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Crossfire 7950 keeps crashing PC

HungryHippos

HungryHippos

HungryHippos

Soldato
Joined
25 Mar 2004
Posts
16,030
Location
Fareham
Hello,

I recently upgraded, and everything seems fine except for with the Crossfire HIS 7950's.

When running any game/3D graphics application the machine will very quickly crash (read: within seconds), sometimes requiring ending whatever application I am running, sometimes hard locking the PC and requiring a power off.

To demonstrate the problem I fired up logging on Afterburner, which showed that the temp on GPU2 was rocketing up as soon as anything intensive was loaded.

I've highlighted the problem area, that column is GPU2 temp and as you can see it goes from 29 degrees to 61 in about 3-4 seconds. This was even with the fans on both cards set to 100%!

6ugLKLA.png


This is my spec:

YpT3ytN.png


I also have a Corsair HX1000 PSU which I got about 4 years ago with my last system build, I don't think it's sold anymore but it looks like this one:

http://www.corsair.com/professional-series-hx1000-80-plus-certified-modular-power-supply.html

The cards when plugged in individually seem to work fine. I've swapped them over and both can run games without crashing out if the other one isn't running, so I don't think it's the cards.

A lot of posts about crashes like this seem to always suggest PSU or overheating problems. I have the side of the case off and the fans running at 100% so I'd be surprised if it's overheating literally, I wonder if there is some bug that could cause it to misrepresent the temps?

1000W Corsair PSU *should* be capable of running both of these cards and my system with power to spare, I don't have a spare PSU to swap it over with though.
 
Could be a faulty card, but before we write it off you can try a few things to see if any of these resolve the issue.

What drivers are you using? The latest are 13.11 Beta drivers, use those. Follow points 1-12 in this guide. Remove, wipe and install the new drivers. Disable ULPS.

Has that fixed the problem?

You should also take a look at the HIS 7950 Ice-Q owners club thread. Its essential reading to get the most from your card and to fix some issues it can present when overclocking.
 
also if your temp is ramping up that quick wich is not normal. at least not from 30s to 60s in 3-5 seconds could be your thermal paste on the card or one of the screws on the card needs tightening.
 
Thanks for the recommendations. I did the steps 1-12 as mentioned, the only thing I couldn't do was run the Driver Fusion App as it refused to load on my system (Win 8). This is a new install of Windows 8 though and the only drivers I had on from before were the 13.9 official ones.

However I still have the same problem, and I did have ULPS disabled via Afterburner previously.

After doing those steps I still found the system locked up pretty quickly after loading Tomb Raider for example, which I seem to be able to play just fine if I use one card or the other!

I don't think any particular card is bad as I have swapped them over and sat there watching them bench away no problem individually.

As soon as I try to use XFire I get the computer says no treatment lol!

Logs from last run on Tomb Raider when it crashed, temps went high again. Unsure if GPU1 or GPU2 is the top card (primary) or secondary though.

yaXdoF8.png
 
If you try the cards individually, what results do you get? Might have a duff card in the mix and this will help prove whther that's the case. Also, you do have the xfire bridge connected?
 
Hi,

The cards themselves seem fine individually, I swapped them about and seem to be able to bench/game on either card when it's plugged into the primary PCIE slot.

XFIRE bridge is of course connected when trying it, and I can see in the AMD Drivers that XFIRE is enabled as expected so the O/S sees that it's connected as well.

I'm most suspect of the PSU at this point in time, it's a few years old now so maybe it's on the way out or degraded somewhat from when I purchased it originally, only problem is I don't have a spare PSU to try :P

Would welcome any other suggestions of things to try though.
 
HAve you checked what your PCIE speeds are looking like when CF is enabled? Bios and/or GPU-Z should show. Just wonderring if it's dropping to x1 or something strange like that when bother cards are in.
 
Eulogy said:
Thanks for the recommendations. I did the steps 1-12 as mentioned, the only thing I couldn't do was run the Driver Fusion App as it refused to load on my system (Win 8). This is a new install of Windows 8 though and the only drivers I had on from before were the 13.9 official ones.

However I still have the same problem, and I did have ULPS disabled via Afterburner previously.

After doing those steps I still found the system locked up pretty quickly after loading Tomb Raider for example, which I seem to be able to play just fine if I use one card or the other!

I don't think any particular card is bad as I have swapped them over and sat there watching them bench away no problem individually.

As soon as I try to use XFire I get the computer says no treatment lol!

Logs from last run on Tomb Raider when it crashed, temps went high again. Unsure if GPU1 or GPU2 is the top card (primary) or secondary though.
Click to expand...

Try the steps i listed again, this time use driver sweeper. Right click driver fusion premium exe and set to Windows 7 compatibility mode. This will make it work with Windows 8.

Second follow my guide here to make sure crossfire is working correctly. Use the advanced method. Setup gpu overlays using afterburner. Play a game and note gpu usage and core clock usage and report back.
 
Cheers guys at work at the moment will give it a go later on :)

Other posts I've read where people had similar crashes after several seconds seemed to be fixed by getting a new PSU however, so I'm sort of hoping I don't need to do that.
 
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