PNY XLR8 CS3140 2TB Review — High-Capacity PCIe 4.0 Flagship
The PNY XLR8 CS3140 2TB is the high-capacity variant of PNY's Phison E18-powered flagship PCIe 4.0 NVMe SSD, delivering 7,500 MB/s reads and 6,850 MB/s writes with 1,540 TBW endurance.
The PNY XLR8 CS3140 2TB pairs a Phison PS5018-E18 controller with Micron 3D TLC NAND and SK Hynix DDR4 DRAM cache in the standard M.2 2280 form factor. At 2TB, the drive hits higher write speeds than the 1TB model — 6,850 MB/s vs 5,650 MB/s — thanks to more NAND channels operating in parallel.
The CS3140 line is available in 1TB and 2TB capacities. The Phison E18 is one of the most proven PCIe 4.0 controller designs, powering flagship drives from Corsair, Gigabyte, Seagate, and others. PNY's implementation delivers competitive performance without premium branding markup.
The 2TB capacity makes this drive suitable for power users, content creators, and gamers with large libraries. The 1,540 TBW endurance rating — double the 1TB model's — means write-heavy workflows won't stress the drive.
PNY offers a heatsink variant of the CS3140, which is particularly valuable for PS5 compatibility. Sony's PlayStation 5 requires a heatsink on any M.2 expansion drive.
Direct competitors include the Samsung 980 Pro 2TB, WD Black SN850X 2TB, Corsair MP600 Pro 2TB, and Seagate FireCuda 530 2TB.
✅ Storage Comparisons:
🚀 Performance and benchmarks
The PNY XLR8 CS3140 2TB is rated at up to 7,500 MB/s sequential reads and 6,850 MB/s sequential writes. The 7,500 MB/s read speed sits near the practical ceiling of PCIe 4.0 x4. The 6,850 MB/s write speed is among the fastest any PCIe 4.0 drive achieves — only a handful of drives exceed this figure.
PNY XLR8 CS3140 2 TB vs M.2 4.0 x 4 peers
Switch between sequential throughput and random IOPS to see how this drive stacks up against other M.2 4.0 x 4 SSDs in our database. The highlighted bar is the drive on this page — click any other bar to open that drive.
- PNY XLR8 CS3140 2 TB (this drive): 7,500 MB/s read, 6,850 MB/s write
- PNY XLR8 CS3140 1 TB: 7,500 MB/s read, 5,650 MB/s write
- Asgard AN4 512 GB: 7,500 MB/s read, 5,500 MB/s write
- Asgard AN4 1 TB: 7,500 MB/s read, 5,500 MB/s write
- Asgard AN4 2 TB: 7,500 MB/s read, 5,500 MB/s write
The 2TB capacity's advantage over the 1TB model is most visible in write performance. Where the 1TB tops out at 5,650 MB/s writes, the 2TB hits 6,850 MB/s — a 21 percent improvement from having more NAND dies operating in parallel.
In independent testing, the CS3140 delivered consistent performance across benchmark suites. Tom's Hardware described it as a competent drive with strong all-around results. The SK Hynix DDR4 DRAM cache provides consistent random 4K performance and better sustained writes compared to DRAM-less alternatives.
The SLC cache on the 2TB model is dynamic and scales with free capacity. On a 2TB drive, the pseudo-SLC buffer can exceed 400 GB. Once exhausted, sustained direct-TLC writes on the Phison E18 platform typically land in the 1,500–2,000 MB/s range.
Thermally, the CS3140 2TB runs warm under sustained loads. The Phison E18 is a power-hungry controller, and a heatsink is recommended for desktop installations. PNY's heatsink variant is PS5-compatible.
🖥️ Endurance and warranty
PNY covers the CS3140 2TB with a 5-year limited warranty and a 1,540 TBW endurance rating — double the 1TB model's 770 TBW. At 1,540 TBW, you could write roughly 843 GB per day across the five-year warranty period. For a typical desktop workload of 20–50 GB per day, the drive would last 84 to 211 years. The 5-year warranty matches the industry standard for flagship consumer SSDs.
📊 Specs
| Category | Value |
|---|---|
| Capacity [?] | 2 TB |
| Interface [?] | M.2 4.0 x 4 |
| Controller [?] | Phison PS5016-E18-41 |
| Memory type [?] | Micron 3D TLC |
| DRAM [?] | SK Hynix DDR4 1600 |
| Read speed (MB/s) [?] | 7500 |
| Write speed (MB/s) [?] | 6850 |
| Read IOPS [?] | n/a |
| Write IOPS [?] | n/a |
| Endurance (TBW) [?] | n/a |
| MTBF (million hours) [?] | 2 |
| Warranty (years) [?] | 5 |
Conclusion
The PNY XLR8 CS3140 2TB is a flagship PCIe 4.0 SSD that delivers near-maximum performance with the added benefit of 2TB capacity. The 6,850 MB/s write speed puts it among the fastest PCIe 4.0 drives available. The 5-year warranty and 1,540 TBW endurance provide peace of mind. The heatsink variant makes it PS5-ready. For power users and content creators, the CS3140 2TB is a compelling alternative to more expensive flagship drives.
+ Pros
- 7,500 MB/s reads, 6,850 MB/s writes — near PCIe 4.0 maximum
- SK Hynix DDR4 DRAM cache
- 5-year warranty with 1,540 TBW endurance
- Heatsink variant available — PS5-ready
- 2TB capacity for large libraries
- Cons
- Pricing not always competitive in the E18 segment
- Runs warm without heatsink
- Phison E18 platform is aging vs newer controllers
- No hardware encryption on some firmware versions
🛒 Buy this or similar SSD Storage:
✨ Video Review
PNY XLR8 CS3140 1TB M.2 NVMe Review + Benchmarks
