EPYCD8-2T pcie and cpu questions

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   I have two questions regarding the EPYCD8-2T motherboard.

Q1) There are 3 PCIe Gen3 x8 slots on this board. Each slot is open ended so it can fit x16 cards. What I'd like to confirm is the max power an x16 video card will be able to pull when inserted into one of the x8 slots. Since the slot is x8 will it limit power draw to 25W? Or because they allow x16 cards will the slot allow the full 75W?

Q2) This motherboards CPU list says the tray version (OPN PS740PBEVHCAF) of the EPYC 7401P is supported but doesn't mention the box version (OPN PS740PBEAFWOF). As I understand it there's no difference between the 2 electrically (warranty trickery aside)? So I just want to confirm that this motherboard supports either the PS740PBEVHCAF or the PS740PBEAFWOF 7401P's. And I assume this is true (tray and boxed support) for the other supported CPUs for this mobo as well?

Q3) When installing more than 4 GPUs (say 7), is there any special firmware that is needed?

Sorry if these seem obvious but it's a build for someone else and I'm being paranoid.

Thanks

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neoavalon Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 15 Jun 2019 Status: Offline Points: 10	Post Options Post Reply Quote neoavalon Report Post Thanks(0) Quote Reply Topic: EPYCD8-2T pcie and cpu questions Posted: 16 Jun 2019 at 8:03am
	I have two questions regarding the EPYCD8-2T motherboard. Q1) There are 3 PCIe Gen3 x8 slots on this board. Each slot is open ended so it can fit x16 cards. What I'd like to confirm is the max power an x16 video card will be able to pull when inserted into one of the x8 slots. Since the slot is x8 will it limit power draw to 25W? Or because they allow x16 cards will the slot allow the full 75W? Q2) This motherboards CPU list says the tray version (OPN PS740PBEVHCAF) of the EPYC 7401P is supported but doesn't mention the box version (OPN PS740PBEAFWOF). As I understand it there's no difference between the 2 electrically (warranty trickery aside)? So I just want to confirm that this motherboard supports either the PS740PBEVHCAF or the PS740PBEAFWOF 7401P's. And I assume this is true (tray and boxed support) for the other supported CPUs for this mobo as well? Q3) When installing more than 4 GPUs (say 7), is there any special firmware that is needed? Sorry if these seem obvious but it's a build for someone else and I'm being paranoid. Thanks

gordan Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 15 Nov 2019 Location: UK Status: Offline Points: 8	Post Options Post Reply Quote gordan Report Post Thanks(0) Quote Reply Posted: 05 Dec 2019 at 9:02pm
	1) I don't know for sure but I can confirm that a 1080Ti works in the x8 slots. Most GPUs (with the exception of some older, poorly designed AMD ones), o my draw fan power from the slot and everything else comes down the auxiliary power connector. 2) I'm pretty sure all 7xx1 and 7xx2 CPUs will work fine. I have mine running with a 7402P. 3) While there are a few anomalies that come up with external GPUs (see my recent thread on BIOS bugs), a recent GPUs with UEFI firmware should work just fine. Make sure you enable "Above 4GB Decoding" option to make the BIOS map the apertures without the constraints of having to fit them below the 4GB limit.