Compare TeamGroup Z540 1TB and WD Blue SN5100 1TB: prices, speeds, $/TB. Which to buy in May 2026? Full spec breakdown.
TeamGroup Z540 1TB vs WD Blue SN5100 1TB pits two different generations against each other at 1 TB. The question isn't which is faster on paper — that's settled — it's whether the bandwidth gap shows up in your specific workload.
Hardware-wise, the TeamGroup Z540 1TB runs on the Phison E26 — the first widely-deployed Gen 5 controller, capable but thermally demanding. The WD Blue SN5100 1TB pairs the SanDisk controller.
Price separates these two meaningfully. The WD Blue SN5100 1TB costs $89.00/TB versus $189.00/TB for the TeamGroup Z540 1TB — a 53% premium that needs justification in real benchmarks, not just spec-sheet bragging.
Read speeds favor the TeamGroup Z540 1TB: 12,400 MB/s versus 6,600 MB/s for the WD Blue SN5100 1TB, a 47% advantage. Sequential-heavy workloads notice; transactional workloads don't.
The TeamGroup Z540 1TB writes about 54% faster (11,800 MB/s vs 5,400 MB/s). Whether that matters depends entirely on what you write to the drive — gameplay capture and large project saves benefit, browsing and gaming do not.
The TeamGroup Z540 1TB carries a dedicated DRAM chip for FTL (Flash Translation Layer) mapping; the WD Blue SN5100 1TB relies on HMB (Host Memory Buffer), borrowing 64 MB from system RAM. The practical gap shows up only under sustained random write loads.
Heading to a PlayStation 5? Both drives drop into the console's M.2 bay and report identical real-world benchmarks since the PS5 caps storage at PCIe 4.0 speeds. The WD Blue SN5100 1TB wins this matchup on $/TB. The leap from Gen 4 to Gen 5 doubles peak throughput on paper but produces single-digit-percent improvements in game load times, OS boot, and most productivity benchmarks. The WD Blue SN5100 1TB is the better default unless you have a specific workload that needs the extra lanes. Heavy write workloads — video editing, RAW photo libraries, backup operations — favor the TeamGroup Z540 1TB's 11,800 MB/s sustained write speed. Both drives use the 2280 form factor, which is too long for Steam Deck or ROG Ally — you'd need a 2230 variant if either manufacturer offers one, or a dedicated handheld-format drive instead.
Pick the TeamGroup Z540 1TB if you value meaningfully faster reads (12,400 MB/s), higher sustained writes (11,800 MB/s), and a dedicated DRAM cache chip. The TeamGroup Z540 1TB wins on $/TB because it pairs DRAM-less MAP1602 silicon with low-margin distribution. Performance is fine for OS and gaming, weaker only on sustained random writes.
Pick the WD Blue SN5100 1TB if you value the lower retail price ($89 vs $189), and better $/TB economics ($89.00/TB).