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Author Topic: 5970 and 6950 crashing, slow speeds. Can't mix series?  (Read 1586 times)
Yanz
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May 30, 2011, 12:38:39 AM
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So I got a 5970 to put in my mining rig which already has a 6950 in it. However I can't get all three GPU's to all mine. Either one slows down, crashes, or BSOD.

When the 6950 is primary, none of the 5970 cores show up as CL devices.
When the 5970 is primary, it BSODs right after the desktop loads.

I've tried driver sweeper and reinstalled everything, now it BSODs when I have both cards in.
One interesting note, when I have the 6950 as primary, under Catalyst, it says the second core of the 5970 is disabled.

Anybody else having these issues or know how to fix it?
I would really appreciate it.
2 monitors, one on each card
6950 unlocked
5970
800 watt Mushkin psu
Catalyst 11.5, SDK 2.4, MSI Afterburner
Win7 x64

Other stuff
Q9300, Abit IP 35 Pro, 4GB ram

Another side question, can Afterburner support multiple GPUs of different series at the same time?

With great video cards comes great power consumption.
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RyNinDaCleM
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May 30, 2011, 01:12:50 AM
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I didn't know Mushkin made PSUs!
Is your CPU OCed?
Do you have PCI-e in the BIOS set to 100MHz?
GPU Temps?
MSI AB should OC multiple series GPUs. Just make sure the synchronize GPUs box is NOT checked, and you set them individually. Change to the GPU you want to adjust through the settings.
On that chipset, you prolly have what... a 4x slot for your second card? And, your first slot probably drops down to 8x. Doing this kind of work, you are probably saturating these slots.


Additional note:
Install each individual driver for each card.

TheShoura
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May 30, 2011, 01:30:05 AM
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I found that my 5970 would not run with any of my 6870's installed. However, a 5970+5870+5870 work just fine

Just my two cents, but seems mixing isn't good.

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Yanz
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May 30, 2011, 01:37:11 AM
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I didn't know Mushkin made PSUs!
Is your CPU OCed?
Do you have PCI-e in the BIOS set to 100MHz?
GPU Temps?
MSI AB should OC multiple series GPUs. Just make sure the synchronize GPUs box is NOT checked, and you set them individually. Change to the GPU you want to adjust through the settings.
On that chipset, you prolly have what... a 4x slot for your second card? And, your first slot probably drops down to 8x. Doing this kind of work, you are probably saturating these slots.


Additional note:
Install each individual driver for each card.
Thanks for the synchronize tip.
CPU is not OCed, temps are 72, PCIe is at 100Mhz.

Actually mining is not memory intensive. That's why people here can use 1x extenders without a problem.

I found that my 5970 would not run with any of my 6870's installed. However, a 5970+5870+5870 work just fine

Just my two cents, but seems mixing isn't good.
That's what I was afraid of...
I'm downloading LinuxCoin right now. See if it runs in there.

With great video cards comes great power consumption.
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