Samsung 990 EVO Plus 2TB vs SanDisk Optimus GX 7100 2TB
SanDisk Optimus GX 7100 2TB is at least the equal of the other on every measure that decides this, and ahead on at least one.
| Specification | Samsung990 EVO Plus 2TB | SanDiskOptimus GX 7100 2TB |
|---|---|---|
| Capacity (GB) | 2000 | 2000 |
| Sequential read (MB/s) | 7250 | 7250 |
| Sequential write (MB/s) | 6300 | 6900better |
| Current best price | $517.79at Amazon.ca · captured 2026-09-13 | $499.99betterat Amazon.ca · captured 2026-09-13 |
| Price per TB | $258.90 | $250.00better |
| Endurance (TBW) | 1200 | 1200 |
| Warranty (years) | 5 | 5 |
| DRAM cache | No | No |
| NAND type | tlc | tlc |
| Controller | Samsung in-house controller | — |
How these two compare
Sequential throughput
Samsung 990 EVO Plus 2TB states 7250 MB/s read and 6300 MB/s write; SanDisk Optimus GX 7100 2TB states 7250 MB/s read and 6900 MB/s write, both over PCIe. Sequential numbers like these describe large sustained transfers; the responsiveness you notice day to day tracks random access more closely than the peak figures do.
Random access
Samsung 990 EVO Plus 2TB is rated 1,000,000 IOPS random read and 1,350,000 random write; SanDisk Optimus GX 7100 2TB, 1,000,000 and 1,400,000. Random 4K access — many small, scattered operations — is what a drive does booting, launching apps and juggling everyday tasks, and it tracks that feel far more closely than the sequential figures above.
Price
Samsung 990 EVO Plus 2TB is $517.79 ($258.90 per TB); SanDisk Optimus GX 7100 2TB is $499.99 ($250.00 per TB).
Endurance
Samsung 990 EVO Plus 2TB is rated for 1200 TBW and SanDisk Optimus GX 7100 2TB for 1200 TBW — the total the maker warrants you can write over the drive's life. A typical desktop writes only a few terabytes a year, so either rating is many years of headroom; the figure matters mainly as a relative signal of how hard each is built to be driven.
DRAM cache
On the cache question: Samsung 990 EVO Plus 2TB is DRAM-less, and SanDisk Optimus GX 7100 2TB is DRAM-less. The DRAM keeps the flash-translation table close, sparing a lookup on nearly every access; a drive without it leans on host memory or its own flash, which usually shows as slower sustained random writes rather than in the headline sequential numbers.
NAND, controller and warranty
On the flash itself: Samsung 990 EVO Plus 2TB uses TLC, and SanDisk Optimus GX 7100 2TB uses TLC. NAND tiers count bits per cell — more bits pack more capacity into the same silicon but shorten write endurance and slow sustained writes, which is why QLC sits below TLC on lasting performance even when the sequential numbers match. Controller: Samsung 990 EVO Plus 2TB uses the Samsung in-house controller and SanDisk Optimus GX 7100 2TB's controller is not stated. The controller runs wear-levelling, error correction and the mapping table, so it shapes sustained and random behaviour as much as the flash does — though the model name alone predicts little without testing. Samsung 990 EVO Plus 2TB carries a 5-year warranty and SanDisk Optimus GX 7100 2TB carries a 5-year warranty — the length the maker will stand behind the drive, and usually a proxy for the endurance it is rated to.
Which to buy
Against the other, SanDisk Optimus GX 7100 2TB is even or ahead on every tracked measure and behind on none, which is the one case where the choice needs no compromise.
Common questions about this pair
- Which is faster, Samsung 990 EVO Plus 2TB or SanDisk Optimus GX 7100 2TB?
- Samsung 990 EVO Plus 2TB states 7250 MB/s read and 6300 MB/s write; SanDisk Optimus GX 7100 2TB states 7250 MB/s read and 6900 MB/s write, both over PCIe. Sequential numbers like these describe large sustained transfers; the responsiveness you notice day to day tracks random access more closely than the peak figures do.
- How do Samsung 990 EVO Plus 2TB and SanDisk Optimus GX 7100 2TB compare on random access?
- Samsung 990 EVO Plus 2TB is rated 1,000,000 IOPS random read and 1,350,000 random write; SanDisk Optimus GX 7100 2TB, 1,000,000 and 1,400,000. Random 4K access — many small, scattered operations — is what a drive does booting, launching apps and juggling everyday tasks, and it tracks that feel far more closely than the sequential figures above.
- Which costs less per terabyte, Samsung 990 EVO Plus 2TB or SanDisk Optimus GX 7100 2TB?
- Samsung 990 EVO Plus 2TB is $517.79 ($258.90 per TB); SanDisk Optimus GX 7100 2TB is $499.99 ($250.00 per TB).
- Should you buy Samsung 990 EVO Plus 2TB or SanDisk Optimus GX 7100 2TB?
- Against the other, SanDisk Optimus GX 7100 2TB is even or ahead on every tracked measure and behind on none, which is the one case where the choice needs no compromise.