PCIe SSDs slowly replacing SATA3 SSD
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Evildead666
https://www.howtogeek.com/165542/why-solid-state-drives-slow-down-as-you-fill-them-up/
Link to explanation of why ssd's get slower as you fill them up.
MLC and TLC also have this problem.
Its due to the number of memory channels iirc.
There are generally 8 memory channels per ssd, and when you fill up half the drive, you basically lose half of the controllers, because those chips are full.
edit : Its actually because when near full, you have partially filled sectors in the flash chips, and to fill that flash up, it has to copy the actual data, add the new data, and write back. A lot more than just writing.
The problem is only with writes iirc, although I could be wrong.
Reads should be just fine, no matter how much the drive is full.
edit : zig11727
I use SATA SSD's in a caddy system on my PC this way I have separate SATA ssd's with different builds of Windows. This wouldn't be possible with M2 SSDs
Luc
Now, I don't need another M.2 NVMe, mine is fast and big enough, but my other storage needs are based on reliability, density and price, as my 3 HDD, and none of them saturates a Sata 3 connection, nor a dvd reader does.
So, if we are planning on gaming or working on budget, I don't get why we need so many NVMe. If the answer is yes we need it, then there exist HEDT platforms with many M.2 slots, where to throw the money.
For me the balance is having an ultra fast drive for the OS, programs and on course workloads, and many other many TB big storage discs for data that will last the more the better, and save enough money for the rest of HW, SW, taxes, food, etc.
My case and opinion.
PS: AM4 platform always keeps 4x lanes for M.2 from the CPU reserved.
schmidtbag
Luc
schmidtbag
mbk1969
Devin Johnel Goss
Devin Johnel Goss
mbk1969
Dribble
EspHack
i wonder how much software progress we need before nvme shows a substantial improvement over sata3
ssd are now only twice as expensive, 1tb hdd is around 50$ vs 90-110$ for ssd, we are almost there...
D3M1G0D
I don't particularly care if it's PCIe or SATA, I just like the M.2 form factor.
Devin Johnel Goss
r3claim3r
Nothing wrong with SATA 3, if the most you're doing is gaming. My 4 TB Samsung 860 Evo does just fine.
fredgml7
Sata 3.0 SSDs are good enough to me performance wise, but I'm considering to buy a NVMe just for boot drive when I upgrade (price will tell).
RzrTrek
They both work just as fine for regular use and gaming, but there are obviously more benefits with the smaller form factor and not having to use 2 cables for every drive.
Devin Johnel Goss
FatBoyNL
Devin Johnel Goss