i got this ssd that is supposed to do 2400 and it is doing nowhere near that, i had AHCI turned on in bios but it didnt fix it ?
ok so the ssd is running slow because it is for some reason in pcie 2x4 mode and not pcie 3 even though its in a x16 slot, idk how to change it though
What motherboard?i got this ssd that is supposed to do 2400 and it is doing nowhere near that, i had AHCI turned on in bios but it didnt fix it
motherboard is asus prime b450 plus, crystal disk mark is the appWhat motherboard?
Testing this with what application?
ok so the ssd is running slow because it is for some reason in pcie 2x4 mode and not pcie 3 even though its in a x16 slot, idk how to change it thoughWhat motherboard?
Testing this with what application?
Is this in the native M.2 port?ok so the ssd is running slow because it is for some reason in pcie 2x4 mode and not pcie 3 even though its in a x16 slot, idk how to change it though
Then I would figure the adapter is the cause.no i am using a pcie 3 adapter
but the adapter says its pcie 3Then I would figure the adapter is the cause.
Be that as it may, not all adapters are the same, or good quality.but the adapter says its pcie 3
ok so the ssd is running slow because it is for some reason in pcie 2x4 mode and not pcie 3 even though its in a x16 slot, idk how to change it though
but the motherboard says both 16 slots are pice 3Transfer mode is x4 PCIe 2.0 which is typical for the CHIPSET on a B450-based board. Adapter has no impact on this as you're bottlenecked by the chipset/PCH.
PCIe 2.0 transfers at 5 GT/s per lane, so 20 GT/s in this case, and considering 8 bits/byte and 8b/10b encoding that comes out to 2 GB/s. Overhead is at least 10%, so 1.8 GB/s at the most is expected. That would be at maximum queue depth and thread count, keeping in mind the entire chipset bandwidth is limited to that amount, which likely includes other devices (e.g. SATA).
The primary M.2 slot uses CPU lanes and would thus run at x4 PCIe 3.0. An adapter will only hit those speeds using CPU and not chipset lanes - which would mean no discrete GPU.
so if i made it so my gpu used 8 lanes instead of 16 i would have more cpu lanes to use on my ssd and then i can make it run at full speed ?Transfer mode is x4 PCIe 2.0 which is typical for the CHIPSET on a B450-based board. Adapter has no impact on this as you're bottlenecked by the chipset/PCH.
PCIe 2.0 transfers at 5 GT/s per lane, so 20 GT/s in this case, and considering 8 bits/byte and 8b/10b encoding that comes out to 2 GB/s. Overhead is at least 10%, so 1.8 GB/s at the most is expected. That would be at maximum queue depth and thread count, keeping in mind the entire chipset bandwidth is limited to that amount, which likely includes other devices (e.g. SATA).
The primary M.2 slot uses CPU lanes and would thus run at x4 PCIe 3.0. An adapter will only hit those speeds using CPU and not chipset lanes - which would mean no discrete GPU.
but the motherboard says both 16 slots are pice 3
so if i made it so my gpu used 8 lanes instead of 16 i would have more cpu lanes to use on my ssd and then i can make it run at full speed ?
ok thanks, idgi why dosent the new cpus have more than 20 lanes, they litterally only give you enough for 1 gpu and ssd and thats itSee here
There's no way to make it faster on that board unless you run no GPU at all. It doesn't bifurcate or anything else.
$$ and demand.ok thanks, idgi why dosent the new cpus have more than 20 lanes, they litterally only give you enough for 1 gpu and ssd and thats it
You can put graphics card into second PCIE x16 slot (PCIE 2.0 x4) andok thanks, idgi why dosent the new cpus have more than 20 lanes, they litterally only give you enough for 1 gpu and ssd and thats it
yeah i could but when i get a new gpu which i am gonna soon it will bottleneck it alotYou can put graphics card into second PCIE x16 slot (PCIE 2.0 x4) and
put PCIE M.2 adapter into top PCIE 3.0 x16 slot.
You'll get full speed on your M.2 drive this way. Graphics card bandwidth will suffer a bit though.
Depends on graphics card. Might not be too much.yeah i could but when i get a new gpu which i am gonna soon it will bottleneck it alot
yeah i could but when i get a new gpu which i am gonna soon it will bottleneck it alot
ok thanks, idgi why dosent the new cpus have more than 20 lanes, they litterally only give you enough for 1 gpu and ssd and thats it
are b550 chipset lanes pcie 3 or 4?GPU on x4 PCIe 2.0 is definitely pushing it a bit. TPU tested this with a 2080 Ti and found ~20% drop in FPS.
It's a B450 limitation. B550 and X570 would be fine, assuming an appropriate CPU. To be fair, your limitation isn't a big deal with the 1TB P2.
It appears to be 4.0are b550 chipset lanes pcie 3 or 4?
im not going to though like already mentioned the chipset lanes on b450 are not 3.0 they are 2.0 thats the problem lolIt appears to be 4.0
https://www.amd.com/en/chipsets/b550
But don't change the motherboard just to bump up from 3.0 to 4.0.
Right.im not going to though like already mentioned the chipset lanes on b450 are not 3.0 they are 2.0 thats the problem lol
are b550 chipset lanes pcie 3 or 4?