Samsung 9100 Pro 8TB VS Western Digital WD Black SN8100 1TB

In sequential read performance, these two drives are essentially neck and neck. The WD Black SN8100 1TB edges ahead at 14900 MB/s versus 14800 MB/s for the Samsung 9100 Pro 8TB — a difference of just 100 MB/s, which is less than 1% and completely imperceptible in any real-world workload. Both drives operate at the cutting edge of current PCIe Gen 5 throughput, meaning large sequential transfers such as copying massive video files or loading large game assets will feel identical on either drive.

Where a more meaningful gap emerges is in random read performance. The Samsung 9100 Pro 8TB pulls ahead significantly here with 2,200,000 IOPS compared to the SN8100's 1,600,000 IOPS — a 37.5% advantage. Random IOPS matters far more than sequential speed in day-to-day computing: OS responsiveness, application launch times, database queries, and multitasking all depend on how quickly a drive can handle a flood of small, scattered read requests. This is where the 9100 Pro's advantage would actually be felt by users.

Overall, while both drives are evenly matched on sequential reads, the Samsung 9100 Pro 8TB holds a clear and practically significant edge in random read performance. Users running demanding workloads — virtualization, heavy multitasking, or professional applications — would benefit from that higher IOPS ceiling, making the 9100 Pro the stronger performer in this group.

Sequential write speed is where the Samsung 9100 Pro 8TB asserts a decisive lead. At 13400 MB/s versus the SN8100 1TB's 11000 MB/s, the 9100 Pro is roughly 22% faster when pushing large amounts of data — think exporting 4K or 8K video timelines, writing large backups, or transferring substantial files between drives. That gap is wide enough to translate into noticeable time savings in sustained write-heavy workflows.

On random writes, both drives are closer together but the 9100 Pro still holds a modest edge: 2,600,000 IOPS versus 2,400,000 IOPS for the SN8100 — an 8% difference. In practice, random write IOPS governs performance in scenarios like compiling large codebases, writing to databases, or running virtual machines. The gap here is real but less dramatic, meaning the SN8100 remains competitive for most general workloads while trailing in more intensive write scenarios.

Taken together, the Samsung 9100 Pro 8TB holds a clear advantage across both write metrics in this group. The sequential gap is particularly significant for content creators and professionals who regularly move or generate large files, while the random write lead adds further weight to the 9100 Pro's case for demanding, write-intensive environments.

PassMark's storage benchmark is a composite score that blends sequential and random read/write performance into a single number, making it a useful at-a-glance indicator of overall real-world drive capability. The Samsung 9100 Pro 8TB scores 82,109 against the WD Black SN8100 1TB's 79,571 — a difference of roughly 3.2%.

A gap of that magnitude is statistically meaningful enough to confirm the 9100 Pro as the faster drive in aggregate, but narrow enough that no user would feel it in typical daily use. Where composite benchmarks like PassMark are most useful is in validating whether a drive's individual spec claims hold up across a mixed workload — and here, both drives score exceptionally high, firmly placing them in the top tier of consumer NVMe performance.

The Samsung 9100 Pro 8TB takes the edge in this group, consistent with its leads in sequential and random write speed seen elsewhere. That said, the margin is slim enough that the SN8100 1TB is in no way a lesser performer — the benchmark essentially confirms these two drives are peers, with the 9100 Pro holding a slight but consistent overall advantage.

At a foundational level, these two drives share the same modern architecture: both are M.2 NVMe 2.0 SSDs running on PCIe 5.0 with DRAM cache, TLC NAND, and 8 controller channels. That common platform explains why their raw performance figures are so competitive. The meaningful differences in this group lie elsewhere — in capacity, endurance, and reliability ratings.

The most obvious divergence is storage size: the Samsung 9100 Pro offers 8TB versus the SN8100's 1TB, which naturally cascades into the endurance figures. The 9100 Pro's 4800 TBW versus the SN8100's 600 TBW looks dramatic, but both are proportional to their respective capacities — so neither drive is inherently more durable per gigabyte. What does stand out is the SN8100's slightly higher MTBF of 1.8 million hours compared to the 9100 Pro's 1.5 million hours, suggesting WD rates its drive with a marginally higher long-term reliability ceiling, though both figures are well beyond what any consumer workload would realistically stress.

Both drives carry a 5-year warranty and use proprietary or third-party controllers — Samsung's in-house Presto chip versus Silicon Motion's SM2508 — a distinction that rarely affects end users directly but reflects Samsung's deeper vertical integration. For most buyers, the choice in this group comes down to capacity need: the 9100 Pro is the clear pick for high-volume storage, while the SN8100 1TB is purpose-built for users who need a fast, compact primary drive without the premium of high capacity.