PCI-e 3.0 isn't the issue here as GTX 780 Ti works flawlessly on this setup :

I would test another Radeon PCI-E 3.0 card before dropping that theory. Or maybe motherboard just can't comprehend 8gb of VRAM.

Doesn't the R9-390X require a UEFI capable system?

I know even some of the R9-280X cards require UEFI.

cyclone3d wrote:

Doesn't the R9-390X require a UEFI capable system?

I know even some of the R9-280X cards require UEFI.

I'm using EFI bootloader (Clover), to force Windows installation in UEFI mode (on GPT HDD).
Also, I thought UEFI only vBIOS woudn't even boot/POST on Legacy BIOS board ?

@The Serpent Rider OK, fair enough.
However, I don't have another Radeon PCIe 3.0 GPU...

PS. Board can handle 8GB of RAM with AM2 CPU : https://valid.x86.fr/5xzn0b
Problem still persist with it installed 😒

Try every BIOS version you can find, including beta/unofficial ones.

I got a spare Radeon R9 290 (same GPU as the R9 390X) and a 939Dual-SATA2 with an AM2 CPU which I can try together under Windows 7 if you want me to. Just have to swap out the crappy 300W PSU in that rig.

@MrMateczko Well, there are only 3 BIOS'es for this board (aside from First release), and unofficial one (1.30A) adds... better Fan control.
I don't think there is a BIOS that can help me 🙁
Unless... someone could mod AMD PCI-e 3.0 support into official one 😉

@Kamerat
If you could, please do. I would like to know if it's something that can be bypassed on other AMD PCI-e 3.0 GPU.
BTW, I tested my other AM2 board :
AliveDual-eSATA2, and it doesn't even show post with this card 😒
However, based on sounds, it does try to boot... there simply is no picture on monitor and it fails in loading Windows (crash and restart on booting, from what I can hear).

On my Rampage Extreme (X48, LGA 775) - card works fine (so, it can't be UEFI only card) : LINK

Most likely this is some kind of incompatibility with the ULI chipset. Unfortunately I don't have this board to test it myself, the oldest chipset I was using with Hawaii card is nForce Pro 3600 http://hwbot.org/submission/3699921_havli_pcm … 380_18022_marks

agent_x007 wrote:

@Kamerat
If you could, please do. I would like to know if it's something that can be bypassed on other AMD PCI-e 3.0 GPU.

It works. Installed a XFX R9 290 (reference design) on a 939Dual-SATA2 today and drivers intalled just fine in Windows 7 64 bit. Not running any EFI bootloader BTW. Also tried a couple of games which also works. The board is stuffed with 6GB DDR2 memory.

Looks like 8gb is just too much.

Kamerat wrote:

It works. Installed a XFX R9 290 (reference design) on a 939Dual-SATA2 today and drivers intalled just fine in Windows 7 64 bit. Not running any EFI bootloader BTW. Also tried a couple of games which also works. The board is stuffed with 6GB DDR2 memory.

The Serpent Rider wrote:

Looks like 8gb is just too much.

Indeed 🙁
@Kamerat Can I ask for a 3DMark Firestrike run screen shot or a valid link (would like to know if it's stable and how far in score it can go on Athlon64 S939 platform) ?
Thank you very much for your help.

Wish someone had a OG GTX Titan or GTX 980 Ti with 6GB VRAM to see if they can work in this board...

Looks like clover isnt delivering configuration information for VGA Card..

It doesn't for Radeon R9 390X, but it does for GTX 780 Ti (same system config) ?
Ok, I will check if legacy booting will change the outcome, but I doubt it...

agent_x007 wrote:

@Kamerat Can I ask for a 3DMark Firestrike run screen shot or a valid link (would like to know if it's stable and how far in score it can go on Athlon64 S939 platform) ?
Thank you very much for your help.

Here you go. 😀

Awesome, Good job !

Half-year update on this (it took a while to get a 4GB+ VRAM card to test this 😁)
We were wrong. The board works with 8GB VRAM cards (Memory Hole option enabled), it simply defaults to 16 color (that's NOT "16-bit" mind you), palette without drivers.

I tested GTX 1080 with mine :

Valid : LINK

agent_x007 wrote:

Half-year update on this (it took a while to get a 4GB+ VRAM card to test this 😁)
We were wrong. The board works with 8GB VRAM cards (Memory Hole option enabled), it simply defaults to 16 color (that's NOT "16-bit" mind you), palette without drivers.

It must be shocking to see Windows 7 in 16 colors (I assume that's what you were running judging by the screenshot above). 😵

Anyways, glad to hear you got your GTX 1080 to work with your 939Dual-VSTA motherboard, that graphics card has twice the memory as your RAM.

agent_x007 wrote:

it simply defaults to 16 color (that's NOT "16-bit" mind you), palette without drivers.

KCompRoom2000 wrote:

It must be shocking to see Windows 7 in 16 colors (I assume that's what you were running judging by the screenshot above). 😵

My screenshot clearly has them installed 😉

agent_x007 wrote:

agent_x007 wrote:

it simply defaults to 16 color (that's NOT "16-bit" mind you), palette without drivers.

KCompRoom2000 wrote:

It must be shocking to see Windows 7 in 16 colors (I assume that's what you were running judging by the screenshot above). 😵

My screenshot clearly has them installed 😉

Yes, I know, I was talking about what it must've been like before having the drivers installed. Sorry for not being clear enough.

Final update : Memory Hole = [Enabled] to the rescue !

CPU-z Valid : https://valid.x86.fr/dhl3hv

EDIT :
So, after a card replace, 390X stopped working... again.
I can say this issue is NOT PCI-e 3.0 based and is limited to 3GB VRAM or more.
Kepler GPUs are working "out of the box", while Pascal and 390X do not 😒
They MAY work if windows was installed on them.