03-10-2021
06:26 AM
- last edited on
03-05-2024
01:58 AM
by
ROGBot
08-10-2021 09:12 PM
08-11-2021 04:28 AM
jincuteguy wrote:
But I see other AMD AM4 with 4 x NVME slots, like the B550 ProArt Creator board from Asus. HOw would that work?
08-11-2021 04:51 AM
ctwilson77 wrote:
I am not familiar with that motherboard and chipset so you will need to research it yourself. However, I gave the specs a quick glance and it looks like it only has 2 NVMe slots. Also, it only has two PCIe 4 slots that are connected to the CPU. If you use both slots they are x8. The chipset slots are PCIe 3.
If you really want lots of PCIe 4 lanes for graphics and NVMe you may have to bump up to a Threadripper cpu and motherboard. You would need to do some research to make sure it can be configured the way you want.
08-12-2021 03:36 AM
08-12-2021 03:58 AM
jincuteguy wrote:
Im still confused about how many PCIE lanes. All I know is the 5900X cpu has 24 PCIE lanes, and how many does the X570 chipset have?
08-13-2021 05:25 AM
ctwilson77 wrote:
https://www.guru3d.com/articles-pages/amd-ryzen-9-5900x-and-5950x-review,3.html
Ryzen 5000 series processors have 24 lanes of PCIe 4.0
4 are for the chipset interconnection
20 available for other uses
16 lanes are intended for graphics cards that are connected as x16 or 2 by x8
4 lanes are intended for fast storage such as NVMe SSDs
AMD X570 chipset provides an additional 16 lanes of PCIe 4.0
4 x4 lane PCIe 4 interfaces
08-16-2021 05:43 AM
jincuteguy wrote:
So the X570 chipset gives 16lanes of PCIE 4.0. Is that mean I can have 4 x PCIE 4.0 NVME ssds?
Or is the NVME PCIE 4.0 is only from the CPU?
04-21-2023 09:44 AM
Hope someone can help me out with this one:
ROG Crosshair VIII Dark Hero
AMD Ryzen 9 5900X
Samsung SSD 980 pro and Sabrent Rocket Q4 plugged into the motherboard
EVGA Geforce RTX 3080Ti in PCIEX16_2
In PCIEX16_1 HYPER M.2 X16 GEN 4 CARD with 4 Crucial P3 Plus PCIe 4.0 NVMe M2. SSD (4TB)
PCIEX16_1 is set to RAID Mode in Bios as per the manual, when set to Auto only one of the SSDs will be visible.
Problem is, I can only see 2 out of the 4 SSDs. Tried a bunch of bios changes with no luck. Initially had the card in the 2nd slot, but after looking at the FAQ https://www.asus.com/se/support/FAQ/1037507/ I decided to move it to the 1st slot as based on the FAQ it should support 4/2 M2 SSD Quantity. I assume that 4/2 means 4 or 2 SSDs support, not sure if the 4 and 2 depend on anything else.
Asus support had no clue, so they escalated the issue higher and now just gotta wait... Wonder if anyone here has any ideas?
04-21-2023 10:49 AM
I think the problem you are encountering is PCIEX16_1 is operating in x8 mode because you have a GPU in PCIEX16_2 (also operating in x8 mode). As far as I can see, the Hyper M.2 cards don't have a PCIe multiplexing switch chip, they essentially just extend/bridge the motherboard lanes up to the M.2 slots on the card. So, with only 8 lanes going into the card, only two of the x4 slots can be active. The card supports 1 M.2 slot in a x4 slot, 2 in a x8 slot, and 4 in a x16 slot (the mode of the slot, not the physical size of it).
This is a limitation of the AM4 platform. There are only 24 lanes total from the CPU. 16 go to the two x16 slots for x16/0 or x8/x8 operation. 4 go to the CPU M.2 slot. 4 go to the chipset (which does do PCIe multiplexing, having up to 16 lanes coming out of it, sharing 4 lanes of bandwidth back to the CPU).
04-21-2023 08:05 PM
Thanks, looking at the manual for the motherboard https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM4/ROG_CROSSHAIR_VIII_DARK_HERO/E19368_ROG_CROSSHAIR_VI... on page 1-9 I see: PCIe 3.0 x16_1 - x4+x4+x4+x4 unless I am reading it wrong.
So it there no way to get the 4 ssds to work in my configuration? Would changing the motherboard be the only solution and if so which MB would be recommended?