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It must be that 3-bit MLC always requires a write cache in the NAND. Once the write cache fills, the performance decreases until the cache is flushed. In this w
by 55873445216111 6y ago
It must be that 3-bit MLC always requires a write cache in the NAND. Once the write cache fills, the performance decreases until the cache is flushed. In this way, the new 980 PRO is really more like an EVO drive. The 970/960 PRO used 2-bit MLC which doesn't use a cache and therefore has consistent write performance across the drive. In addition, 2-bit MLC will have better endurance than 3-bit. In this way it does look like 980 PRO is a regression.
- vbezhenar 6y ago970 Pro uses DRAM cache.
- wmf 6y agoWe're talking about SLC caching in the flash itself in addition to any DRAM cache. The advantage of SLC cache is temporarily faster writes but the disadvantage is that write performance is variable.
- Godel_unicode 6y agoI believe gp meant that the 970 uses a DRAM cache _only_. Unlike in the 980 pro or 970 evo, there is no SLC cache which can be exhausted. Full drive writes at full speed have always been a strength of the 9x0 pro drives, until now. https://www.extremetech.com/computing/268254-samsung-launches-new-970-evo-and-970-pro-ssds https://www.extremetech.com/computing/268254-samsung-launche...