# PNY XLR8 CS3250 1TB Review — PCIe 5.0 NVMe SSD (2026)

The PNY XLR8 CS3250 1TB is one of the first Phison E28-powered PCIe 5.0 SSDs to reach retail, delivering manufacturer-rated sequential reads of 14,900 MB/s in the standard M.2 2280 form factor.

Quick answer: The PNY XLR8 CS3250 1TB suits builders on a Ryzen 7000/9000 or Intel 12th-gen or later platform who want to fully exploit a PCIe 5.0 M.2 slot without paying a heatsink premium — the thermal-coated controller and standard M.2 2280 form factor keep it versatile. Buyers who run sustained heavy write workloads (video rendering, large backup jobs) should plan for active airflow or a third-party heatsink, since the drive ships bare and PCIe 5.0 controllers run warm under load. If the platform is PCIe 4.0, the Crucial T705 or WD Black SN850X deliver similar real-world responsiveness at lower cost and with more established review coverage. The CS3250 makes the most sense for users who have confirmed a Gen5 slot, prioritise sequential throughput, and want PNY's 5-year warranty safety net without paying extra for a bundled heatsink.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 1 TB |
| Interface | M.2 5.0 x 4 |
| Controller | Phison E28 |
| Memory type | 3D 218-Layer TLC |
| DRAM cache | Yes |
| Sequential read | 14900 MB/s |
| Sequential write | 13500 MB/s |
| Random read IOPS |  |
| Random write IOPS |  |
| Endurance | 600 TBW |
| MTBF | 1.5 |
| Warranty | 5 years |

## Performance

The PNY XLR8 CS3250 1TB is rated by the manufacturer at up to 14,900 MB/s sequential reads and 13,500 MB/s sequential writes — numbers that reflect the theoretical headroom of PCIe 5.0 x4, which provides roughly double the bandwidth ceiling of PCIe 4.0 x4. PNY has not published official random IOPS figures for this drive; independent benchmark testing at 4K Q32T16 depth shows roughly 1.4 million read IOPS and 820,000 write IOPS, though those figures are workload-dependent and will vary with queue depth and block size.

In practice, the step-up from a good PCIe 4.0 drive is most visible in large-file sequential transfers: video editors moving uncompressed 4K or 8K footage, game library copies, and DirectStorage-enabled titles that stream asset data directly from the drive to the GPU. For OS boot, application launch, and typical gaming loads, the difference over a flagship PCIe 4.0 SSD narrows considerably — the bottleneck shifts to software and memory latency rather than storage throughput. Like all high-density TLC SSDs, the CS3250 leverages an SLC write cache; once that cache fills under prolonged sequential writes the sustained throughput drops, though the large DRAM buffer helps minimise the impact compared to cache-less designs. Independent reviewers note that real-world game load times improve by several seconds over PCIe 4.0 equivalents, with the gap widening as DirectStorage adoption grows.

## Endurance, TBW & Warranty

PNY backs the CS3250 with a 5-year limited warranty, consistent with the rest of its XLR8 NVMe lineup. The warranty is either time-based or TBW-limited, whichever comes first — PNY does not publicly list the exact TBW figure for the 1TB capacity in its current marketing materials, and independent sources report varying figures. At a typical consumer write workload of 20–40 GB per day, even the lower estimates cited by reviewers represent decades of practical use before endurance becomes relevant for mainstream buyers. The MTBF rating stands at 1.5 million hours, a population-level reliability figure that reflects PNY's confidence in the Phison E28 platform under normal operating conditions. Warranty service is handled through PNY directly; their lifetime technical support is included alongside the standard return process. The drive ships without a heatsink, which is relevant to warranty considerations — running without adequate airflow in a thermally constrained slot may affect long-term component health, even if it does not void the warranty per se.

## Pros and Cons

**Pros:**

- 14,900 MB/s sequential reads on PCIe 5.0 x4
- Phison E28 controller on 6nm process
- 2GB Hynix LPDDR4 DRAM cache
- M.2 2280 form factor — no heatsink, fits most slots
- 5-year limited warranty with lifetime tech support
- MTBF rated at 1.5 million hours
**Cons:**

- No bundled heatsink — PCIe 5.0 controller runs hot under sustained load
- 1TB write speed (13,500 MB/s) trails the 2TB SKU (14,000 MB/s)
- PCIe 5.0 slot required — negligible gain over PCIe 4.0 for gaming alone
- PNY does not publish IOPS or TBW specs for the 1TB model


## Verdict

The PNY XLR8 CS3250 1TB suits builders on a Ryzen 7000/9000 or Intel 12th-gen or later platform who want to fully exploit a PCIe 5.0 M.2 slot without paying a heatsink premium — the thermal-coated controller and standard M.2 2280 form factor keep it versatile. Buyers who run sustained heavy write workloads (video rendering, large backup jobs) should plan for active airflow or a third-party heatsink, since the drive ships bare and PCIe 5.0 controllers run warm under load. If the platform is PCIe 4.0, the Crucial T705 or WD Black SN850X deliver similar real-world responsiveness at lower cost and with more established review coverage. The CS3250 makes the most sense for users who have confirmed a Gen5 slot, prioritise sequential throughput, and want PNY's 5-year warranty safety net without paying extra for a bundled heatsink.

## Frequently Asked Questions

### Is the PNY XLR8 CS3250 1TB good for gaming?

Yes, with a practical caveat. The CS3250 1TB delivers 14,900 MB/s sequential reads — fast enough to take full advantage of DirectStorage, which streams compressed game assets directly from the SSD to the GPU. In titles that support DirectStorage, load times improve noticeably over PCIe 4.0 drives. For conventional games, the improvement over a good PCIe 4.0 NVMe is modest, typically a few seconds per load. If your motherboard has a PCIe 5.0 slot and you play games with DirectStorage support, the CS3250 is a strong choice. If the platform is PCIe 4.0, a drive like the Crucial T705 or WD Black SN850X will cover gaming needs at lower cost.

### Does the PNY XLR8 CS3250 need a heatsink?

PNY ships the CS3250 without a bundled heatsink. The controller carries a thermal coating that helps manage heat passively, but under sustained writes — long file copies, video encoding output, large backup jobs — the Phison E28 controller runs warm enough to throttle without supplemental cooling. Most Z790 and X670E motherboards include an M.2 thermal pad or heatsink cover over the primary slot, which is usually sufficient. If your board lacks an M.2 thermal pad or you plan to install the drive in an exposed secondary slot, adding a third-party heatsink is worth considering. For gaming and typical desktop use, the thermal coating alone is generally adequate.

### Is the PNY XLR8 CS3250 1TB compatible with the PS5?

The CS3250 uses the M.2 2280 form factor and PCIe 5.0 x4 interface. Sony's PS5 M.2 expansion slot accepts M.2 2280 drives with a PCIe 4.0 or PCIe 5.0 interface and a sequential read speed of at least 5,500 MB/s. The CS3250 meets all those criteria on paper, with its 14,900 MB/s read rating comfortably exceeding the minimum. Sony does not maintain a model-by-model compatibility list beyond the dimensional and speed requirements. The drive fits within the PS5's physical slot dimensions. Note that the PS5 slot has no active cooling, so the CS3250's thermal-coated-but-heatsink-free design is actually better suited to PS5 installation than a bulky external heatsink would be.

### Does the PNY XLR8 CS3250 have a DRAM cache?

Yes. The CS3250 is equipped with a 2GB Hynix LPDDR4-4266 DRAM cache, which the Phison E28 controller uses to store the drive's logical-to-physical address mapping table. A dedicated DRAM cache improves random access performance and reduces latency compared to HMB-only designs, where that mapping table resides in system RAM over the PCIe bus. The 2GB allocation is appropriate for a 1TB drive — the rule of thumb for DRAM-buffered SSDs is roughly 1–2GB of cache per terabyte of NAND.

### What is the TBW endurance of the PNY CS3250 1TB?

PNY does not publicly list the TBW endurance figure for the CS3250 1TB on its official product page, which is unusual for a drive at this price point. Independent sources have cited figures ranging from 600 to 700 TBW, though some aggregator sites show higher estimates. Until PNY publishes an official datasheet with a confirmed number, the exact rating should be treated as unverified. What is confirmed is the 5-year limited warranty with a TBW clause — meaning the warranty ends at whichever comes first, five years of time or the rated write limit. For typical home or workstation use at 20–40 GB per day of writes, even 600 TBW equates to over 40 years of endurance.

### How does the PNY CS3250 1TB compare to the Crucial T705 1TB?

Both drives use a PCIe 5.0 x4 interface and target the same enthusiast segment, but they differ on a few practical points. The Crucial T705 is based on the Phison E26 controller rather than the newer E28, and it ships in both bare and heatsink variants with a clearly published 600 TBW rating and 1.8 million-hour MTBF. The T705 has a broader review record, making it easier to find real-world sustained-write and thermal data. The CS3250 uses the newer E28 controller (6nm vs E26's 12nm), which is more power-efficient and has a higher theoretical ceiling. For most buyers the in-practice difference is small; the T705 has the edge in documentation transparency while the CS3250 benefits from the newer controller generation.

### Is the PNY XLR8 CS3250 1TB slower than the 2TB version?

On sequential write speed, yes. PNY rates the 1TB CS3250 at 13,500 MB/s sequential writes, while the 2TB model is rated at 14,000 MB/s — a roughly 4% difference. Sequential reads are identical at 14,900 MB/s across both capacities. The write speed difference is common on TLC SSDs: larger capacities spread writes across more NAND dies in parallel, improving sustained throughput. For most workloads the difference is not meaningful, but users who regularly write very large files sequentially — 4K video masters, large database exports — will notice slightly better sustained performance on the 2TB SKU.

### What NAND flash does the PNY CS3250 use?

The CS3250 uses 3D 218-layer BiCS8 TLC NAND. BiCS8 is the eighth generation of Kioxia's and Western Digital's 3D BiCS stacking technology, offering high cell density and reasonable endurance per cell. TLC (Triple-Level Cell) stores three bits per cell, which provides a good balance of capacity, cost, and write endurance. The 218-layer count places it in the same generation as the NAND used in several 2024–2025 flagship PCIe 5.0 SSDs, including Kioxia's own Gen5 offerings.

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Last updated: 2026-07-22. Source: https://ssdrive.net/pny-xlr8-cs3250-1-tb