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Crossfire not working?

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  • Crossfire
  • Graphics
Last response: in Graphics & Displays
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October 18, 2013 8:45:00 PM

Yesterday, I went out and bought two MSI Twin Frozr R9 280x cards and installed them last night. One card worked, and one didn't. So today, i exchanged the DOA card for a new one, and after a few reboots and such, got everything installed.

When I run Unigine Heaven with Afterburner open, it shows GPU1 usage at 98% but GPU2 usage stays at 0%. According to GPU-Z and CCC, Crossfire is enabled. Both programs list both of the 280s, and they both appear in Device Manager... but for some reason the 2nd card isn't doing anything? It doesn't even warm up during benching like the first card. Also, the Crossfire bridge is installed

Last thing - both cards are at stock speeds, I haven't tried overclocking anything on them. I tried to download the 13.11 Beta driver, but whenever I go to install it, it gives an error message saying

"AMD Catalyst Mobility cannot be downloaded due to incompatible hardware/software on your computer. Your computer does not contain a proper graphics adapter"

My specs:

2 MSI Twin Frozr R9 280x (Crossfire)
Board - Asus P6X58-E WS
CPU - Intel I7 970 hex core (overclocked to 4.2ghz)
PSU - Rosewill 1000 watt
Ram - 24gb DDR3

Does anybody have any ideas?

More about : crossfire working

October 18, 2013 8:48:32 PM

Have you verified that both R9s work properly independently (one at a time installed)?
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October 18, 2013 8:49:50 PM

Yes i did. Installed one, hooked up monitor and booted. Then removed, and did the same with card 2. They both worked fine
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October 18, 2013 8:52:23 PM

What version of Windows are you using?

Also, you should not be using the Mobility version of Catalyst (per the error above). Rather, you should be using the regular (desktop) version.
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October 18, 2013 8:55:02 PM

Win 7 64 bit. I do have the regular CCC installed, its just that when I went to AMDs driver download site, i entered all the info as far as what OS, GPU and such i had, and that's what it recommended that I download.
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October 18, 2013 8:55:29 PM

Try the one I linked.
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October 18, 2013 8:57:56 PM

Just finished downloading. I'll report back in a few.... thanks for the help!
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October 18, 2013 8:58:25 PM

Got my fingers crossed for you.
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October 18, 2013 8:59:03 PM

Before I install, should I uninstall all the old Catalyst programs and drivers first?
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October 18, 2013 9:00:53 PM

It wouldn't hurt to do so, just to be on the safe side. But, in reality, it shouldn't matter. However, these are beta drivers so go ahead and remove the previous ones.
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October 18, 2013 9:03:46 PM

Ok installing now. Just a thought - my motherboard doesn't support PCIe 3.0, only 2.0 but i did pretty deep research before buying these cards, and i read that 2.0 would be fine. Could this be an issue?
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October 18, 2013 9:11:20 PM

That should not be an issue at all. PCIe 3.0 devices work fine in PCIe 2.x slots, they are backward compatible.
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October 18, 2013 9:31:00 PM

doesn't seem to have made a difference. GPU 2 shows a usage spike of 100%, but during Unigine Heaven it stays at 0 while GPU1 hits around 60%. Although, on this last bench, the heatpipe for GPU2 got pretty hot, whereas it never even did that before
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October 18, 2013 9:33:35 PM

Also, what profile on Unigine are you using?
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October 18, 2013 9:38:55 PM

There is a difference between bus interface? I don't know if that means anything or not

I'm using the Extreme Preset. Getting a score of around 1070
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Best solution

October 18, 2013 9:39:22 PM

Both are definitely enabled. Do you also have Unigine Valley? If not, get it. Use the Extreme HD Preset and run it.

http://unigine.com/products/valley/download/
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October 18, 2013 9:40:18 PM

Downloading now... i'll report back again haha
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October 18, 2013 9:41:25 PM

Dleslie212 said:
There is a difference between bus interface? I don't know if that means anything or not

That is common. In multi-GPU systems, on some motherboards, the second GPU slot runs at x8 speeds, while the primary runs at x16. This is the case with your motherboard chipset.

Some run at x8/x8 and some newer mobos run at full x16/x16.

Really not a concern for you.
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October 18, 2013 9:52:59 PM

Ok that seemed like it worked! On extremeHD, the score was just over 3000. I wasn't able to grab a screen of that, but heres a screen of the Afterburner info while the bench ran

http://i43.tinypic.com/2egd8r5.png

how does that look?
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October 18, 2013 9:53:58 PM

You are good to go! Have fun!!
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October 18, 2013 9:55:02 PM

awesome. thanks so much for all the help, i really do appreciate it! btw, is 3000 a pretty decent score? And do you think Unigine Heaven is just bugged or something?
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October 18, 2013 9:59:27 PM

Language please! We ban people for such things, BTW....No "f bombs".

Run the full benchmark in Valley and then post your scores here:

http://www.tomshardware.com/forum/393368-33-unigine-val...

You can also get an idea of how your rig compares to others.

Not all benchmarks/games/applications can take full advantage of multi-GPU configs.
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October 18, 2013 10:00:35 PM

my bad. thanks again for the help.
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October 18, 2013 10:01:33 PM

You are most welcome. Later!

BTW, you did good getting your rig up and running. Well done!
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!