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The Intel Core i9-9980XE was an outstanding high-end desktop processor in 2018, but it is not a sensible new-platform purchase in 2026. Its 18 cores, 36 threads, quad-channel memory, 44 PCIe lanes and AVX-512 support made it exceptionally capable for many professional workloads. However, its improvement over the i9-7980XE was modest, its $1,979 launch price was difficult to justify, and Intel now lists the X299 processor as discontinued. Today, it is worth considering mainly as a low-cost upgrade for an existing, compatible X299 system.
Intel Core i9-9980XE specifications
| Specification | Core i9-9980XE |
|---|---|
| Launch period | Q4 2018 |
| Architecture | Skylake-X Refresh (Basin Falls Refresh), 14 nm |
| Cores / threads | 18 / 36 |
| Base frequency | 3.00 GHz |
| Maximum Turbo Boost 2.0 | 4.40 GHz |
| Turbo Boost Max 3.0 | 4.50 GHz |
| Cache | 24.75 MB Intel Smart Cache |
| TDP | 165 W |
| Socket / chipset | LGA2066 / Intel X299 |
| Memory | Quad-channel DDR4-2666, up to 128 GB officially |
| PCIe | PCIe 3.0, up to 44 CPU lanes |
| Integrated graphics | None |
| AVX-512 | Supported, with two AVX-512 FMA units |
| Multiplier | Unlocked |
| Launch recommended price | $1,979 |
| Current status | Discontinued |
Intel’s specification page lists 44 processor PCIe lanes. Some period marketing material referred to “up to 68” lanes for the wider Core X platform, but that figure should not be confused with the CPU’s direct lane count.
There is no integrated graphics, so a discrete graphics card is required. Intel also supplied no boxed heatsink or fan. The processor needs an X299 motherboard, suitable BIOS support and serious cooling for sustained heavy workloads.
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The 9980XE kept the same 18-core/36-thread layout, cache size, LGA2066 socket, X299 platform, quad-channel DDR4 support and 165 W TDP as the i9-7980XE. It was a refresh rather than a new architecture.
#1 Best Overall
- 18 Cores/36 Threads
- 3. 00 GHz up to 4. 40 GHz Max Turbo Frequency/24. 75 MB Cache
- Quad DDR4-2666 Memory channels
- Compatible only with Motherboards based on Intel x299 chipsets
- Intel Optane Memory Supported
The important changes were higher frequencies and the revised 14 nm implementation. Base clock rose from 2.60 GHz to 3.00 GHz, maximum Turbo Boost 2.0 increased from 4.20 GHz to 4.40 GHz, and Turbo Boost Max 3.0 increased from 4.40 GHz to 4.50 GHz. That explains the character of the upgrade: useful, but not transformational.
In AnandTech’s contemporary testing, performance gains over the 7980XE were generally around 0–10%, depending on the workload. Full-load power use was also somewhat higher. An owner of a working 7980XE should therefore expect a refinement, not a completely different class of performance.
2018 performance: fast, but workload-dependent
Contemporary reviews generally placed the 9980XE at or near the top of the high-end desktop market. TechRadar described it as the fastest HEDT processor at the time, while also noting that its lead over Threadripper was narrow and its price was hard to defend.
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AnandTech found the 9980XE particularly competitive in general workflow and lightly threaded tasks, memory-sensitive workloads, compression, video transcoding and software that could use AVX-512. Its combination of high single-thread responsiveness, substantial memory bandwidth and 18 conventional cores made it strong as a mixed-use workstation.
AVX-512 is especially important when the application genuinely supports it. It can produce a very different ranking from a rendering workload that simply scales across many conventional cores, so the processor’s core count alone does not predict its performance.
Rank #2
- 18 Cores/36 Threads
- 3.00 GHz up to 4.40 GHz Max Turbo Frequency/24.75 MB Cache
- Quad DDR4-2666 Memory channels
- Compatible only with Motherboards based on Intel x299 chipsets
- Intel Optane Memory supported
Where Threadripper could win
AMD’s Threadripper processors were not universally slower. AnandTech recorded AMD advantages in several rendering applications, including Blender, Corona, POV-Ray and Cinema 4D. The result depended on the exact software version, thread scaling, memory behavior and benchmark settings.
That is why “the fastest CPU” is too broad a description. The 9980XE was a 2018 HEDT performance leader in many tests, not every application and certainly not a modern all-purpose performance champion.
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Gaming performance
The 9980XE’s flagship branding did not make it a good gaming-value processor. AnandTech found only about a 2–4% improvement over the 7980XE in its 720p testing, with individual games varying from negligible gains to more noticeable increases. At higher resolutions, GPU limitations reduced the difference substantially.
720p testing is useful because it exposes CPU differences before the graphics card becomes the bottleneck. It does not represent typical 1440p or 4K play with a modern GPU. TechRadar likewise found that the processor could reduce graphics-card bottlenecks in some tests but had little effect in at least one CPU-intensive title.
For a gaming-focused buyer, a mainstream processor such as the period-correct Core i9-9900K was a more appropriate choice. The 9980XE’s extra cores, quad-channel memory and PCIe connectivity matter far more in workstation tasks than in ordinary gaming.
How to read the benchmark results
Results from different reviews should not be combined into one definitive ranking. AnandTech and TechRadar used different test systems, software, memory policies, cooling and settings. AnandTech specifically noted that DRAM speed affected some system tests and used manufacturer-supported memory configurations.
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Motherboard power limits, BIOS versions, operating-system patches, security mitigations, turbo behavior and cooling can all change results. A benchmark suite favoring AVX-512 may favor Intel, while a renderer scaling efficiently across many cores may favor Threadripper. These are workload characteristics, not contradictions.
TechRadar tested the processor in a Windows 10 system with an X299 motherboard, 32 GB of DDR4-3200, a GeForce GTX 1080 Ti, NVMe storage and Corsair H100i v2 cooling. Its review also reported that the monitoring tools could not correctly measure processor power, so its thermal observations should not be converted into a general claim that the 9980XE is efficient.
Power, thermals and overclocking
The official 165 W TDP is not a guaranteed ceiling for package power. Unrestricted all-core workloads, AVX-512 instructions, motherboard settings, ambient temperature and overclocking can substantially increase heat and consumption.
The multiplier is unlocked, and the soldered heat spreader improved thermal transfer compared with earlier designs. Nevertheless, overclocking depends on silicon quality, VRM capability, cooling, load-line calibration, BIOS behavior and any AVX offset. There is no responsible universal overclock or temperature target.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchIntel’s support guidance says its BXTS13X liquid-cooling solution is not recommended for 165 W Core X processors. Choose a cooler whose manufacturer explicitly supports LGA2066 and sustained high-power workloads, and check radiator clearance, mounting hardware and the condition of used pumps before buying.
Launch price and competition
The 9980XE launched at a recommended customer price of $1,979, excluding the X299 motherboard, memory, graphics card, storage and cooling. That was only slightly below the 7980XE’s $1,999 launch price.
For comparison, contemporary Threadripper launch prices were $899 for the 2950X, $1,299 for the 2970WX and $1,799 for the 2990WX. Those are 2018 launch prices, not current used-market values.
- Core i9-7980XE: the closest lower-cost Intel alternative for an X299 owner. Its performance class is similar, and the 9980XE’s advantage is mainly higher clock speed.
- Core i9-10980XE: a later X299-compatible Intel HEDT option, but Intel also lists it as discontinued.
- Threadripper 2950X, 2970WX and 2990WX: important contemporary alternatives with greater core-count-per-dollar, though their advantages varied by application.
- Core i9-9900K: a better period choice for gaming and ordinary desktop work, but not a substitute for the 9980XE’s cores, memory channels or PCIe connectivity.
Compatibility and upgrade advice
The 9980XE uses the same broad LGA2066/X299 ecosystem as the 7980XE, so it can be a practical upgrade in an existing system. Compatibility is not automatic, however. Check the exact motherboard model, the manufacturer’s BIOS release notes, VRM capability and cooling design before ordering.
For maximum bandwidth, use a properly configured quad-channel memory kit. Do not assume that filling every slot automatically produces the best result: memory speed, timings, capacity, rank configuration and BIOS settings can affect applications differently.
Best Value
- Game without compromise. Play harder and work smarter with Intel Core 14th Gen processors
- 24 cores (8 P-cores plus 16 E-cores) and 32 threads. Integrated Intel UHD Graphics 770 included
- Leading max clock speed of up to 6.0 GHz gives you smoother game play, higher frame rates, and rapid responsiveness
- Compatible with Intel 600-series (with potential BIOS update) or 700-series chipset-based motherboards
- DDR4 and DDR5 platform support cuts your load times and gives you the space to run the most demanding games
Before buying a used chip, verify that it is a retail processor rather than an engineering sample, confirm the exact model and stepping, inspect the pads for damage, ask for evidence that it works, and use a seller with a clear return policy. Be especially cautious with delidded parts, tray CPUs of uncertain provenance and listings that provide no compatibility or testing information.
Should you buy the i9-9980XE in 2026?
| Reader situation | Recommendation |
|---|---|
| Existing X299 owner seeking more multi-core performance | Consider only at a strong used price and after checking BIOS and cooling support. |
| New workstation builder | Avoid building around this discontinued platform. |
| Gaming-focused buyer | Avoid; its HEDT features do not justify the platform cost. |
| AVX-512-dependent legacy workload | Potentially useful, but validate the software and its support on the target operating system. |
| Collector or period-correct enthusiast build | Reasonable if condition, provenance and price are acceptable. |
| Buyer needing current support and expansion | Avoid; look for a current platform with modern PCIe, memory and firmware support. |
Intel marks the processor as discontinued and lists December 31, 2023 as the end of servicing updates. That does not make every used 9980XE unusable, but it does make platform age, support and failure risk part of the purchase decision.
Do not judge the deal by CPU price alone. Add the cost of an X299 motherboard, quad-channel DDR4, cooling, graphics and storage, then compare the complete system with a newer workstation platform. A seemingly cheap processor can be poor value if the motherboard is scarce or expensive.
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