# Team Group Cardea Zero Z340 256GB — PCIe 3.0 NVMe SSD Review (2026)

The Team Group Cardea Zero Z340 256 GB is a Phison E12-powered PCIe 3.0 NVMe drive whose ultra-thin graphene-copper heat spreader keeps it relevant for compact builds years after launch.

Quick answer: The 256 GB Cardea Zero Z340 makes the most sense as a boot drive for a budget desktop or as a secondary-drive upgrade in a laptop where the graphene-copper cooler sidesteps clearance issues that aluminium heatsinks create. Buyers who need a dedicated game library drive or a scratch disk for video editing should look at the 1 TB variant instead — 256 GB is cramped for those use cases and the higher-capacity models carry better sustained-write throughput. Among Phison E12 contemporaries, the Z340 is indistinguishable on raw performance from the Sabrent Rocket or Silicon Power P34A80, so the buying decision reduces to warranty terms and whether the ultra-thin cooler matters for your build. It is a well-executed Gen3 reference design that does exactly what it says on the box and holds up as a competent, DRAM-equipped NVMe option in a market increasingly dominated by DRAM-less cost-cutters.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 256 GB |
| Interface | M.2 3.0 x 4 |
| Controller | Phison PS5012-E12 |
| Memory type | 3D TLC |
| DRAM cache | 1GB DDR4 |
| Sequential read | 3400 MB/s |
| Sequential write | 3000 MB/s |
| Random read IOPS | 450000 |
| Random write IOPS | 400000 |
| Endurance | 380 TBW |
| MTBF | 2 |
| Warranty | 5 years |

## Performance

Team Group rates the 256 GB Cardea Zero Z340 at 3,400 MB/s sequential reads and 3,000 MB/s sequential writes, figures that sit at the PCIe 3.0 x4 ceiling for reads and come within striking distance for writes. Random performance is rated at 450,000 IOPS read and 400,000 IOPS write, placing it in the upper tier of Gen3 drives with DRAM.

Independent reviewers consistently measure peak sequential reads within 2–3% of the rated 3,400 MB/s, and the Phison E12's pseudo-SLC cache absorbs burst writes well enough that most real-world workloads — game installs, OS image deployments, 4K video file transfers — never exhaust the buffer. Sustained sequential writes after the SLC cache fills settle around 500–600 MB/s, which is typical for TLC drives of this generation and irrelevant for the boot-drive role a 256 GB SSD normally fills. For gaming, load times between the Z340 and a SATA SSD are night-and-day, while the gap to a PCIe 4.0 drive is measurable in benchmarks but rarely perceptible without a stopwatch. The graphene-copper heat spreader earns its keep in airflow-starved environments: reviewers report the Z340 throttles later than bare Phison E12 drives under sustained write loads, though a motherboard heatsink still outperforms it in well-ventilated desktops.

## Endurance, TBW & Warranty

Team Group backs the Cardea Zero Z340 with a five-year warranty, limited by the 380 TBW endurance rating on the 256 GB model. At a typical consumer workload of 20 GB written per day, that TBW budget stretches past 50 years — endurance is effectively a non-issue for a boot drive of this capacity, where writes are dominated by OS updates and application installs rather than sustained data ingest. Higher-capacity Z340 variants bump TBW proportionally: the 512 GB model carries 800 TBW, the 1 TB model 1,600 TBW, and the 2 TB model reaches 3,200 TBW. The drive carries the standard 2-million-hour MTBF figure common across the Phison E12 reference family, though MTBF is a population-level reliability statistic and should not be interpreted as an individual drive's expected lifespan. Warranty service goes through Team Group's RMA channel rather than retailer point-of-sale in most regions.

## Pros and Cons

**Pros:**

- 3,400 MB/s sequential reads, saturating PCIe 3.0 x4
- 1 GB DRAM cache — no HMB compromises under sustained load
- Graphene-copper heat spreader fits in ultra-thin laptops and PS5
- Single-sided M.2 2280 PCB compatible with thin notebooks
- 380 TBW endurance backed by a 5-year warranty
**Cons:**

- Sustained TLC writes drop to ~500 MB/s after SLC cache exhausts
- Graphene cooler underperforms finned aluminium in desktop airflow
- 256 GB capacity limits practical use to OS and core applications
- Phison E12 reference design — near-identical alternatives exist


## Verdict

The 256 GB Cardea Zero Z340 makes the most sense as a boot drive for a budget desktop or as a secondary-drive upgrade in a laptop where the graphene-copper cooler sidesteps clearance issues that aluminium heatsinks create. Buyers who need a dedicated game library drive or a scratch disk for video editing should look at the 1 TB variant instead — 256 GB is cramped for those use cases and the higher-capacity models carry better sustained-write throughput. Among Phison E12 contemporaries, the Z340 is indistinguishable on raw performance from the Sabrent Rocket or Silicon Power P34A80, so the buying decision reduces to warranty terms and whether the ultra-thin cooler matters for your build. It is a well-executed Gen3 reference design that does exactly what it says on the box and holds up as a competent, DRAM-equipped NVMe option in a market increasingly dominated by DRAM-less cost-cutters.

## Frequently Asked Questions

### Is the Team Group Cardea Zero Z340 256GB good for gaming?

For game load times, the Z340 256 GB is a solid Gen3 performer that will saturate PCIe 3.0 reads at 3,400 MB/s. You will see dramatically faster level loads coming from a SATA SSD or hard drive, and the gap to a PCIe 4.0 drive in actual game load times is typically under one second. The real constraint for gaming on the 256 GB variant is capacity — modern titles routinely exceed 100 GB each, so you will fit one or two large games alongside the OS before running out of space. If gaming is your primary use, the 1 TB Z340 or a larger-capacity Gen3 drive is a better fit.

### Is the Cardea Zero Z340 compatible with the PS5?

The Cardea Zero Z340 meets Sony's published PS5 expansion requirements on paper: it is a PCIe 4.0-spec-slot-compatible NVMe M.2 2280 drive with a single-sided PCB and the graphene-copper cooler adds negligible thickness. However, Sony officially recommends a minimum 5,500 MB/s sequential read speed for PS5 storage expansion, and the Z340 is a PCIe 3.0 drive rated at 3,400 MB/s — well below that threshold. It will physically fit and the PS5 will recognise it, but the console will warn that performance may be insufficient for PS5-native titles. For a guaranteed PS5 experience, a PCIe 4.0 drive rated at 5,500 MB/s or higher is the safer choice.

### Does the Cardea Zero Z340 have a DRAM cache?

Yes, the Cardea Zero Z340 includes a dedicated 1 GB DDR4 DRAM cache chip paired with the Phison PS5012-E12 controller. This is a key advantage over DRAM-less NVMe drives, which use Host Memory Buffer (HMB) to borrow system RAM for the flash translation layer. DRAM-equipped drives like the Z340 maintain more consistent random I/O performance under sustained workloads and do not consume a slice of system memory, making them preferable for operating system duties and mixed read-write scenarios where HMB-based drives can exhibit latency spikes.

### What is the TBW endurance of the 256GB Cardea Zero Z340?

The 256 GB Cardea Zero Z340 is rated for 380 TBW (terabytes written), which translates to roughly 208 GB of writes per day over the five-year warranty period. By comparison, the 512 GB model is rated for 800 TBW and the 1 TB model for 1,600 TBW. For a 256 GB boot drive, 380 TBW is ample — at a typical consumer write rate of 20–30 GB per day, the endurance budget will outlast the useful life of the drive several times over. Only users running write-heavy server or caching workloads should consider stepping up to a higher-TBW variant.

### Does the Cardea Zero Z340 need a separate heatsink?

The Cardea Zero Z340 ships with a factory-applied graphene-laminated copper foil heat spreader, which Team Group claims reduces controller temperatures by approximately 9 °C versus a bare drive. For most use cases — desktop gaming, laptop upgrades, general productivity — this integrated solution is sufficient and the drive does not need a third-party heatsink. If you are running sustained sequential writes for tens of minutes at a time (video ingest, large database rebuilds) in a chassis with poor airflow, a finned aluminium M.2 heatsink will keep temperatures lower, but the stock graphene-copper spreader is adequate for typical consumer workloads.

### How does the Cardea Zero Z340 compare to the Samsung 970 EVO Plus?

Both drives are PCIe 3.0 x4 NVMe drives with DRAM caches, making them direct competitors for boot-drive duties. The Samsung 970 EVO Plus uses Samsung's in-house Phoenix controller and 92-layer 3D TLC V-NAND, with rated speeds of 3,500 MB/s read and 3,300 MB/s write for the 250 GB variant — slightly faster on writes than the Z340's 3,000 MB/s. The 970 EVO Plus 250 GB carries a lower 150 TBW endurance rating versus the Z340's 380 TBW, but Samsung's broader brand recognition and firmware maturity give it an edge in perceived reliability. In practice, the two drives are close enough that pricing, warranty length, and whether the ultra-thin Z340 cooler matters for your build should drive the decision.

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Last updated: 2026-05-17. Source: https://ssdrive.net/team-group-cardea-zero-z340-256-gb