To those with multi-5970 setups: which mobo are you using? - page 2.

dingus

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Quote from: ronaldmaustin on February 13, 2011, 07:51:51 AM

I had something similar with an older ASUS A8N32-SLI where it would not recognize 2 5970's. Then I realized that CCC was only showing one enabled that I had plugged the monitor into. Thus, I would plug the monitor into one 5970 and start the program for device=0 and device=1 and that 5970 would work. Then I'd unplug the monitor from the first 5970 and plug it into the second one and which point I'd rerun the program for device=0 and device=1 again. That's the only way I could get it working in four DOS windows on Win7 x64. My newer MSI Big Bang mobo runs all four in SLI mode with the SLI cable connected on Win7 x64.

You may try plugging your 3rd card in, get the first two working then plug the monitor into the third (check in CCC to see if it went active) then try running the program on the third board. Could work.

Yeah, I figured something like this would work, as it did when I had just one 5970 and a 5770 together. But, I tried it out to no avail. With 4 5970s, which PSU are you using? I assume the 1200 corsair I have only supports 2 because not only does it say on that ATI website I previously posted that it only supports 2, but I have tried using it with 4 and 3 5970s and it didn't work.

ronaldmaustin

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And just FYI for people coming to this thread, bear in mind that PSU rating vary wildly. Certain 1000Watt PSUs will NOT power 2 5970's, while other 750's certainly will. I have personal recent experience with this. If you want the short advice, read whether the PSU is peak rated or constant rated and even then it's a crap shoot. Better yet, just stick with Corsair. WalMart has a 1000 Watt Corsair for $219.82 delivered to your local WalMart. http://www.walmart.com/ip/Corsair-HX-Series-80-Plus-1000-Watt-Certified-Power-Supply-CMPSU-1000HX/12457257 Can't beat it on price or performance for this particular task.

ronaldmaustin

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I had something similar with an older ASUS A8N32-SLI where it would not recognize 2 5970's. Then I realized that CCC was only showing one enabled that I had plugged the monitor into. Thus, I would plug the monitor into one 5970 and start the program for device=0 and device=1 and that 5970 would work. Then I'd unplug the monitor from the first 5970 and plug it into the second one and which point I'd rerun the program for device=0 and device=1 again. That's the only way I could get it working in four DOS windows on Win7 x64. My newer MSI Big Bang mobo runs all four in SLI mode with the SLI cable connected on Win7 x64.

You may try plugging your 3rd card in, get the first two working then plug the monitor into the third (check in CCC to see if it went active) then try running the program on the third board. Could work.

dingus

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Quote from: ShadowOfHarbringer on February 12, 2011, 05:51:10 PM

Quote from: dingus on February 12, 2011, 04:11:57 PM

Ok so I am assuming since this PSU is "certified" for only 2 5970s, that is why having 3 wouldn't work. I took one out and the 2 show up in poclbm now.

Perhaps you should try powering one machine using 2 PSUs.
However you need to connect the "ground" wire from each of the PSUs together first, as otherwise it won't work.

There are easy schematics on the web about how to do that.

EDIT:
Oh, it seems there is even some vid on youtube explaining how to do that...
http://www.youtube.com/watch?v=BviJjNYsIag

Yes, I have thought of that before. Going from this blog post: http://blog.zorinaq.com/?e=42

You can either do all of that fun stuff, or just buy one of these:

http://www.frozencpu.com/products/5637/cpa-167/Lian_Li_Dual_Power_Supply_Adapter_Cable.html

for $14 USD

I will take a look at what you are talking about though. It can't be too difficult.

ShadowOfHarbringer

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Quote from: dingus on February 12, 2011, 04:11:57 PM

Ok so I am assuming since this PSU is "certified" for only 2 5970s, that is why having 3 wouldn't work. I took one out and the 2 show up in poclbm now.

Perhaps you should try powering one machine using 2 PSUs.
However you need to connect the "ground" wire from each of the PSUs together first, as otherwise it won't work.

There are easy schematics on the web about how to do that.

EDIT:
Oh, it seems there is even some vid on youtube explaining how to do that...
http://www.youtube.com/watch?v=BviJjNYsIag

dingus

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Ok so I am assuming since this PSU is "certified" for only 2 5970s, that is why having 3 wouldn't work. I took one out and the 2 show up in poclbm now.

dingus

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Quote from: Cryptoman on February 12, 2011, 03:17:34 PM

I presume you are running Linux based on your avatar. Did you set the DISPLAY=:0 environment variable?

You presume incorrectly

Win 7 64bit until I take the time to decrypt this 1.5TB drive, which is 36-48 hours or something crazy. Then I shall dual-boot or get rid of Win 7 completely.

edit: Just checked the most recent drivers: they are 11-1 while I still have the 10-12 preview drivers. Going to try them out.

Cryptoman

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I presume you are running Linux based on your avatar. Did you set the DISPLAY=:0 environment variable?

dingus

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Quote from: ShadowOfHarbringer on February 12, 2011, 03:02:28 PM

Quote from: dingus on February 12, 2011, 02:47:31 PM

Quote from: ShadowOfHarbringer on February 12, 2011, 01:45:11 PM

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.

ShadowOfHarbringer

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Quote from: dingus on February 12, 2011, 02:47:31 PM

Quote from: ShadowOfHarbringer on February 12, 2011, 01:45:11 PM

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

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Quote from: ShadowOfHarbringer on February 12, 2011, 01:45:11 PM

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

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

dingus

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Quote from: Cryptoman on February 12, 2011, 12:53:08 PM

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.

Cryptoman

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

dingus

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Quote from: ShadowOfHarbringer on February 12, 2011, 07:52:02 AM

Quote from: dingus on February 12, 2011, 12:28:54 AM

Quote from: Cryptoman on February 12, 2011, 12:20:30 AM

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

ShadowOfHarbringer

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Quote from: dingus on February 12, 2011, 12:28:54 AM

Quote from: Cryptoman on February 12, 2011, 12:20:30 AM

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

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Quote from: Cryptoman on February 12, 2011, 12:20:30 AM

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.

Cryptoman

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Did you try plugging into the onboard DVI connector?

dingus

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Quote from: dingus on February 11, 2011, 12:59:50 PM

Quote from: Raulo on February 11, 2011, 12:47:57 PM

Quote from: dingus on February 11, 2011, 11:23:05 AM

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.

dingus

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Quote from: Raulo on February 11, 2011, 12:47:57 PM

Quote from: dingus on February 11, 2011, 11:23:05 AM

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.

Topic: To those with multi-5970 setups: which mobo are you using? - page 2. (Read 8292 times)