Intel tends to work with SMI, hence the SM2259 in the 545s and the SM2262 in the 760p. Static SLC in both cases since these are client drives. The 660p is SM2263-based which, while having dynamic SLC as well, has a significant amount of static SLC too.
On the SATA end it should be replaced with the SM2265 while for PCIe (NVMe) the SM2264 & SM2267. Intel split from Micron with flash such that they intend to stick with floating gate while Micron and most of the industry are on charge trap (Micron's method is technically TCAT or replacement gate). Intel seems intent on coming out with 144L flash, QLC first than TLC later (the 665p uses 96L QLC; the 500GB Crucial P2 is suspected of eventually having 96L QLC from Micron). It's possible that the 96L TLC (e.g. B27A) still falls under the IMFT umbrella though so who knows.
We have seen Intel 144L QLC shown with the SM2265 but I haven't heard yet about PCIe products.
I did hear about the 144L QLC. What's the system requirement on that (both hardware and software? It seems this is not out, and I wonder what happens when the existing 760p is sold out. If intel doesn't release the replacement of 760p on time, we are forced to pick the lower end model such as 660p or another brand
The 760p is already hard to find (relatively) but it is a client drive. All the other SM2262-based drives - SX8200 Non-Pro, EX920, Pilot, etc - have large, dynamic caches in comparison to the 760p's conservative static design. Also, the 760p is single-sided at 1TB unlike all other SM2262/EN-based drives. I'm reiterating these points because it makes it a bit unique. For what it's worth, there are SM2262EN drives with 96L TLC, although I haven't seen any with IMFT TLC yet.
144L requires a new controller which as listed should be SM2264, SM2265, SM2267. The PCIe ones (SM2264 & SM2267) will be 4.0-based but will work fine in a 3.0 socket, the SM2267 will be fine in 3.0 while the SM2264 will leave performance on the table.
Not sure about Intel's plans although there are equivalent options from other vendors I suppose, SN720/SN760 from WD, Micron has proprietary controller now for PCIe, etc.
1) would the regular 2280 slot on the older motherboard able to support these new PCI e 4.0 NVMe drive? i.e., I have motherboard that has 2 NVMe slots, I can install these 760p on those 2 NVMe slots on the motherboard just fine. What would happen if we put a PCI e 4.0 NVMe drive on those 2280 slot on the motherboard
2) The reason I post this is that should we wait for PCI e 4.0 and buy the newer drive for those who uses older motherboard (1 year old). Or should we buy the existing 760p drive now?
because these SSD / NVMe drive are getting cheaper. A no. of yr. ago, I paid $400 to $500 for a 460 GB SSD drive. Now I can get it for around $130. So I hate to pay $130 for a 512GB NVMe drive today, and find out these newer PCIe 4.0 drive ends up cheaper for the same sizes drive
A 4.0 PCIe drive in a PCIe 3.0 slot will run at 3.0 speeds but should function normally for the rest.
Prices depend a lot on the demand, while you may find cheaper drives at some point that does not mean they are the fastest drives, I currently am using a Samsung 860 QVO drive with QLC nand which is slower for writes, but since it is only used to store games it is good enough for my use case, though I would not use it as a windows drive or a drive I want to write a lot of data to.
I'm very reluctant to buy the 760p. As I have make this mistake quite a few times. And ea. time, the newer drives turns out to be cheaper. Since the PCIe 4.0 drive will work at the older speed, I'll wait