Samsung 990 EVO Plus vs TeamGroup Z540 at every capacity: prices, $/TB, speeds, endurance. Which to buy in July 2026 — full family comparison.
This page compares the Samsung 990 EVO Plus and TeamGroup Z540 product families across all capacities we track. Per-capacity pricing changes the verdict more often than specs do, so start with the capacity table and then check the spec differences below.
On paper, the TeamGroup Z540 family leads on sequential read (12,400 vs 7,250 MB/s). In practice, both saturate typical consumer workloads — the speed gap matters mainly for sustained multi-GB transfers.
Per-terabyte economics favor the Samsung 990 EVO Plus: $146.25/TB at its best capacity, against $164.50/TB for the TeamGroup Z540. If budget drives the decision, the Samsung 990 EVO Plus is the default.
Architecturally, the TeamGroup Z540 family uses a dedicated DRAM cache while the Samsung 990 EVO Plus relies on HMB (Host Memory Buffer). For OS and gaming duty they behave identically; sustained random writes favor DRAM.
| Capacity | Samsung 990 EVO Plus | TeamGroup Z540 | |
|---|---|---|---|
| 1 TB | $244 · $244.00/TB | $290 · $290.00/TB | Full comparison → |
| 2 TB | $369 · $184.50/TB | $329 · $164.50/TB | Full comparison → |
| 4 TB | $585 · $146.25/TB | — |