ASRock X870 RIPTIDE - Lane Sharing?

[Mr.Amorphous]

Hey TPU; just looking for some solid information regarding the new Asrock x870 Riptide board I ordered, and the possibility of it using PCI-E lane sharing from the GPU slot. The manufacturers website does not indicate any lane sharing from the GPU slot whilst using the NVME slots. Though since I believe this board is using a single Prom 21 chipset VS the "E" variants of the AM5 boards that provide dual Prom 21 chips; I am under the assumption that if I populate all the provided NVME slots, that it will most likely cut my GPU lanes down from x16 to x8. I have noticed there are some board variants on the market that have the single Prom 21 chipset, and will disable the secondary PCI-E slot, rather than limit the full x16 lane usage from the primary PCIE.

Just hoping for some clarification on what this specific board does when handling all 3 NVME slots; or if I will need to run only 2 of 3 NVME slots to maintain my full x16 PCIE lanes.


This build will be utilizing the following hardware
Asrock X870 Riptide Wifi
AM5 R9 7950X3D
RTX 4080 Super
G.Skill Flare X5 6000 16GBx2
MSI Spatium M480 2TB
(2x) Adata SX8200 1TB
ROG Strix 1000w Gold PSU
Misc. Crucial SSD's (storage)

 

[Super Firm Tofu]

Using all three M.2 Slots won't cause lane sharing from the first PCIe slot. It will remain a full x16.

Filling all of the M.2 (specifically M2_3) will disable the second PCIe slot on the board. It is a x4 slot electrically.

 

[Mr.Amorphous]

Perfect! Thank you for the quick reply; I'm very happy I don't have to sacrifice anything important, as I don't have any plans to use the second PCIe slot.

 

[PenguinBelly]

On top of that Gen5 x8 lanes will not hurt GPUS, like at all. I know there are benchmarks showing tiny but repeatable differences, but in real life my 3060 Ti running on x8 is near the top of 3DMark Steel Nomad leaderboard. (among 3060 Ti's)

 

[eidairaman1]

I just go on the motherboard makers page and get their manual and read it before buying it

 

[kapone32]

I just go on the motherboard makers page and get their manual and read it before buying it

That is how I learned how deceptive the X870E Carbon is.

 

[eidairaman1]

That is how I learned how deceptive the X870E Carbon is.

Rtfm is a must for anything

 

[DaaQ]

Using all three M.2 Slots won't cause lane sharing from the first PCIe slot. It will remain a full x16.

Filling all of the M.2 (specifically M2_3) will disable the second PCIe slot on the board. It is a x4 slot electrically.

View attachment 366406

Will this run the 2nd PCIE2 slot at x4 as long as m2_3 is not used? But then NVME RAID would be disabled correct? I want to use a PCIEx1 soundcard, which the Nova "seems" to the board for it. BTW I have a 4x ssd RAID0 array because the drives were bought back when 128 for just under 100 was a good deal. Yea like 10 years ago. Was hoping to keep that for OS, or just get 2 M.2 4TB and raid0 them.

Easier on the wallet to get 2 than 1 8TB m.2

Thanks.