針對 這 NM790 視頻 有網友在底下留言, 不知是否適用 NM620 或者說所有無 DRAM 的 NVME drive? (放入 USB 外殼 壽命會減少一半?)
@shapelessed For anyone who's planning on putting it in a USB/thunderbolt enclosure - Do NOT. It's a DRAM-less SSD which uses HMB (host memory buffer) meaning it's using your PC's system memory for write cache and the lookup table. HMB does not work over USB and thunderbolt unless it has direct PCIe lanes assigned to the drive, and even then that's not a guarantee. Without HMB its nominal "1000TBW" (1TB model) endurance will get closer to half of that, or even worse.
對於任何計劃將其放入 USB/雷電外殼的人 - 請勿這樣做。它是一款無 DRAM 的 SSD,使用 HMB(主機內存緩衝區) 這意味著它使用 PC 的系統內存進行寫入緩存和查找表。HMB 無法通過 USB 和 Thunderbolt 工作,除非它有分配給驅動器的直接 PCIe 通道,但即便如此,這也不能保證。如果沒有 HMB,其標稱的“1000TBW”(1TB 型號)耐用性將接近其一半,甚至更差。
Just to clarify - Technically HMB will work over thunderbolt, but only if there's no USB hub, non-standard controller or anything like that between the SSD and your computer, meaning it has to have direct access to the tunnelled PCIe connection. The most you can have between the SSD and your computer is a PCIe switch, if you're daisy-chaining it through a thunderbolt dock.
On the other side, if you're using thunderbolt docks, you should have enough time and money to find an SSD with a DRAM cache.