AMD CPU's Supporting 56 or more Gen4 PCIe Lanes ?

[Bint Box]

Hi,

Would anyone please be able to advise me on a point re AMD CPU's?
I have never used an AMD based machine for at least 10 years so am out of touch with their CPU specs.

I wish to find out if there are any AMD CPU's that can support 56 or more Gen4 PCIe lanes.
A quick google suggests that it might only be the Threadrippers?

I am not too bothered about the core count, 6 is OK but if more then also OK.


Thx for any advice
Bintos

 

[Cyber-Mav]

gonna have to be threadripper

 

[Armageus]

For AMD this would be threadripper (64 PCIE), threadripper pro and EPYC (128 PCIE)

Even for Intel the situation is similar, you would need Xeon W-33xx or similar to get 64 PCI-E

 

[Rroff]

Intel and AMD need a kick in the teeth when it comes to PCI-e lane provisioning :s

 

[Bint Box]

Thank you for the replies guys.
Threadripper with 64 pcie lanes sounds OK if I can pick up a used one at a sensible price.

 

[Tetras]

If you can let us know what you need lanes for, we may be able to find you something cheaper, if there happens to be a board or config that can accommodate your needs.

 

[Bint Box]

If you can let us know what you need lanes for, we may be able to find you something cheaper, if there happens to be a board or config that can accommodate your needs.

I hope to run 3 x 3080Ti/3090 cards in one motherboard using 16 pci lanes (Gen4) per card.
It is for a cuda based custom app project.

My alternative is to buy a second user X99 board and use an i7-5930k in it with two cards in the board. Then just slot the 3rd card in any board.
However, the drawback here is that x99 is not Gen4.

 

[humbug]

Lowest end AMD chip with 64 PCIe 4 lanes that i can see is the TR 3960X, but they are not cheap at about £1400 new, you will also need a TRX40 motherboard, they are not easy to find, but you can get them, also not cheap.

 

[Tetras]

I hope to run 3 x 3080Ti/3090 cards in one motherboard using 16 pci lanes (Gen4) per card.
It is for a cuda based custom app project.

My alternative is to buy a second user X99 board and use an i7-5930k in it with two cards in the board. Then just slot the 3rd card in any board.
However, the drawback here is that x99 is not Gen4.

I don't know much about that kind of heavy usage, but I thought I should ask, are you sure that the full lanes are actually necessary? They're often not, even for heavy computing use and something like the Z790 Creator (5.0 8 & 8 lane + 4.0 4 lane) may be sufficient.

 

[Bint Box]

I don't know much about that kind of heavy usage, but I thought I should ask, are you sure that the full lanes are actually necessary? They're often not, even for heavy computing use and something like the Z790 Creator (5.0 8 & 8 lane + 4.0 4 lane) may be sufficient.

I tested the custom app process in an x99 board with i7-5820k processor which gave me 24 lanes, 16 on one GPU card and 8 on the other GPU card.
After noting the custom app speed of performance I repeated the test on the exact same rig but with an i7-5930k processor which gave me 16 lanes for each card.

The result was that the GPU card that was previously using 8 lanes increased the app performance considerably as soon as it had access to 16 lanes.

 

[Tetras]

The result was that the GPU card that was previously using 8 lanes increased the app performance considerably as soon as it had access to 16 lanes.

I see, that's a pity (and expensive).