SanDisk Optimus GX PRO 8100 1TB vs Western Digital WD_BLACK SN8100 1TB
Western Digital WD_BLACK SN8100 1TB is at least the equal of the other on every measure that decides this, and ahead on at least one.
| Specification | SanDiskOptimus GX PRO 8100 1TB | Western DigitalWD_BLACK SN8100 1TB |
|---|---|---|
| Capacity (GB) | 1000 | 1000 |
| Sequential read (MB/s) | 14900 | 14900 |
| Sequential write (MB/s) | 11000 | 11000 |
| Current best price | $299.99at Newegg · captured 2026-09-11 | $239.99betterat Newegg · captured 2026-09-13 |
| Price per TB | $299.99 | $239.99better |
| DRAM cache | Yes | — |
| NAND type | tlc | tlc |
How these two compare
Sequential throughput
SanDisk Optimus GX PRO 8100 1TB states 14900 MB/s read and 11000 MB/s write; Western Digital WD_BLACK SN8100 1TB states 14900 MB/s read and 11000 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.
Price
SanDisk Optimus GX PRO 8100 1TB is $299.99 ($299.99 per TB); Western Digital WD_BLACK SN8100 1TB is $239.99 ($239.99 per TB).
DRAM cache
On the cache question: SanDisk Optimus GX PRO 8100 1TB carries a DRAM cache, and the catalog does not state whether Western Digital WD_BLACK SN8100 1TB carries a DRAM cache. 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 and warranty
On the flash itself: SanDisk Optimus GX PRO 8100 1TB uses TLC, and Western Digital WD_BLACK SN8100 1TB 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. SanDisk Optimus GX PRO 8100 1TB carries a 5-year warranty and Western Digital WD_BLACK SN8100 1TB does not state one — 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, Western Digital WD_BLACK SN8100 1TB 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, SanDisk Optimus GX PRO 8100 1TB or Western Digital WD_BLACK SN8100 1TB?
- SanDisk Optimus GX PRO 8100 1TB states 14900 MB/s read and 11000 MB/s write; Western Digital WD_BLACK SN8100 1TB states 14900 MB/s read and 11000 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.
- Which costs less per terabyte, SanDisk Optimus GX PRO 8100 1TB or Western Digital WD_BLACK SN8100 1TB?
- SanDisk Optimus GX PRO 8100 1TB is $299.99 ($299.99 per TB); Western Digital WD_BLACK SN8100 1TB is $239.99 ($239.99 per TB).
- Should you buy SanDisk Optimus GX PRO 8100 1TB or Western Digital WD_BLACK SN8100 1TB?
- Against the other, Western Digital WD_BLACK SN8100 1TB is even or ahead on every tracked measure and behind on none, which is the one case where the choice needs no compromise.