# PNY XLR8 CS3250 4TB — PCIe 5.0 NVMe SSD Review (2026)

The PNY XLR8 CS3250 4TB is the highest-capacity model in PNY's PCIe 5.0 NVMe lineup, pairing Phison's E28 controller with 4TB of SanDisk BiCS8 TLC NAND to deliver up to 14,900 MB/s sequential reads and a 2,800 TBW endurance rating.

Quick answer: The PNY XLR8 CS3250 4TB is the right drive for users who need both PCIe 5.0 throughput and genuinely large capacity in a single M.2 slot — a combination that eliminates the need to juggle data between a fast boot drive and a bulky SATA or HDD storage drive. The 2,800 TBW endurance rating is substantial and gives professionals room to write heavily for years without approaching the warranty ceiling. Buyers running a PCIe 4.0 or 3.0 platform should skip this drive — it requires a PCIe 5.0 x4 slot to reach rated speeds and will fall back to PCIe 4.0 bandwidth on older motherboards. For those with the right hardware, the Samsung 9100 Pro 4TB and Crucial T705 4TB are the natural alternatives worth comparing on current street pricing; the T705 has a longer review track record and the Samsung carries a strong brand warranty, but the CS3250's newer E28 controller and competitive pricing make it a strong value proposition in the Gen5 4TB tier. The drive ships without a heatsink, so budget for motherboard-integrated cooling or a thin aftermarket heatsink if the slot lacks thermal padding.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 4 TB |
| Interface | M.2 5.0 x 4 |
| Controller | Phison E28 |
| Memory type | SanDisk BiCS8 3D TLC |
| DRAM cache | Yes |
| Sequential read | 14900 MB/s |
| Sequential write | 14000 MB/s |
| Random read IOPS | 1500000 |
| Random write IOPS | 1500000 |
| Endurance | 2800 TBW |
| MTBF | 1.5 |
| Warranty | 5 years |

## Performance

The PNY XLR8 CS3250 4TB is rated at 14,900 MB/s sequential reads and 14,000 MB/s sequential writes under PCIe Gen 5 x4 — figures that sit at the current consumer NVMe ceiling. The 4TB model's write speed matches the 2TB SKU (14,000 MB/s) and is 500 MB/s higher than the 1TB (13,500 MB/s), reflecting the greater NAND die parallelism available at higher capacities. PNY does not publish official random IOPS specifications for the CS3250; independent reviewers testing the 2TB model report figures in the 1.4-1.5 million IOPS range at 4K QD32, and the 4TB's additional NAND channels should sustain or slightly improve those numbers.

In practical terms, PCIe 5.0 throughput is most visible in large sequential workloads: 4K and 8K video ingest, DaVinci Resolve project caches, multi-layer Premiere Pro timelines, and game loading on titles that implement DirectStorage. The doubled sequential bandwidth over PCIe 4.0 condenses multi-gigabyte file transfers to seconds rather than tens of seconds. At 4TB, the drive has enough capacity to store several large game installations, a full video project, and a working OS simultaneously — a real advantage over 2TB drives that force users to shuffle data between drives.

The 4GB DRAM cache (expected, per the standard 1GB-per-1TB E28 allocation confirmed on lower capacities) means the SLC write buffer is backed by genuine address-translation memory, allowing the drive to maintain high throughput through the buffer without the degradation that affects HMB-only designs. The Phison E28's thermal coating helps prevent controller throttling under sustained writes, and independent reviewers noted only marginal throttling during extended sequential write runs on the 2TB model — the 4TB, with its larger NAND array distributing writes across more dies, should fare similarly or better in sustained-write thermal scenarios.

## Endurance, TBW & Warranty

PNY covers the CS3250 with a five-year limited warranty, subject to TBW limits. The 4TB model carries a 2,800 TBW endurance rating — the highest in the CS3250 lineup, scaling proportionally from 600 TBW on the 1TB and 1,200 TBW on the 2TB. At a typical desktop write workload of 30 GB per day, the 4TB model's endurance budget translates to roughly 255 years of use before the TBW limit is reached, which means the five-year warranty clock will expire long before endurance becomes a practical concern for almost any consumer. Even at a heavy professional workload of 300 GB per day — sustained video production, database writes, or backup operations — the drive would take over 25 years to exhaust its rated write endurance.

PNY lists MTBF at 1.5 million hours across the CS3250 lineup. MTBF is a population-level reliability statistic derived from component stress testing; it reflects the average failure rate across a large fleet of drives, not a per-unit lifespan guarantee. PNY does not publish the TBW figure on its official product page — only the warranty clause '5-Year Limited Warranty or TBW' — but the 2,800 TBW rating is documented in independent review spec tables. Warranty service is handled through PNY's standard RMA process, and PNY provides free Acronis True Image cloning software and its SSD Toolbox utility for S.M.A.R.T. monitoring, secure erase, and firmware updates.

## Pros and Cons

**Pros:**

- 14,900 MB/s sequential reads on PCIe 5.0 x4
- 14,000 MB/s sequential writes (matches 2TB SKU, 500 MB/s above 1TB)
- 4GB LPDDR4 DRAM cache — no HMB compromise
- 2,800 TBW endurance with 5-year limited warranty
- 4TB capacity — enough for game library, OS, and working projects on one drive
- MTBF rated at 1.5 million hours
- Thermal-coated controller — usable without aftermarket heatsink
**Cons:**

- Requires PCIe 5.0 x4 slot — no benefit on PCIe 4.0 or 3.0 platforms
- PNY does not publish official IOPS specs or TBW on its product page
- No included heatsink in retail box
- Runs warmer than PCIe 4.0 drives under sustained load
- 4TB Gen5 SSD pricing is premium compared to equivalent PCIe 4.0 drives


## Verdict

The PNY XLR8 CS3250 4TB is the right drive for users who need both PCIe 5.0 throughput and genuinely large capacity in a single M.2 slot — a combination that eliminates the need to juggle data between a fast boot drive and a bulky SATA or HDD storage drive. The 2,800 TBW endurance rating is substantial and gives professionals room to write heavily for years without approaching the warranty ceiling. Buyers running a PCIe 4.0 or 3.0 platform should skip this drive — it requires a PCIe 5.0 x4 slot to reach rated speeds and will fall back to PCIe 4.0 bandwidth on older motherboards. For those with the right hardware, the Samsung 9100 Pro 4TB and Crucial T705 4TB are the natural alternatives worth comparing on current street pricing; the T705 has a longer review track record and the Samsung carries a strong brand warranty, but the CS3250's newer E28 controller and competitive pricing make it a strong value proposition in the Gen5 4TB tier. The drive ships without a heatsink, so budget for motherboard-integrated cooling or a thin aftermarket heatsink if the slot lacks thermal padding.

## Frequently Asked Questions

### Is the PNY XLR8 CS3250 4TB good for gaming?

Yes, with a practical caveat. The CS3250 4TB delivers 14,900 MB/s sequential reads, which is the current consumer peak and directly benefits DirectStorage-enabled titles by cutting asset decompression times. For games that have not yet adopted DirectStorage, the improvement over a fast PCIe 4.0 drive is narrower — both generations handle loading and OS responsiveness similarly at that point. The 4TB capacity is the real gaming advantage here: it is large enough to install 40 to 80 modern AAA titles (at 50-100 GB each) alongside the OS and still have headroom, eliminating the need for a secondary storage drive. If your motherboard has a PCIe 5.0 slot and your library includes DirectStorage titles, the CS3250 4TB is a strong choice. If the platform is PCIe 4.0, a drive like the WD Black SN850X 4TB covers gaming needs at a lower price point.

### Does the PNY XLR8 CS3250 4TB work in a PS5?

The CS3250 physically fits the PS5's M.2 2280 slot and operates on PCIe Gen 5, which is backward-compatible with the PS5's PCIe 4.0 requirement. It exceeds Sony's published minimum read speed of 5,500 MB/s by a wide margin at 14,900 MB/s. Sony does not maintain a model-by-model compatibility list beyond dimensional and speed requirements, but the CS3250 meets every published specification criterion. A slim aftermarket heatsink is strongly recommended to stay within Sony's 11.25 mm height clearance with heatsink attached. No heatsink is included in the retail box. Note that the PS5 will run the drive at PCIe 4.0 speeds, not PCIe 5.0 — you will not see the full 14,900 MB/s throughput in a PS5, but the drive will still comfortably exceed the console's requirements.

### Does the PNY XLR8 CS3250 4TB have a DRAM cache?

Yes. The 4TB model is expected to include 4GB of LPDDR4 DRAM — 1GB per 1TB of storage, matching the standard Phison E28 allocation pattern confirmed on the 1TB (1GB) and 2TB (2GB) models. Tom's Hardware spec table lists 4GB for the 4TB SKU. A dedicated DRAM cache handles the controller's logical-to-physical address translation in fast on-board memory, improving random access performance and sustained write consistency compared to HMB-only designs that must borrow host RAM over the PCIe bus.

### What is the TBW endurance of the PNY CS3250 4TB?

The CS3250 4TB carries a 2,800 TBW (terabytes written) endurance rating, documented in independent review spec tables. This is the highest in the CS3250 lineup and scales proportionally from 600 TBW on the 1TB and 1,200 TBW on the 2TB. At a moderate 30 GB per day write rate, the 4TB model's endurance budget lasts over 250 years before TBW is exhausted. Even at a heavy professional workload of 300 GB per day, the drive would take over 25 years to hit the endurance ceiling. PNY does not publish the TBW figure on its official product page — only the clause '5-Year Limited Warranty or TBW' — so the warranty clock (five years) will almost certainly expire long before the endurance budget does under any realistic consumer workload.

### Does the PNY XLR8 CS3250 4TB need a heatsink?

Not strictly, but it benefits from one under sustained loads. PNY applied a thermal coating directly to the Phison E28 controller to reduce peak temperatures without a bulky integrated heatsink, and independent reviewers noted the 2TB model runs cooler than some early PCIe 5.0 drives from prior generations. The 4TB model, with its larger NAND array distributing writes across more dies, should generate similar or slightly lower thermal density per die. In open desktop cases with adequate airflow, the thermal coating alone is generally adequate. In thermally constrained environments — tight ITX cases, laptops, or PS5 installations — a thin M.2 heatsink is worthwhile. Most modern Z790 and X670E motherboards include an M.2 thermal pad or heatsink cover over the primary slot, which is usually sufficient.

### How does the PNY CS3250 4TB compare to the Crucial T705 4TB?

Both drives use PCIe 5.0 x4 with a DRAM cache and target the same enthusiast 4TB tier. The CS3250 uses the newer Phison E28 controller (6nm process) with SanDisk BiCS8 218-layer TLC; the T705 is built on the Phison E26 (12nm process) with Micron B58R TLC. Rated sequential speeds are nearly identical: 14,900 MB/s reads and 14,000 MB/s writes on the CS3250 versus 14,800/14,000 MB/s on the T705. The T705 has a longer retail history and broader benchmark data from independent reviewers, while the CS3250 benefits from the newer, more power-efficient E28 controller and typically launches at a lower street price. Either drive is a sound choice; the decision typically comes down to current pricing and availability at the time of purchase.

### Is the PNY XLR8 CS3250 4TB faster than the 1TB and 2TB versions?

On sequential writes, the 4TB matches the 2TB at 14,000 MB/s — both are 500 MB/s faster than the 1TB's 13,500 MB/s. Sequential read speeds are identical across all three capacities at 14,900 MB/s. The write speed difference comes from NAND die parallelism: higher-capacity drives have more dies available to write to simultaneously, which improves sustained throughput. TBW endurance scales with capacity: 600 TBW for 1TB, 1,200 TBW for 2TB, and 2,800 TBW for 4TB. If your workload involves heavy sustained sequential writes — video rendering, database exports, large backup jobs — the 4TB and 2TB models are the stronger performers.

### What NAND flash does the PNY CS3250 4TB use?

The CS3250 uses SanDisk BiCS8 3D TLC NAND across all capacities. BiCS8 is the eighth generation of Kioxia's and Western Digital's 3D BiCS stacking technology, running at 3200 MT/s. TLC (Triple-Level Cell) stores three bits per cell, providing a balance of capacity, cost, and write endurance. The 218-layer count places it in the same NAND generation used in several 2024-2025 flagship PCIe 5.0 SSDs. PNY does not disclose the exact die count on the 4TB PCB, but the proportional TBW scaling (2,800 TBW at 4TB versus 1,200 TBW at 2TB) suggests the full NAND complement is populated.

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Last updated: 2026-07-22. Source: https://ssdrive.net/pny-xlr8-cs3250-4-tb