# Team Group Cardea Z44Q 2TB — QLC PCIe 4.0 NVMe SSD Review (2026)

The Team Group Cardea Z44Q 2 TB is a Phison E16-powered PCIe 4.0 drive that pairs QLC NAND with a DRAM cache, trading sustained write endurance for cost-effective high capacity.

Quick answer: The Cardea Z44Q 2 TB is a well-executed QLC drive that benefits from an increasingly rare combination: QLC NAND paired with a DRAM cache. It delivers PCIe 4.0 read speeds at a capacity and price point that TLC drives struggle to match, and its 5,000 MB/s reads make it a strong choice for a dedicated game library, media archive, or secondary fast storage where writes are occasional and reads dominate. The trade-offs are real — native QLC writes after the SLC cache exhausts are hard-drive-slow, and 800 TBW endurance is below the TLC norm — but they land in places that the Z44Q's target buyer rarely visits. For an OS boot drive or a mixed read-write workload, skip the Z44Q and buy a TLC drive. For a cost-effective 2 TB of fast read storage with DRAM, the Z44Q fills a specific and shrinking niche.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 2 TB |
| Interface | M.2 4.0 x 4 |
| Controller | Phison PS5016-E16 |
| Memory type | Micron 3D QLC |
| DRAM cache | SK Hynix DDR4 |
| Sequential read | 5000 MB/s |
| Sequential write | 3700 MB/s |
| Random read IOPS | 350000 |
| Random write IOPS | 600000 |
| Endurance | 400 TBW |
| MTBF | 3000000 |
| Warranty | 5 years |

## Performance

Team Group rates the 2 TB Z44Q at 5,000 MB/s sequential reads and 4,000 MB/s sequential writes, with random IOPS of 350,000 read and 600,000 write — figures that reflect the E16 controller's PCIe 4.0 capability without reaching the ~7,000 MB/s ceiling of second-generation Gen4 controllers like the Phison E18. The read throughput is sufficient for any consumer application, and the write figure benefits from the 2 TB variant's generous SLC cache, which can absorb roughly 200–300 GB of burst writes at full speed before transitioning to native QLC speeds.

Once the SLC cache is exhausted, native QLC sequential writes drop to approximately 150–200 MB/s — roughly hard-drive territory, and the defining weakness of the QLC platform. On a 2 TB drive used as a game library, this scenario is rare: game installs are bottlenecked by internet download speeds or optical-disc read rates long before the drive's write speed becomes limiting. For content creators ingesting large video files or running database workloads, the post-cache write cliff is a genuine constraint and a TLC drive like the WD Black SN770 or Samsung 980 Pro is a better tool for the job. The graphene-copper heat spreader provides adequate passive cooling for the E16 controller, though sustained sequential writes that fill the SLC cache will also generate enough heat to push the controller toward its throttle point in poorly ventilated chassis.

## Endurance, TBW & Warranty

Team Group backs the Z44Q 2 TB with a five-year warranty, limited by an 800 TBW endurance rating. At 30 GB/day, this endurance budget spans roughly 73 years — ample for the read-heavy workloads a QLC drive is designed for. The 1 TB Z44Q carries 400 TBW, maintaining the same 400-TBW-per-terabyte ratio. For comparison, a TLC drive at 2 TB typically carries 1,200–1,400 TBW, roughly 50–75% more endurance per terabyte. The lower figure is not a reliability concern for the Z44Q's intended use as a game library or media drive, where writes are dominated by one-time game installs and periodic updates. Users planning to use the Z44Q as a video-editing scratch disk or for any workload involving sustained writes should factor the lower TBW ceiling into their drive selection.

## Pros and Cons

**Pros:**

- 5,000 MB/s PCIe 4.0 reads — fast enough for any game or media library
- DRAM cache included — increasingly rare on QLC NVMe drives
- 2 TB at a QLC price point — cost-effective large capacity
- Graphene-copper heat spreader — thin and functional
- 5-year warranty — competitive for a QLC platform
**Cons:**

- Post-SLC-cache writes drop to ~150 MB/s — hard-drive territory
- 800 TBW endurance — roughly half the TLC norm per terabyte
- Phison E16 is a first-generation PCIe 4.0 controller, outpaced by E18/E21T
- Only 1 TB and 2 TB capacities — no 4 TB option for QLC's capacity strength


## Verdict

The Cardea Z44Q 2 TB is a well-executed QLC drive that benefits from an increasingly rare combination: QLC NAND paired with a DRAM cache. It delivers PCIe 4.0 read speeds at a capacity and price point that TLC drives struggle to match, and its 5,000 MB/s reads make it a strong choice for a dedicated game library, media archive, or secondary fast storage where writes are occasional and reads dominate. The trade-offs are real — native QLC writes after the SLC cache exhausts are hard-drive-slow, and 800 TBW endurance is below the TLC norm — but they land in places that the Z44Q's target buyer rarely visits. For an OS boot drive or a mixed read-write workload, skip the Z44Q and buy a TLC drive. For a cost-effective 2 TB of fast read storage with DRAM, the Z44Q fills a specific and shrinking niche.

## Frequently Asked Questions

### Is the Team Group Cardea Z44Q good for gaming?

For a dedicated game library drive, the Z44Q 2 TB is an excellent fit. Game loads are read-dominated, and the drive's 5,000 MB/s reads are more than sufficient for fast level loads and texture streaming. Game installs from a digital storefront benefit from the large SLC cache, which absorbs the download and decompression at full speed. The QLC write penalty only surfaces after the cache fills, which rarely happens during normal gaming use. The 2 TB capacity holds a substantial game library, and the DRAM cache helps keep random read latency low during gameplay. For an OS-plus-games combined drive, the Z44Q is viable but a TLC alternative will offer better consistency for the mixed read-write OS workload.

### Does the Cardea Z44Q have a DRAM cache?

Yes, the Z44Q includes a dedicated DRAM cache — SK Hynix DDR4 — paired with the Phison E16 controller. This is notable because most modern QLC drives have moved to DRAM-less HMB designs to reduce cost. The DRAM cache stores the flash translation layer mapping tables, allowing the controller to locate data on the QLC NAND without relying on slower system RAM accesses. The practical benefit is more consistent random I/O latency, which matters for an OS drive or any workload involving frequent metadata operations. If you are specifically looking for a QLC drive with DRAM, the Z44Q and the Sabrent Rocket Q4 are among the few remaining options.

### What is the TBW endurance of the Z44Q 2TB?

The 2 TB Z44Q is rated for 800 TBW, equivalent to roughly 438 GB of writes per day over the five-year warranty period. For a game library or media drive, this is more than sufficient — games are written once during install and then read millions of times, so the total bytes written over the drive's life are dominated by installs and periodic updates. The 800 TBW figure is approximately half what a TLC drive of the same capacity would carry, reflecting QLC NAND's higher write amplification and lower per-cell endurance. If your workload involves daily multi-hundred-gigabyte writes, a TLC drive is the appropriate tool.

### Why are Z44Q write speeds slow after the cache fills?

The Z44Q uses QLC NAND, where each flash cell stores four bits of data. Writing four bits per cell requires more precise voltage control and takes longer than writing the three bits per cell of TLC or the single bit of SLC. To mask this, the drive provisions a portion of the QLC as a fast SLC-mode write cache — but once that cache is full, incoming writes must go directly to the QLC at its native programming speed, which drops to roughly 150–200 MB/s on the E16 platform. This is a fundamental QLC characteristic, not a defect. The cache on the 2 TB Z44Q is large enough that most consumer write bursts never exhaust it; users who regularly write hundreds of gigabytes in a single session should choose a TLC drive instead.

### Is the Z44Q compatible with the PS5?

The Z44Q uses a PCIe 4.0 x4 M.2 2280 interface and is physically compatible with the PS5 expansion bay. However, its 5,000 MB/s sequential read speed is below Sony's recommended 5,500 MB/s minimum, so the PS5 will likely display a performance warning. For guaranteed PS5 compatibility, a PCIe 4.0 drive rated at 5,500 MB/s or higher is recommended. The Z44Q's QLC NAND and post-cache write behaviour also make it a suboptimal choice for the PS5's use case, where game installs and updates involve large sequential writes that can exhaust the SLC cache.

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Last updated: 2026-06-05. Source: https://ssdrive.net/team-group-cardea-z44q-2-tb