To those with multi-5970 setups: which mobo are you using?

[dingus]

   I am not sure whether to post this in the mining forum or this..I figured the technical support one would fit more. Anyway...so I find out today that my motherboard, Asus M4A89GTD PRO/USB3, does not work with 2x 5970s. I have tried everything to get them to work; from clearing the cmos, switching the psu cables, switching the gpus between slots, using the most recent mobo bios update..and an older version, multi-gpu link cable and no link cable. I have tried everything.

I have a 1000 watt raidmax psu so I am fairly confident it is not the source of the problem. I believe the bios just doesn't support dual 5970s for some reason, although this mobo worked fine with a single 5970 and a 5770.


Any suggestions?

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[gusti]

  I am not sure whether to post this in the mining forum or this..I figured the technical support one would fit more. Anyway...so I find out today that my motherboard, Asus M4A89GTD PRO/USB3, does not work with 2x 5970s. I have tried everything to get them to work; from clearing the cmos, switching the psu cables, switching the gpus between slots, using the most recent mobo bios update..and an older version, multi-gpu link cable and no link cable. I have tried everything.

I have a 1000 watt raidmax psu so I am fairly confident it is not the source of the problem. I believe the bios just doesn't support dual 5970s for some reason, although this mobo worked fine with a single 5970 and a 5770.


Any suggestions?

I'm not using more than 1 card per machine, but can you tell more ?
OS ?  Are they recognized on the device level ?

[sc8nt4u]

What happens when you have 2 in the system? Does your system see both cards or does it not boot?
 
I'm running 2x5970 on a Asus P6T SE with a XION 1250w PSU.

[dingus]

It boots up I suppose. This is with 2x 5970s. Fans start up, I can tell the hard drive is working, everything seems normal except the "no video signal" from all 4 DVI ports.

Apparently I do not have a powerful enough PSU. I am pretty sure I need a 1200 watt instead of 1000 one. I'll update this thread when I get the chance to try a 1200 watt.

[Raulo]

It boots up I suppose. This is with 2x 5970s. Fans start up, I can tell the hard drive is working, everything seems normal except the "no video signal" from all 4 DVI ports.

Does each work separately in each PCIe slots?

Apparently I do not have a powerful enough PSU. I am pretty sure I need a 1200 watt instead of 1000 one. I'll update this thread when I get the chance to try a 1200 watt.

If it's not a crappy defective PSU, it should be more than enough. I run two 5970s on 850W PSU and there is still some headroom (the system draws 660W from the outlet which is less than 600W on the DC).

[fabianhjr]

The expensive way get one of those Quad-SLI/CrossFire Certified Mobos, an 11 backslots(rare) case and liquid cooling.

The economic way: http://blog.zorinaq.com/

[dingus]

It boots up I suppose. This is with 2x 5970s. Fans start up, I can tell the hard drive is working, everything seems normal except the "no video signal" from all 4 DVI ports.

Does each work separately in each PCIe slots?

Apparently I do not have a powerful enough PSU. I am pretty sure I need a 1200 watt instead of 1000 one. I'll update this thread when I get the chance to try a 1200 watt.

If it's not a crappy defective PSU, it should be more than enough. I run two 5970s on 850W PSU and there is still some headroom (the system draws 660W from the outlet which is less than 600W on the DC).

It is an 80 gold certified PSU. I am not sure what you mean if they work separately in each slots. I have tried one card at a time in each slot, to determine if I have a faulty card, but they both work that way; just not together, link cable or not. I am thinking it is a mobo bios issue.



edit: Alright. Take a look at this "certified crossfire PSU" which is 1000 watt. http://support.amd.com/us/certified/power-supplies/Pages/details.aspx?item=44

It can support 2 5970s.


Now look at this PSU: http://support.amd.com/us/certified/power-supplies/Pages/details.aspx?item=108

Only one supported.


So, I am confused because my PSU is not even on this list http://support.amd.com/us/certified/power-supplies/Pages/listing.aspx

[Raulo]

Now look at this PSU: http://support.amd.com/us/certified/power-supplies/Pages/details.aspx?item=108
Only one supported.
So, I am confused because my PSU is not even on this list http://support.amd.com/us/certified/power-supplies/Pages/listing.aspx

I have a Corsair 850W and it works fine with two 5970s so 1000W should work, too. If each card works alone, it might be a BIOS issue.

[dingus]

Now look at this PSU: http://support.amd.com/us/certified/power-supplies/Pages/details.aspx?item=108
Only one supported.
So, I am confused because my PSU is not even on this list http://support.amd.com/us/certified/power-supplies/Pages/listing.aspx

I have a Corsair 850W and it works fine with two 5970s so 1000W should work, too. If each card works alone, it might be a BIOS issue.

Could it be that I am trying to pull too much power from this single wall socket? I have my 2 monitors, my audio equipment, and my rig on a powerstrip plugged into one socket.

[dingus]

Now look at this PSU: http://support.amd.com/us/certified/power-supplies/Pages/details.aspx?item=108
Only one supported.
So, I am confused because my PSU is not even on this list http://support.amd.com/us/certified/power-supplies/Pages/listing.aspx

I have a Corsair 850W and it works fine with two 5970s so 1000W should work, too. If each card works alone, it might be a BIOS issue.

Could it be that I am trying to pull too much power from this single wall socket? I have my 2 monitors, my audio equipment, and my rig on a powerstrip plugged into one socket.

Nope, it isn't that.

I have given up. I bought a 1200 watt PSU and a MSI 890FXA-GD70 motherboard. I'll update the thread if it works.

[Cryptoman]

Did you try plugging into the onboard DVI connector? 

[dingus]

Did you try plugging into the onboard DVI connector? 

No, but I don't think that would help. When my mobo posts, it makes a beep noise. If I put in both 5970s, there is no beep or video signal. So, I assume, that for some reason the two 5970s are causing some kind of crash to happen within the bios, or I just do not have a supported PSU.

[ShadowOfHarbringer]

Did you try plugging into the onboard DVI connector? 

No, but I don't think that would help. When my mobo posts, it makes a beep noise. If I put in both 5970s, there is no beep or video signal. So, I assume, that for some reason the two 5970s are causing some kind of crash to happen within the bios, or I just do not have a supported PSU.

It is quite common that some motherboards are buggy and don't support certain PCI / PCIE setups.

For example, my motherboard does not support my soundcard, when it is inserted in the first PCI slot.

From what you have said I am 95% certain, that the mobo is at fault.

[dingus]

Did you try plugging into the onboard DVI connector? 

No, but I don't think that would help. When my mobo posts, it makes a beep noise. If I put in both 5970s, there is no beep or video signal. So, I assume, that for some reason the two 5970s are causing some kind of crash to happen within the bios, or I just do not have a supported PSU.

It is quite common that some motherboards are buggy and don't support certain PCI / PCIE setups.

For example, my motherboard does not support my soundcard, when it is inserted in the first PCI slot.

From what you have said I am 95% certain, that the mobo is at fault.

The new motherboard I ordered came in today (used by http://blog.zorinaq.com/ so I know it can work) along with my 1200 watt crossfire certified psu which can supposedly support 2 5970s according to this: http://support.amd.com/us/certified/power-supplies/Pages/details.aspx?item=519

[Cryptoman]

Are you going to try the old mobo with the new PSU?  I'm curious to find out what the problem actually was.

[dingus]

Are you going to try the old mobo with the new PSU?  I'm curious to find out what the problem actually was.

Yes, I will try that out. The computer's going under the knife now, I'll let you know how it goes.

[ShadowOfHarbringer]

I guess that if Bitcoin becomes more popular, then AMD GPU selling will skyrocket.

[dingus]

I guess that if Bitcoin becomes more popular, then AMD GPU selling will skyrocket.

So, I tried the new PSU on the old mobo, same thing happens as before...no video signal. Tried the new mobo with new PSU and I now have 3x 5970s running, but poclbm is only seeing one card, I think. I reinstalled the video card drivers and now am reinstalling Steam SDK 2.3.

CCC says every card except the one is disabled.

[ShadowOfHarbringer]

I guess that if Bitcoin becomes more popular, then AMD GPU selling will skyrocket.

So, I tried the new PSU on the old mobo, same thing happens as before...no video signal. Tried the new mobo with new PSU and I now have 3x 5970s running, but poclbm is only seeing one card, I think. I reinstalled the video card drivers and now am reinstalling Steam SDK 2.3.

CCC says every card except the one is disabled.

Definately a weird shit. Probably one of the weirdest i have seen yet.

[dingus]

I guess that if Bitcoin becomes more popular, then AMD GPU selling will skyrocket.

So, I tried the new PSU on the old mobo, same thing happens as before...no video signal. Tried the new mobo with new PSU and I now have 3x 5970s running, but poclbm is only seeing one card, I think. I reinstalled the video card drivers and now am reinstalling Steam SDK 2.3.

CCC says every card except the one is disabled.

Definately a weird shit. Probably one of the weirdest i have seen yet.

Yeah, its probably some weird bug in their bios which will most likely be fixed in a couple months now that I've started a thread on their forums about it and what not.