# Mushkin Gamma 4TB Review — Phison E18 With Real Endurance (2026)

The Mushkin Gamma 4TB takes Phison's proven E18 flagship design and stretches it to 4 TB with a 3,000 TBW endurance budget and 7,200/6,890 MB/s ratings.

Quick answer: The Mushkin Gamma 4TB makes sense for two buyers: enthusiasts who specifically want a DRAM-cached, Phison E18 platform at 4 TB, and creators whose workloads value the 3,000 TBW endurance budget over a last few hundred megabytes per second. Skip it if you want the cheapest capacity per terabyte — the DRAM-less Lexar NM790 4TB serves that crowd — or if flagship bragging rights matter, where the WD Black SN850X and Samsung 990 Pro post higher rated writes and deeper review pools. What the Gamma offers instead is predictability: a mature controller, DRAM steadying heavy random writes, and endurance that removes any anxiety about write wear. For a proven, fully DRAM-equipped Gen4 design with room to spare, the Gamma 4TB is an easy recommendation to stand behind.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 4 TB |
| Interface | M.2 4.0 x 4 |
| Controller | Phison PS5018 E18 8 Channel |
| Memory type | Micron 96-L TLC |
| DRAM cache | Yes |
| Sequential read | 7200 MB/s |
| Sequential write | 6890 MB/s |
| Random read IOPS | 660000 |
| Random write IOPS | 1250000 |
| Endurance | 3000 TBW |
| MTBF | 1600000 |
| Warranty | 5 years |

## Performance

Mushkin rates the Gamma 4TB at 7,200 MB/s sequential reads and 6,890 MB/s writes, with 660K random-read and 1,250K random-write IOPS — manufacturer figures, but they sit exactly where E18 drives with TLC land in independent testing. Tom's Hardware's review of the line summed the platform up as fast, cool and well priced, and The SSD Review's 2 TB deep dive confirmed the hardware as a genuine flagship E18 build rather than a rebadged value board.

In practice, the 7,200 MB/s read rating means operating system boots and game loads that are indistinguishable from any top-tier PCIe 4.0 drive, and the near-7,000 MB/s write rating keeps large installs and file copies moving at full wire speed for the interface. The SLC cache absorbs burst writes first; once it exhausts on very large sustained transfers, throughput settles to native TLC rates — with 4 TB of dies behind it, the cache is deep enough that only multi-hundred-gigabyte copy sessions will see the drop. Random-write strength of 1,250K IOPS keeps heavy multitasking, compile jobs and small-file work responsive.

Thermals deserve planning rather than concern: the E18 is a warm-running controller at sustained load, and this board ships without a heatsink. Under a motherboard's heatspreader it behaves like any other E18 drive; bare in a laptop slot, expect throttling only during long, full-speed writes. For DirectStorage games and general desktop work, the platform is mature, well supported by Phison's toolbox ecosystem, and behaves predictably.

## Endurance, TBW & Warranty

Mushkin backs the Gamma 4TB with a 5-year limited warranty rated to 3,000 TBW, whichever arrives first. That endurance figure is roughly 375 TBW per terabyte — a class-leading budget that lets the drive take sustained creator workloads without flinching. To burn through 3,000 TBW within the warranty period you would need to write over 100 GB every day for five years straight, far beyond anything a gaming PC or typical workstation produces. The rated MTBF is 1,600,000 hours, a population statistic that describes expected failure rates across large fleets rather than a promise about any individual drive. Warranty claims run through Mushkin's standard support channels with proof of purchase; the smaller Gamma capacities carry the same 5-year term with endurance scaled to capacity. Note that no heatsink is included, and adding third-party cooling does not affect warranty coverage.

## Pros and Cons

**Pros:**

- 7,200 MB/s reads and 6,890 MB/s writes rated
- 3,000 TBW endurance with 5-year warranty
- Phison E18 with DDR4 DRAM cache
- 1,250K random-write IOPS rating
- AES-256 hardware encryption
**Cons:**

- Ships without a heatsink
- Rated writes sit just below the 7,000 MB/s flagship tier
- Micron 96-layer TLC is an older-generation fabric
- Phison E18 draws more power than newer DRAM-less designs


## Verdict

The Mushkin Gamma 4TB makes sense for two buyers: enthusiasts who specifically want a DRAM-cached, Phison E18 platform at 4 TB, and creators whose workloads value the 3,000 TBW endurance budget over a last few hundred megabytes per second. Skip it if you want the cheapest capacity per terabyte — the DRAM-less Lexar NM790 4TB serves that crowd — or if flagship bragging rights matter, where the WD Black SN850X and Samsung 990 Pro post higher rated writes and deeper review pools. What the Gamma offers instead is predictability: a mature controller, DRAM steadying heavy random writes, and endurance that removes any anxiety about write wear. For a proven, fully DRAM-equipped Gen4 design with room to spare, the Gamma 4TB is an easy recommendation to stand behind.

## Frequently Asked Questions

### Does the Mushkin Gamma 4TB work in a PS5?

Yes, with one preparation step. The drive meets Sony's published guidance: PCIe 4.0 NVMe with a 7,200 MB/s read rating sits well above Sony's 5,500 MB/s recommendation, and the M.2 2280 body fits the console's dimensions. However, the Gamma ships as a bare board without a heatsink, and Sony requires cooling, so you must add a low-profile heatsink yourself. Also note that E18 boards at this capacity are typically double-sided, so total installed height matters — a slim graphite pad rather than a chunky finned cooler is the safer choice for the PS5's internal bay.

### Is the Mushkin Gamma 4TB good for gaming?

Yes — a 7,200 MB/s read rating is effectively the ceiling of what PCIe 4.0 gaming systems can exploit. Game installs write at close to 7,000 MB/s until the SLC cache is exhausted, level loading is indistinguishable from any flagship Gen4 drive, and DirectStorage titles benefit from the platform's mature NVMe 1.4 implementation. The 4 TB capacity is the real argument for gamers: it holds a large modern library with room for the operating system, and the 3,000 TBW endurance budget means repeated big installs never become a wear concern.

### Does the Mushkin Gamma have a DRAM cache?

Yes. The Gamma is built on the Phison PS5018-E18, an 8-channel controller that pairs with dedicated DDR4 DRAM for the flash translation tables. The SSD Review's teardown of the 2 TB model found 2 GB of SK Hynix DDR4 on board, with the DRAM scaling alongside capacity. This is the Gamma's key structural difference from budget Gen4 drives such as the Lexar NM790 or Netac NV7000-t, which are DRAM-less and lean on the Host Memory Buffer instead. A DRAM cache does not change game load times much, but it steadies behavior under heavy random writes and mixed workloads.

### What is the TBW endurance of the Mushkin Gamma 4TB?

Mushkin rates the 4 TB Gamma at 3,000 TBW — total terabytes written — alongside a 5-year limited warranty, whichever limit arrives first. That is a large budget for a consumer drive: writing 100 GB per day, every day, would still take more than eight decades to exhaust. The endurance rating scales with capacity across the Gamma line, so smaller versions carry proportionally smaller TBW figures under the same 5-year term. For a content creator writing hundreds of gigabytes daily, this drive's rating is among the most generous in the PCIe 4.0 consumer class.

### Mushkin Gamma 4TB or WD Black SN850X 4TB?

Both are DRAM-cached PCIe 4.0 flagships, and both carry 5-year warranties. The SN850X's rated writes edge higher — WD quotes up to 7,100 MB/s on the 4 TB — and it ships with an optional heatsink variant plus the deepest pool of independent benchmark data. The Gamma counters with its 3,000 TBW endurance budget and typically lower pricing for the same capacity. Real-world gaming and desktop differences between the two are marginal; choose the SN850X for brand track record and peak sustained speed, and the Gamma when endurance per dollar and E18 platform maturity lead the decision.

### What controller and NAND does the Mushkin Gamma 4TB use?

The Gamma 4TB pairs Phison's PS5018-E18 — an 8-channel PCIe 4.0 controller that defined the first wave of 7 GB/s drives — with Micron 96-layer 3D TLC NAND, DDR4 DRAM and Phison's MEDS protection suite covering LDPC ECC, end-to-end data path protection and AES-256 encryption. The SSD Review's board-level teardown of the 2 TB model confirmed that hardware directly. It is an older-generation fabric than 176-layer or 232-layer NAND used in 2023-2024 drives, which shows up mainly in power efficiency rather than in the 7,200/6,890 MB/s ratings this capacity carries.

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Last updated: 2026-10-07. Source: https://ssdrive.net/mushkin-gamma-4-tb