Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Not sure if my crossfired AMD 6870s are working as they should

06 Oct 2011   #1

Windows 7 Home Premium 64bit OEM
Not sure if my crossfired AMD 6870s are working as they should


I recently purchased a second Sapphire 6870 to add to my original Sapphire 6870. I have set up the cards in my motherboard properly (I think), the original card in a x16 PCI-e slot and the second in what I believe is a x4 PCI-e slot. I have connected the CrossfireX bridge cable thing, and powered them properly with an Antec 750W PSU.

I removed the original drivers and installed the ATI catalyst drivers including the CrossfireX Application Profiles, and windows detected the second card (both are visible in device manager). CCC also detected it and now allows me to check and uncheck "Enable CrossfireX", and to view the CrossfireX diagnostics. However, the diagnostics page is blank and clicking Identify GPU does nothing obvious, other than putting a big "1" on my single monitor.

Playing Crisis 1 used to be around 35 FPS average and I see no performance improvements from adding the second card, however other games do see significant performance improvements.

PSU - Antec 750W
CPU - i5 760 (sometimes overclocked to 3.7Ghz, sometimes not)

My question is how will I tell if crossfire is actually working because the diagnostics page is blank (although I think it should be unless there are errors) and when running games the first GPU heats up whereas the second one does not. Also, the second GPU shows 0% activity.

Also I have been having issues with the display driver crashing and recovering.

Any suggestions?

My System SpecsSystem Spec
08 Oct 2011   #2

Windows10 Pro - 64Bit vs.10547

Not sure if my crossfired AMD 6870s are working as they should-twincards.jpg

are they both showing in device manager..?

don't know which driver you have installed
I was getting blackscreens and GFX recovery messages with the latest 11.10 test driver
I have now reverted to 11.9 - which is stable..

I'd be inclined to use the 11.9 driver from sapphire's own site (check if 32/64 bit version..)

they are pretty good on the assistance side of things
check what the serial numbers of your GFX cards are..
in case they are mis-matched in some way

My System SpecsSystem Spec

 Not sure if my crossfired AMD 6870s are working as they should

Thread Tools

Similar help and support threads
Thread Forum
Laptop speakers working, but headphone jack not working only on Window
Hi, I have a dual boot of Fedora and Windows, and when I boot into Fedora, my headphones work fine. When I boot into Windows 7 64bit, my headphones don't work. My laptop speakers work fine however, and I tried re-installing drivers. I made sure that my headphones are the default playback...
Sound & Audio
Power Req for twoXFX R9-290A Video Cards Crossfired
Looking to buy two XFX R9-290A Video cards and Crossfire them. Each has a minimum system requirement of 750Watts. My PC has a Coolmax CUG-950W power supply and has been driving two XFX HD-5770 cards for over three years. My question is; will the actual PS still be able to drive the two new...
Graphic Cards
Internet not working, windows update, ping, DNS, etc. working fine
Hello, I've got a Dell laptop here that isn't functioning properly. I can't get this to work for the life of me! I am currently using this laptop with a different hard drive, it's the install on the SSD that doesn't work. I know that the quick fix would be to simply reload windows, but I don't...
Network & Sharing
What is the difference between these 2 XFX Radeon 6870s?
Besides the model names and the fact that 1 has a dual fan while the other is single, is there anything else that puts one over the other? AND
Graphic Cards
HDMI Sound randomly not working - test in settings gets it working?
I have started having an issue over the past week (config/drivers/etc not changed in months) where sound will randomly not be output by HDMI. System config/specs... Win7 SP1 all patches, nearly a stock install... only running WMC and XBMC. Only 3rd part stuff installed are SpeedFan an ATI...
Sound & Audio

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 15:48.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App