Originally Posted by EniGma1987
To me, Optane/3DXpoint needs to double capacity while cutting cost in half and then it will be something useful to the masses. NAND is just finally at that sweet spot in pricing and size that until something else can match it, nothing will replace NAND. It has enough performance to be good enough while meeting all other criteria.
As I said, capacity, I get.
But to get this cheaper price, NAND is moving to TLC, QLC, and beyond. Lower and lower write endurance, lower and lower actual performance once you run out of cache.
Optane is nearly unkillable, with far
more performance. I would like to see price come down, but being realistic, it probably won't. Samsung's Pro drives cost more than their Evos for a reason too.
Originally Posted by mothergoose729
What is the theoretical bandwidth cap on NAND flash? It seems as though every time a new PCIE standard is introduced, SSD manufactures produce a drive that saturates it immediately.
None, in theory.
NVMe as a standard (as compared to SATA/AHCI) is extremely parallel capable, and they are cached with actual DDR RAM. As long as the controller can keep up, they can just keep throwing more and more NAND at the problem until the link is maxed. We have been making RAID-like silicon for a very long time, so this is nothing new, it's all just on one little chip these days.
But this is all Seq-Read bandwidth... that isn't very real world relevant, which is why even the cheapest NVMe, such as an Intel 660p, does not feel very different from the worlds "best", like the new 4.0 drives.