need help with crossfire!

[ShadowVVL]

I cant figure out how to enable CF with 2 5870s

Drivers are 11.10.

 

[cmdrdredd]

Normally it's enabled by default.

 

[ShadowVVL]

Its only showing the load on 1

 

[cmdrdredd]

Its only showing the load on 1

What game and did you install the CAP(Catalyst Application Profiles)?

Some games have crossfire disabled in the CAP because of driver problems.

 

[ShadowVVL]

I ran left 4 dead and gta san andreas with and with out cap and I cant figure out if CF is enabled or not since I cant find it in catalyst

 

[cmdrdredd]

You'll just have to look at the GPU load. Download MSI Afterburner and enable the OSD. You can monitor GPU usage, clock speeds, temps, fan speeds, FPS and all during a game.

You should see the load go across both GPUs. If you play Battlefield 3 you will see 100% or very near it on both GPUs if it's working right.

 

[ShadowVVL]

I dont have bf3 but I will install startcrasft and run after burn tomarrow.

thankyou.

 

[Termie]

Ok, just went through this with my HD5850s. If you don't see a "CrossfireX" link within the Catalyst Control Center's "Performance" tab, then the installation isn't registering with the drivers.

- First thing I'd do is test both cards separately in the top slot to make sure they both work correctly.
- Assuming they do, the next thing to do is to uninstall all ATI drivers (and preferably use a driver cleaner just to make sure), shut down, and then install the second card with the crossfire connector attached. (I'd read that you should load up without that, but that didn't do anything good for me)
- When it loads into windows, you'll need to install the ATI drivers, preferably the latest (11.10). Some people say you then need to restart and install a second time (for the second card), but I don't think that actually does anything.
- Once Catalyst Control Center is installed, you should go into the control panel and see if the "CrossfireX" appears right next to the "Overdrive" link in the "Performance" tab.
- If CrossfireX shows up, it will probably default to enabled unless something else is wrong.
- If CrossfireX does not show up after all these steps, then either you have a crossfire connector problem or a motherboard slot problem (at least that's all I can think of). I'd then test each card alone in the bottom slot.

Let me know if this works. No reason to do any game tests if CrossfireX doesn't appear in the control panel...and while the CAP is necessary to get specific game optimizations, it isn't critical to get CrossfireX to appear in the Catalyst Control Center.

By the way, you should post your system specs when you ask for help on advanced setups. We need to know your motherboard and your powersupply, and it would help to know your CPU too. And just as a personal example, I could not get crossfireX to become enabled, despite seeing the option in Catalyst, until I pulled some memory out. Crossfire would not function with a mixed set of ram (2x4GB, 2x2GB). So you ought to post your memory setup too...

 

[IGhzI]

Do you have the cf connector, that's the real question?

Sent from my HD7 using Board Express

 

[ShadowVVL]

thanks termie, I will try that.Sorry for not posting system specs its a amd phenom x6 1090T no OC, msi 890fx,ram 8gb corsair Dominator,2x sapphire 5870s ,1000w corsair psu.

the cards are bridged using the cf bridges sapphire support said to use both.

 

[ShadowVVL]

I haven't fixed the issue Im thinking the the catalyst isn't working with the drivers or one of the links is bad.Its one of my brothers friends systems and was working on it for a few days but its out of my hands now.

 

[Termie]

I haven't fixed the issue Im thinking the the catalyst isn't working with the drivers or one of the links is bad.Its one of my brothers friends systems and was working on it for a few days but its out of my hands now.

All right. Well, if it's software then you can always clean drivers and reinstall. Guess it's up to the owner to figure out now.

 

[hgen]

I believe both cards have to be set identically ie set gpu and mem clock the same speed for both cards with amd overdrive in catalyst controller. Then reboot and see if that makes a difference.

 

[apoppin]

I believe both cards have to be set identically ie set gpu and mem clock the same speed for both cards with amd overdrive in catalyst controller. Then reboot and see if that makes a difference.

Nope. Clocks may be set independently of each other.

Look in the CCC (Vision CP) at CrossFire Diagnostics. As long as there is no message and it shows a "linked adapter", you are fine

Download a benching tool like 3DMark06 or Vantage if it is free now.

 

[hdfxst]

I believe both cards have to be set identically ie set gpu and mem clock the same speed for both cards with amd overdrive in catalyst controller. Then reboot and see if that makes a difference.

i have 2 mismatched cards at different clock speeds and xfire works fine

 

[NTAC]

Just run GPUZ, it will tell you if you have xfire enabled or not.