PNY CS3250 2TB VS Western Digital WD Black SN8100 1TB

Both the PNY CS3250 2TB and the WD Black SN8100 1TB share an identical sequential read speed of 14900 MB/s, placing them at the very top tier of consumer NVMe performance. At this level, large file reads — such as loading game assets, transferring high-resolution video, or decompressing archives — complete in fractions of a second, with throughput that saturates even the most demanding PCIe 5.0 bandwidth available on modern platforms.

From a practical standpoint, speeds this high are most impactful in sustained, sequential workloads. For everyday tasks like OS boot times or launching applications, real-world differences at this tier are virtually imperceptible, as those scenarios are typically bottlenecked by other system factors rather than raw read throughput.

On read speed alone, these two drives are in a dead tie. Neither holds an advantage here, and a buyer choosing between them on this metric alone has no reason to favor one over the other. The decision should rest on other spec groups such as write speed, endurance, or value.

Write speed is where a meaningful gap opens up between these two drives. The PNY CS3250 2TB delivers a sequential write speed of 14000 MB/s, while the WD Black SN8100 1TB comes in at 11000 MB/s — a difference of 3000 MB/s, or roughly 27% faster in favor of the PNY.

In practical terms, this gap matters most during write-intensive operations: ingesting large raw video files, duplicating massive game libraries, or running disk-to-disk backups. At 14000 MB/s, the CS3250 can push through a 100 GB file in under 8 seconds under ideal conditions, whereas the SN8100 would take closer to 10 seconds. For professionals handling frequent large transfers, that margin compounds quickly over a workday.

The PNY CS3250 holds a clear edge in this category. While both drives are elite performers by any modern standard, the CS3250ʼs write throughput advantage is substantial enough to be tangible in real workloads — not just on paper.

At a foundational level, both drives share the same M.2 NVMe form factor, PCIe 5.0 interface, TLC NAND, and an 8-channel controller — meaning they are architected on comparable platforms. The key divergence lies in caching strategy: the WD Black SN8100 uses a dedicated DRAM cache, which provides a fast, consistent buffer for frequently accessed data, while the PNY CS3250 relies on HMB (Host Memory Buffer), borrowing a slice of system RAM instead. In practice, DRAM cache tends to deliver more predictable low-latency performance under sustained mixed workloads, giving the SN8100 a subtle but real consistency advantage in those scenarios.

Endurance tells a starkly different story. The CS3250 2TB is rated for 1400 TBW compared to just 600 TBW on the SN8100 1TB — more than double. Even accounting for the capacity difference (2TB vs 1TB), the CS3250ʼs endurance scales well above what a proportional comparison would suggest, making it a far more durable long-term choice for write-heavy environments like NAS, video editing scratch disks, or frequent large backups.

Both drives carry a 5-year warranty and neither includes a heatsink, so installation requirements are identical. Overall, the PNY CS3250 holds the broader advantage in this category thanks to its commanding endurance lead, though users prioritizing consistent latency in mixed-use workloads may find the SN8100ʼs DRAM cache architecture appealing despite the lower TBW rating.