Lexar NM1090 Pro 1TB VS Samsung 9100 Pro 4TB

Both drives operate at the top tier of consumer NVMe performance, but the Samsung 9100 Pro holds a measurable edge across both read metrics. Its sequential read speed of 14800 MB/s versus 14000 MB/s on the Lexar NM1090 Pro represents roughly a 6% advantage — a gap that matters most when transferring very large files such as 4K/8K video assets or large game installs, where sustained throughput is the bottleneck.

The more significant differentiator is random read performance. The Samsung's 2,200,000 IOPS versus the Lexar's 1,650,000 IOPS is a ~33% lead — and random IOPS is what actually governs day-to-day responsiveness. Tasks like OS boot times, application launches, database queries, and loading open-world game levels are almost entirely random-access workloads, meaning users are far more likely to feel this gap in practice than the sequential difference.

The Samsung 9100 Pro has a clear advantage in this category. While the Lexar NM1090 Pro is by no means slow — 14000 MB/s sequential and 1.65M IOPS are still flagship-class figures — the Samsung outpaces it on both fronts, particularly in the random read metric that has the greatest real-world impact on perceived system snappiness.

Write performance is where the gap between these two drives widens considerably. The Samsung 9100 Pro achieves a sequential write speed of 13400 MB/s compared to 10000 MB/s on the Lexar NM1090 Pro — a 34% advantage that becomes tangible when ingesting large volumes of data, such as offloading RAW photo bursts, writing large VM images, or capturing high-bitrate video directly to the drive.

Random write IOPS tells a similar story. At 2,600,000 IOPS versus 1,800,000 IOPS, the Samsung leads by roughly 44% — a substantial margin. High random write throughput is critical for workloads involving frequent small file writes: think compiling large codebases, running virtual machines with active disk I/O, or operating database engines. In these scenarios, the Samsung's headroom translates directly into lower latency and more consistent performance under pressure.

The Samsung 9100 Pro wins this category decisively. The Lexar's 10000 MB/s sequential write is still a strong result by any standard, but the Samsung's lead across both metrics — especially the near-45% random write advantage — makes it the clearly superior choice for write-intensive workloads.

PassMark's storage benchmark is a composite score that aggregates sequential and random read/write performance into a single number, making it a useful at-a-glance indicator of overall real-world capability. The Samsung 9100 Pro scores 88,718 against the Lexar NM1090 Pro's 74,037 — a ~20% lead that aligns closely with the advantages already seen in the raw spec sheets.

A gap of nearly 15,000 points at this performance tier is meaningful. PassMark scores at this level are not linear in feel — drives clustered in the 70,000–90,000 range are all fast in everyday use, but the Samsung's higher composite score reflects consistently stronger performance across multiple access patterns rather than a single standout metric. That kind of across-the-board lead is harder to achieve and more representative of sustained, mixed-workload capability.

The Samsung 9100 Pro holds a clear edge here. The Lexar NM1090 Pro's score of 74,037 is competitive and places it firmly in the high-end tier, but the Samsung's 88,718 confirms its advantage as a more well-rounded performer when the full spectrum of storage tasks is taken into account.

At a foundational level, these two drives share the same architectural DNA: both are M.2 PCIe 5.0 NVMe 2.0 SSDs with DRAM cache, TLC NAND, 8 controller channels, and identical reliability ratings of 1.5 million hours MTBF with a 5-year warranty. That common ground means neither drive cuts corners on the fundamentals — the performance differences seen elsewhere in this comparison come down to execution, not architecture.

The most practical differentiator in this category is endurance. The Samsung 9100 Pro's 2,400 TBW dwarfs the Lexar NM1090 Pro's 700 TBW in absolute terms, though it is worth noting this gap is partly a function of capacity — a 4TB drive is expected to sustain more total writes. The controller choice is also noteworthy: Samsung's in-house Presto (S4LY027) is a vertically integrated solution, while the Lexar relies on the Silicon Motion SM2508, a capable third-party chip. In-house controllers typically give manufacturers tighter optimization control over their own NAND, which can contribute to more consistent behavior across workloads.

For most buyers, the shared specs here are reassuring — both drives are built on a mature, high-end platform. However, if raw endurance headroom matters (enterprise-adjacent workloads, heavy write cycles over years of use), the Samsung's absolute 2,400 TBW rating gives it a tangible long-term advantage in this category.