In a well-ventilated case, the fans often sit at low RPM and the pump becomes the more noticeable component if the system is otherwise silent. The Z63’s 140mm fans have an advantage here because they can move a useful amount of air at lower speeds, making it easier to tune for a subdued acoustic profile. The X73 can also be quiet, but with three fans spinning, slight tonal differences between fan motors are more likely to be noticed in a very quiet room.
Under sustained CPU loads, the X73’s larger 360mm radiator gives it more surface area to dissipate heat, so it usually does not need to ramp its fans as aggressively to hold similar temperatures on high-power CPUs. This gives it an acoustic advantage in demanding workloads such as long renders, heavy code compilation, or extended gaming sessions with a hot processor. The Z63 remains capable, but when paired with power-hungry CPUs and warmer ambient temperatures, its two-fan setup may need higher RPM to keep pace, which makes the airflow more prominent.
Fan behavior in practice
- Kraken Z63: smoother low-RPM behavior, deeper airflow tone, and strong quiet-performance balance for gaming and everyday high-end builds.
- Kraken X73: better thermal headroom at moderate fan speeds, especially with CPUs that sustain high package power for long periods.
- Case airflow matters: restricted front panels can force both units to run louder, while mesh-front cases let the fans stay calmer.
- Curve tuning matters: linking fan speed to liquid temperature instead of instant CPU temperature helps prevent constant ramping and sudden noise spikes.
The pump on both models is generally controlled well, but it is not completely silent. At lower pump settings, it blends into the background in most builds; at higher settings, users may hear a faint hum or whir, especially if the case sits on a desk near ear level. The LCD-equipped Z63 does not inherently make more cooling noise because of its display, but the screen encourages the pump head to be more visually exposed, so users may also become more aware of any pump tone. Mounting the radiator correctly, with the pump not sitting at the highest point in the loop, also helps avoid gurgling or trapped-air noise over time.
For buyers prioritizing the quietest gaming setup, the Z63 is often the more pleasant choice if the CPU is not constantly running at extreme sustained power levels. Its 140mm fans deliver a fuller, less sharp acoustic profile and the 280mm format fits many cases cleanly. For workstation users, overclockers, or anyone running a top-tier CPU under long all-core workloads, the X73 is easier to recommend because its 360mm radiator can maintain strong cooling without relying on excessive fan speed. Neither cooler is loud when tuned properly, but the Z63 favors acoustic character and simplicity, while the X73 favors thermal capacity with controlled noise under heavier loads.
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NZXT CAM Software, RGB Control, and LCD Features
NZXT CAM is central to the experience with both the Kraken Z63 and Kraken X73, but the two coolers use it in noticeably different ways. On the X73, CAM is primarily used for monitoring temperatures, adjusting pump behavior, setting fan curves if the fans are connected through supported NZXT hardware, and controlling the RGB lighting on the pump cap. On the Z63, CAM adds the headline feature: the 2.36-inch LCD screen embedded in the pump housing. That display is the biggest functional and visual separator between the two models, and it changes the cooler from a purely performance-focused component into a showpiece for a windowed build.
The monitoring side of CAM is straightforward. It displays CPU temperature, GPU temperature, clock speeds, load, liquid temperature, and fan or pump speeds in a clean dashboard. For daily use, the most useful controls are the preset performance profiles and the ability to create custom curves based on CPU or liquid temperature. Liquid temperature-based curves are especially useful for AIO coolers because they avoid sudden fan ramping during brief CPU spikes. Instead of fans jumping aggressively every time the processor boosts for a few seconds, the curve responds to the coolant’s slower temperature changes, producing smoother acoustics.
RGB and pump customization
The Kraken X73 uses NZXT’s infinity mirror-style pump top with RGB lighting, giving it a clean and recognizable look without a screen. CAM allows color selection, brightness control, animation effects, and synchronization with compatible NZXT RGB devices. It is effective if your build already uses NZXT fans, lighting strips, or an H-series case ecosystem, though users with mixed-brand RGB hardware may find themselves juggling more than one software suite. The X73’s lighting is attractive, but it remains mostly decorative; it does not add the real-time information or personalization depth of the Z63.
The Kraken Z63’s LCD is far more flexible. Through CAM, the screen can show CPU temperature, GPU temperature, liquid temperature, clock speeds, animated GIFs, static images, or a rotating dual-infographic view. This makes the Z63 particularly appealing for builders who care about the internal presentation of the system. A temperature readout on the pump block is genuinely useful during gaming, rendering, or stress testing, and a custom GIF can turn the cooler into a centerpiece. The display is bright, sharp enough for the size, and easy to read through tempered glass, provided the case interior has decent visibility.
Software strengths and limitations
- Best CAM feature for both coolers: custom pump and fan curves, especially when based on liquid temperature.
- Best Z63-exclusive feature: the LCD display with system metrics, images, and GIF support.
- Best X73 software feature: simple RGB control for the pump cap without the extra cost of an LCD.
- Main drawback: CAM must be installed and running for the full customization experience, particularly on the Z63.
In practical terms, CAM is polished enough for most users, but it is still another background application. Builders who prefer BIOS-only control and minimal software may see this as a downside, especially if they only need basic cooling performance. For the Z63, however, CAM is part of the product’s value because the LCD depends on it for customization. For the X73, CAM feels less essential once the pump and lighting are configured, unless the system relies on NZXT’s ecosystem for broader fan and RGB control.
Rank #3
- HIGH-PERFORMANCE COOLING — The NZXT Turbine pump is engineered for high flow and head pressure, delivering efficient, low-noise cooling to keep your CPU performing at its best under heavy workloads.
- CUSTOM LCD SCREEN — Display real-time system temps, animated GIFs, custom images, or web integrations like Spotify and YouTube on a bright 1.54" square LCD — fully customizable through NZXT CAM software.
- QUIET AIRFLOW — High-static pressure fans move air through the radiator to dissipate heat effectively, while Zero RPM Mode stops the fans completely at low loads for silent operation.
- EASY INSTALLATION — Pre-applied thermal paste and a single breakout cable from the pump cap speed up installation and reduce cable clutter.
- WIDE COMPATIBILITY — Includes tool-free mounting brackets that support the latest AMD and Intel CPU sockets, including AM5 and LGA 1851.
Z63 vs X73: Pricing, Value, and Best Use Cases
The NZXT Kraken Z63 and X73 target slightly different buyers even though they share the same core Asetek-based cooling platform, NZXT CAM integration, sleeved tubing, and clean industrial styling. The Z63 is the more premium-looking option because of its 2.36-inch LCD on the pump cap, while the X73 puts more of its budget into radiator surface area with a 360mm layout. In practical terms, the Z63 is the showcase cooler; the X73 is the stronger value for users who care more about thermals per dollar.
Pricing varies by region and availability, but the Z63 typically commands a higher price than standard non-LCD 280mm coolers because the display is the main feature. The X73 is often less expensive than the Z63 despite using a larger 360mm radiator, making it attractive for high-core-count CPUs, sustained rendering workloads, and overclocked gaming systems. If your case supports both 280mm and 360mm radiators, the X73 usually offers the better cooling headroom for the money, especially when paired with a power-hungry Ryzen 9 or Core i9 processor.
| Model | Best For | Main Strength | Main Trade-Off |
|---|---|---|---|
| NZXT Kraken Z63 | Premium gaming builds, display-focused setups, compact high-end cases with 280mm support | Custom LCD for system stats, GIFs, and a standout visual centerpiece | Higher cost for similar or lower cooling capacity than larger non-LCD models |
| NZXT Kraken X73 | Performance-focused desktops, workstations, overclocked CPUs, cases with 360mm radiator mounts | Excellent thermal capacity and better value for sustained CPU loads | No LCD display; requires more case space |
The Z63 makes the most sense when aesthetics are part of the build objective. Its LCD can show CPU temperature, liquid temperature, custom images, animated GIFs, or branding, which is valuable in glass-panel cases where the pump block is clearly visible. It is also a strong fit for cases that lack 360mm radiator support but can handle a 280mm unit, since dual 140mm fans can still move plenty of air at lower rotational speeds. For gaming loads, general productivity, and lightly threaded tasks, the Z63 has more than enough cooling ability for most modern CPUs while adding a distinctive visual feature the X73 does not offer.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsThe X73 is the better pick for users who want maximum sustained performance without paying for the LCD. Its 360mm radiator and three 120mm fans provide more surface area, which helps during long all-core workloads such as video encoding, CPU rendering, code compilation, and heavy multitasking. It also gives more tuning flexibility: users can run the fans aggressively for peak cooling or set a quieter curve while still benefiting from the larger radiator. The catch is case compatibility. A 360mm radiator often needs a front or top mount with enough clearance for the radiator, fans, motherboard heatsinks, and tall memory modules.
For most buyers, the decision comes down to whether the display is worth the price premium. Choose the Kraken Z63 if you want a cleaner showpiece build, prefer the LCD customization, or are working inside a case better suited to 280mm cooling. Choose the Kraken X73 if you want stronger cooling value, plan to push a high-end CPU under long workloads, or simply prefer spending the budget on thermal performance instead of pump-block visuals. Both are capable premium AIOs, but the Z63 wins on presentation while the X73 wins on performance-per-dollar.
Frequently Asked Questions
Is the NZXT Kraken Z63 or X73 better for cooling a high-end CPU?
The Kraken X73 generally has the cooling advantage because its 360mm radiator provides more surface area than the Z63’s 280mm radiator. For sustained heavy loads on CPUs like a Core i9 or Ryzen 9, the X73 is usually the stronger choice if your case supports a 360mm radiator. The Z63 still performs very well, but its main appeal is the LCD display rather than maximum radiator capacity.
Is the LCD screen on the Kraken Z63 worth paying extra for?
The Z63’s LCD is worth it if you want a premium visual feature, such as displaying CPU temperatures, GIFs, custom images, or system stats directly on the pump block. It does not improve cooling performance compared with similar-sized AIOs, so the added cost is mostly for aesthetics and customization. If you care more about performance per dollar, the X73 is usually the better buy.
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Will the Kraken Z63 or X73 fit in my PC case?
You need to check radiator support in your case before buying either cooler. The Z63 uses a 280mm radiator, which typically requires two 140mm fan mounts, while the X73 uses a 360mm radiator with three 120mm fan mounts. Also check clearance near the motherboard, RAM, and top panel, because radiator thickness plus fans can cause fitment issues in some mid-tower cases.
Are the NZXT Kraken Z63 and X73 loud?
Both coolers can be quiet under light and moderate loads, especially with a custom fan curve in NZXT CAM. The X73 may run its three 120mm fans at lower speeds for similar cooling in some scenarios, while the Z63’s larger 140mm fans can also sound smoother at comparable airflow. Pump noise is generally low, but users sensitive to acoustics should avoid aggressive pump and fan profiles.
Do I need NZXT CAM to use these coolers?
The coolers can function without constant software interaction once connected, but NZXT CAM is needed to configure fan and pump behavior, RGB settings, and the Z63’s LCD display. For the Z63 in particular, CAM is a major part of the experience because it controls what appears on the screen. If you prefer not to run vendor software, you may not get full value from the Z-series model.
Bottom Line
The NZXT Kraken Z63 and X73 are both premium AIO coolers, but they appeal to different priorities. The Z63 is the better pick if you want a cleaner 280mm setup with the standout LCD display, while the X73 makes more sense for users chasing stronger radiator capacity, lower fan speeds under load, and better value per degree cooled.
Choose the Kraken Z63 for showcase builds where aesthetics and customization matter as much as thermals. Choose the Kraken X73 for high-end CPUs, overclocked systems, or larger cases where the 360mm radiator can fully stretch its legs.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
