Hardware question - 775 mobo for multi gpu set-up?

[sterone]

I have an Asus P5K-E/WIFI-AP with Q6600 lying around, was thinking of using it with 4 RX cards for mining. will there be any issues if I use that mobo? I dont think it is PCIE 2.0 yet.

[1714909705]

1714909705

[1714909705]

1714909705

[1714909705]

1714909705

[1714909705]

1714909705

[MA3A]

I have built two pc's based on 1:XFX NFORCE780i SLI with core 2 duo e8400 and 2: EVGA Nforce i780 SLI with quad 6600 c2d cpu, both ran 3 sli nvidia 1070 cards without any problem. However, none of those boards wanted to take 2 cards... either 1 or 3. I did not try to spend much time figuring out why, just got three running, below is the link with pics: https://www.facebook.com/permalink.php?story_fbid=1072587589508989&id=348409301926825

[kopija]

For single GPU usage no problem. I even used Pentium 4 based s775 motherboards.
But you may have to bridge pins on PCIEx1 slots when using risers.
Instructions here
https://www.gobitgo.com/articles/1001/How-To-Correctly-Use-and-Install-PCI-E-Riser-Cables/
Also, that quad core should be undervolted or you can simply swap it for a Celeron for a couple of dollars.

[sterone]

thanks for the replies guys. I've also been reading on dummy plugs. is it an issue with 775 mobos to have dummy plugs on gpus which aren't connected to a monitor?

[kopija]

thanks for the replies guys. I've also been reading on dummy plugs. is it an issue with 775 mobos to have dummy plugs on gpus which aren't connected to a monitor?

no problem on linux with nvidia
on windows you need one gpu connected to monitor

[JaredKaragen]

thanks for the replies guys. I've also been reading on dummy plugs. is it an issue with 775 mobos to have dummy plugs on gpus which aren't connected to a monitor?

no problem on linux with nvidia
on windows you need one gpu connected to monitor

If you are using the PCIE 1-16x slot for GPU;  disable the onboard.   Trust me.  Nothing but heartache.

The socket 775 Mobo's are fine.  I have even used the first gen AMD X64 motherboard/CPU from an old dismantled name brand home pc.

As for the issue with a monitor needing connected;  that's dependent on the driver or GPU itself.
I have never heard of the OS itself causing this to be an issue.

I have personally never once had a nvidia > 6 series card ever need a monitor or dummy plug plugged in for the miner to boot and operate correctly.  I only have an issue if its my home gaming PC with multiple GPU's, and I left a monitor unplugged when I booted;  it didn't want to pick up my monitor as primary unless it was on the GPU populating the PCIE 16x slot #1 for some reason... but my monitor is always plugged in, so no issue there.

I have only heard of this issue with AMD, and specifically RX series, though it may encompass more than just those.

[sterone]

thank you very much for the input. these are noted. my current set-up is with my gaming rig equipped with two rx 470s which is obviously connected to a monitor. no problems with these two. im looking to creating a mining only rig with the old components I posted earlier and will be ordering some RX series graphics cards for it. thanks again!