Some links on this page are affiliate links: if you buy through them we may earn a commission, at no extra cost to you.
Verdict: The Addlink G55 is a credible, unusually efficient PCIe 5.0 SSD that delivers up to 10,300 MB/s sequential read performance without the power and heat demands of many early high-end Gen5 drives. It is a good buy when you have a PCIe 5.0 x4 slot and the price premium over a quality PCIe 4.0 SSD is modest. For gaming-only systems, Gen4 laptops, and general-purpose PCs, a cheaper Crucial T500, Samsung 990 Pro, or WD Black SN850X may be the more sensible purchase.
Addlink G55 specifications at a glance
| Feature | Addlink G55 |
|---|---|
| Interface | PCIe 5.0 x4, backward-compatible with PCIe 4.0 and PCIe 3.0 |
| Protocol | NVMe 2.0 |
| Form factor | M.2 2280, single-sided |
| Controller | Phison E31T, four-channel, DRAM-less |
| NAND | Kioxia BiCS8 TLC in the reviewed specification |
| Capacities | 1TB, 2TB, and 4TB, with market availability varying |
| 2TB rated speed | Up to 10,300 MB/s read and 9,000 MB/s write |
| Random performance | Up to 1.3 million read and 1.5 million write IOPS |
| Endurance | 600TBW, 1,200TBW, or 2,400TBW depending on capacity |
| Warranty | Five-year limited warranty, subject to regional terms and the drive’s Percentage Used condition |
| Bare-drive thickness | Approximately 2.3mm |
| Operating temperature | 0–70°C listed in Addlink’s technical documentation |
| Heatsink version | G55H, approximately 8.75mm thick according to Tom’s Hardware’s specification table |
These are manufacturer-rated maxima, not guarantees that every workload will run at 10GB/s. Addlink’s official specifications are available on the G55 product page and in its technical PDF.
What the G55 actually is
The G55 is a PCIe 5.0 x4 NVMe 2.0 SSD designed around Phison’s E31T controller. Unlike older, higher-power Gen5 designs, the E31T uses four NAND channels and has no dedicated DRAM package. It uses Host Memory Buffer, or HMB, to borrow a small amount of system memory for mapping data.
The reviewed drive uses Kioxia’s 218-layer BiCS8 TLC NAND and 3,600MT/s flash. Addlink also specifies SLC caching, LDPC and RAID error correction, TRIM, SMART monitoring, thermal throttling, dynamic wear leveling, bad-block management, and over-provisioning.
#1 Best Overall
- [Blazing Gen5 Speeds]: Sequential read/write up to 10,300/9,000 MB/s delivers lightning-fast load times for gaming, video editing, and AI workloads. Note: read/write speed depend on the device, interface, usage and other factors so that actual performance may be lower
- [Advanced NVMe M.2 Technology]: 3D TLC NAND with Host Memory Buffer (HMB) and TSMC 7nm controller ensures efficient, high-performance operation.
- [Universal PC Compatibility]: Optimized for Intel and AMD Gen5 platforms, backward compatible with PCIe 4.0/3.0 for seamless upgrades.
- [Ultra-Slim Design]: 2.3mm single-sided M.2 2280 form factor fits compact desktops and laptops; heatsink recommended for peak performance.
- [Trusted Reliability]: 5-year warranty with SSD Toolbox for drive health monitoring and firmware updates, ensuring long-term durability.
DRAM-less does not automatically mean slow or unreliable. The G55 can reach very high sequential speeds, and independent testing by Tom’s Hardware found high overall performance and unusually strong power efficiency. The trade-off is that HMB and firmware quality do more of the work normally handled by onboard DRAM, which can matter in sustained, metadata-heavy, or heavily fragmented workloads.
Retail SSD components can change during a product’s life. The NAND and controller details above describe the reviewed specification; buyers should not assume every future revision will be identical without checking the exact model and firmware.
G55 versus G55H: choose the right physical design
| Model | Physical design | Best suited to |
|---|---|---|
| G55 | Bare, approximately 2.3mm thick | Laptops, compact PCs, and desktops with a motherboard M.2 heatsink |
| G55H | Integrated heatsink, approximately 8.75mm thick | Desktops without an M.2 heatsink or sustained workloads requiring more thermal headroom |
The thin G55 is the more flexible version. A laptop’s M.2 slot may accept a bare 2280 drive but have no room for the G55H’s heatsink. In a desktop, the G55 is normally preferable when the motherboard already provides a properly fitted M.2 cover. The G55H makes more sense when there is no motherboard heatsink or when the drive will handle long transfers, video projects, scratch data, or other sustained work.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Neither version eliminates the need to check clearance. Motherboard shields, laptop covers, small-form-factor cases, and console compartments can all impose different height limits.
Rated speeds versus real-world performance
The headline “10GB/s” figure refers primarily to sequential transfers measured under favorable conditions, typically with synthetic benchmarks such as CrystalDiskMark. It does not mean that games launch twice as fast as they do from a good PCIe 4.0 SSD, nor that ordinary files will always move at 10,000MB/s.
For the manufacturer’s current ratings, the capacity differences are important:
Rank #2
- [High-Speed Gen5 Performance]: Sequential read/write up to 10,200/8,300 MB/s for smooth gaming, fast rendering, and efficient AI tasks. Note: read/write speed depend on the device, interface, usage and other factors so that actual performance may be lower.
- [Cutting-Edge NVMe M.2 Design]: 3D TLC NAND with Host Memory Buffer (HMB) and 7nm controller for reliable, high-speed performance.
- [Broad PC Compatibility]: Supports Intel and AMD Gen5 systems, backward compatible with PCIe 4.0/3.0 for versatile PC builds.
- [Compact and Sleek]: 2.3mm single-sided M.2 2280 form factor, ideal for space-constrained PCs; heatsink recommended for optimal use.
- [Long-Lasting Durability]: 5-year warranty and SSD Toolbox for easy drive management and firmware updates ensure reliability.
| Capacity | Sequential read | Sequential write | Random read | Random write | Endurance |
|---|---|---|---|---|---|
| 1TB | Up to 10,200MB/s | Up to 8,300MB/s | Up to 1.3M IOPS | Up to 1.5M IOPS | 600TBW |
| 2TB | Up to 10,300MB/s | Up to 9,000MB/s | Up to 1.3M IOPS | Up to 1.5M IOPS | 1,200TBW |
| 4TB | Up to 10,300MB/s | Up to 9,000MB/s | Confirm capacity-specific rating | Confirm capacity-specific rating | 2,400TBW |
There is also a sample-specific qualification. Guru3D’s review table lists 8,600MB/s sequential write for its sample, while Addlink’s current 2TB product specification lists up to 9,000MB/s. The safest interpretation is to treat the higher figure as a current manufacturer maximum, not a universal result for every capacity, firmware, or test setup.
Independent testing from Tom’s Hardware found the G55 competitive with early high-end E26-based PCIe 5.0 drives while using less power. That is the drive’s central achievement: it offers roughly 10GB/s-class performance in a cooler, more efficient design. It is not necessarily the fastest Gen5 SSD in every benchmark.
Sequential transfers
Large, contiguous files are where the G55’s PCIe 5.0 interface is easiest to justify. Moving a large video archive, installing a huge game library, cloning a fast source drive, or working with large datasets can benefit from the extra bandwidth—provided the source drive, destination drive, CPU, file system, and workload can keep the transfer fed.
Random and queue-depth workloads
Operating-system activity, application launches, and many game loads involve smaller random requests rather than long sequential streams. Queue depth also matters: a benchmark issuing many requests at once is not representative of a lightly loaded desktop. A Gen5 SSD can post a much larger sequential number while producing only a modest practical improvement in everyday responsiveness.
Sustained writes and SLC-cache exhaustion
The G55 uses an SLC cache to accelerate short and medium write bursts. Once that cache is exhausted, write speed can fall, sometimes substantially. The size and behavior of the cache depend on capacity, free space, firmware, and workload. A short benchmark may therefore show the advertised peak while a long, nearly full drive behaves differently.
Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesFor large-file work, leave adequate free space and use cooling appropriate to the system. A sustained-write test should measure the cache transition, post-cache speed, temperature, throttling, and recovery after idle time—not just the first few minutes of a benchmark.
Rank #3
- GEN4 SPEED, EVERYDAY VALUE: Sequential read/write speeds up to 6000/5400MB/s - roughly 10x SATA SSD speed - for fast boot, quick loading, and rapid large-file transfers
- EFFICIENT HMB DESIGN: DRAM-less architecture with Host Memory Buffer technology delivers strong Gen4 performance with low power draw - friendly to gaming laptop battery life
- ULTRA-SLIM M.2 2280: Just 2.25mm high, fits thin laptops, desktops, and mini PCs with a PCIe 4.0 slot; backward compatible with PCIe 3.0 (runs at Gen3 speed)
- BUILT TO LAST: Quality 3D TLC NAND flash with NVMe 1.4 support for dependable everyday computing, gaming, and content creation
- 5-YEAR LIMITED WARRANTY: Backed by addlink warranty and responsive customer support
Power consumption and cooling
The E31T controller is built on a 7nm process and supports power-management features including ASPM and APST. Addlink claims less than 3.5mW in the L1.2 idle state. That is an idle power figure, not peak active consumption, but it helps explain why the G55 is attractive for laptops and compact systems.
Tom’s Hardware reported strong power efficiency and found that the drive did not require a large heatsink in ordinary use. That should not be turned into the absolute claim that cooling is never needed. Ambient temperature, case airflow, slot placement, workload duration, and motherboard design all affect results.
- Desktop with an M.2 heatsink: choose the bare G55 and use the board’s cover if it makes proper contact.
- Laptop: use the bare G55 only after checking physical clearance, firmware support, and thermal limits.
- Small-form-factor PC: inspect airflow and the height of any drive cover before installation.
- Long writes or professional scratch work: use the G55H or a correctly fitted motherboard heatsink where possible.
Compatibility with PCIe 5.0, 4.0, and 3.0
The G55 needs a genuine PCIe 5.0 x4 M.2 slot to deliver its rated performance. It is backward-compatible with PCIe 4.0 and PCIe 3.0, but the older link determines the ceiling. Addlink says Gen4 operation reaches approximately 7,000MB/s; a Gen3 system will be constrained much further.
Recommended Free Tools
Before buying, check:
- That the slot supports NVMe rather than SATA-only M.2 drives.
- That it is wired for PCIe 5.0 x4, not merely physically compatible with an M.2 2280 drive.
- Whether CPU and chipset lanes are shared with the graphics card or another expansion slot.
- Whether populating the Gen5 slot disables or reduces another slot.
- Whether a laptop BIOS supports the intended NVMe drive.
- Whether the motherboard standoff, shield, and heatsink fit the selected G55 or G55H.
A Gen5 drive in a Gen4 laptop may work perfectly, but it will not provide Gen5 bandwidth. In that situation, a good Gen4 SSD is often less expensive and a better-balanced choice.
Gaming performance: fast, but not automatically faster in games
The G55 is excellent for installing and moving large games, but game loading rarely scales directly with sequential benchmark speed. Asset decompression, CPU work, random access, engine behavior, and background tasks all contribute to load times. In many titles, a quality PCIe 4.0 SSD will feel nearly indistinguishable from the G55.
The Gen5 premium becomes easier to justify when gaming is combined with large file transfers, game development, high-bitrate video work, software compilation, virtual machines, or AI datasets. If the system is used almost exclusively for gaming and the G55 costs substantially more than a Crucial T500, Samsung 990 Pro, or WD Black SN850X, buy the Gen4 model instead.
Rank #4
- [Next-Gen Speed]: Unleash PCIe Gen 4 power with 6000 MB/s read and 5700 MB/s write—up to 10x faster than SATA SSDs—for quick loading in Elden Ring and Monster Hunter Wilds. Note: read/write speed depend on the device, interface, usage and other factors so that actual performance may be lower.
- [Gaming Optimized]: Slash load times and boost responsiveness in AAA titles, making every second count for desktop gamers and competitive play. Reduces lag and boosts responsiveness, great for Path of Exile 2’s demanding encounters.
- [Perfect PC Upgrade]: Elevate any PCIe 4.0 desktop or gaming rig; no heatsink needed with standard cooling setups for easy installation.
- [Stable & Efficient]: Durable NAND and smart thermal design keep it cool and reliable, with a slim 2.25mm profile and 35% less power use for gaming and laptops.
- [Reliable Endurance]: Built with 3D TLC NAND and backed by a 5-year warranty, ensuring long-lasting speed for years of intense gaming and multitasking.
Laptop and compact-PC suitability
The single-sided, approximately 2.3mm bare-drive design is one of the G55’s strongest differentiators. It can fit compatible professional laptops, ultrabooks, and small-form-factor PCs where a tall heatsink-equipped SSD cannot.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Physical fit is only one requirement. The computer must have an M.2 2280 NVMe slot, and the laptop may support only PCIe 4.0 or 3.0. Laptop power limits and confined airflow can also prevent the drive from sustaining desktop-class performance. For a Gen4 laptop, the G55’s extra cost usually buys little practical benefit unless the drive is unusually well-priced.
Endurance, warranty, and software
Addlink rates the drive at 600TBW for 1TB, 1,200TBW for 2TB, and 2,400TBW for 4TB. TBW is an endurance and warranty rating, not a promise that the SSD will fail immediately after reaching that number. Conversely, a five-year warranty is not a substitute for a separate backup.
Addlink’s five-year limited warranty is subject to its regional terms and the drive’s Percentage Used condition. Confirm the applicable policy before purchase, particularly if the drive is imported.
The Addlink SSD Toolbox manual describes tools for viewing drive information and firmware, checking health and SMART data, identifying the drive, diagnosing problems, and performing a secure erase. Check for the latest firmware before benchmarking, but do not assume that a particular update is required unless Addlink lists it for your exact model.
Pricing and value
The G55 was positioned as an affordable PCIe 5.0 SSD, not necessarily as the cheapest SSD overall. That distinction matters. Tom’s Hardware identified launch pricing as a major weakness because a Crucial T500 and other strong PCIe 4.0 drives could be substantially cheaper while remaining competitive in everyday use.
Best Value
- Ideal for high speed, low power storage
- Gen 4x4 NVMe PCle performance
- Up to 5,000MB/s read, 3,000MB/s write
- Includes Acronis cloning software
- 5-year limited warranty
Pricing is also volatile. The supplied price-tracker snapshots showed the 2TB model at approximately $299.44 in one capture and $344.44 in a later capture. Those figures are historical signals rather than a current quote, and Addlink’s product page does not establish stable US retail availability. Check the actual price, shipping, warranty coverage, and return policy at the time of purchase.
| Alternative | Why consider it | When it is the better choice |
|---|---|---|
| Crucial T500 | Strong PCIe 4.0 performance and usually a more practical value proposition | Gaming, general desktop use, and Gen4 systems |
| Samsung 990 Pro | Mature premium Gen4 platform with Samsung’s software ecosystem; 2TB rated at 7,450MB/s read and 6,900MB/s write | Buyers prioritizing established Gen4 support over Gen5 bandwidth |
| WD Black SN850X | Widely available PCIe 4.0 gaming-oriented alternative, including heatsink versions | Gaming-focused systems and buyers wanting broad retail availability |
| Crucial T705 and other faster Gen5 models | Higher headline throughput, with the T705 listed at up to approximately 14,500MB/s in retailer specifications | Professional sequential workloads with strong M.2 cooling and a justifiable budget |
Do not compare only the sequential-read number. Compare cost per usable capacity, warranty, cooling requirements, sustained-write behavior, availability, and the performance your actual platform can use.
PS5 and console use
The G55’s M.2 2280 format does not by itself prove PlayStation 5 compatibility. The exact console clearance, heatsink height, and retail package must be checked. The bare G55 may be physically more suitable than the G55H, but buyers should verify the specific model and installation dimensions before purchase rather than assuming every package fits.
Buying advice by user type
- PCIe 5.0 desktop: Buy the G55 when its price is close to premium Gen4 models and you want efficient Gen5 throughput. Use a motherboard heatsink or choose the G55H for sustained writes.
- PCIe 4.0 desktop: Choose a quality Gen4 SSD unless the G55 is unusually cheap. You will not receive its headline Gen5 performance.
- Laptop: Choose the bare G55 only if the laptop supports the drive electrically and physically. A Gen4 SSD is usually better value in a Gen4 machine.
- Gaming-only PC: Prefer the least expensive reputable SSD that meets your capacity and endurance needs. The G55’s extra sequential bandwidth rarely transforms game loading.
- Creator or data-heavy workstation: The G55 is more compelling for large transfers, project files, compilation, virtual machines, and AI datasets, especially when low power matters.
- Sustained-write professional workload: Consider the G55H or motherboard cooling, and compare post-cache performance with higher-end Gen5 drives before buying.
- PS5: Verify the exact heatsink and clearance requirements for the retail model.
Final verdict
The Addlink G55 is one of the more sensible low-power PCIe 5.0 SSDs from the early Gen5 generation. Its Phison E31T controller, TLC NAND, thin single-sided layout, and strong efficiency make it more versatile than a hot, oversized enthusiast drive. The G55H provides a useful desktop cooling option, while the bare G55 is the version to investigate for laptops and compact systems.
It is not automatically the best-value SSD. If your computer is limited to PCIe 4.0, or if your main use is gaming and ordinary applications, a cheaper Crucial T500, Samsung 990 Pro, or WD Black SN850X is likely the rational choice. Buy the G55 when you can use PCIe 5.0, value high-throughput storage work, need a thin low-power design, and find the Gen5 premium reasonable.
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.
