Legit Reviews

have two ati sapphire x 1950 pros can not get crossfire to work at all all i get is wavey lines in game and the same when i start 3Dmark05 i have all the latest drivers (7.7) they are found everywhere else on the pc (device manager etc) but they are found in catalyst control center some people have suggested not enough power i dont think this is the case am running Enermax Liberty 500w modular psu, asus a8r-mvp mobo and have 2 gig of dual channel ram. Any ideas will be gladly heard as am at wit end many thanks Ali3nzGuy

Do you have xp or vista?

Dan

xp home

Is anything overclocked?

What happens when you run ATItool's artefact scanner.

Dan

nothing is over clocked all is as should be i have also done a fresh install from start with both cards in

i have got it working now at last i will post what was done in case anyone has the same problem:
downloaded latest ccc 7.7 and installed
rebooted machine
once installed went to control panel/add and remove there is ati uninstall utillity click it and it removes all drivers from machine (old,new the lot)
reboot
download and install latest ccc again (7.7) with one card in
shut down machine installed second card
restart machine once loaded go to catalyst control center
enable crossfire
my machine crashed at this point and i got a BSOD
restarted machine and everything worked
oh and make sure catalyst A.I is disabled you'll find under 3D

ran 3Dmark05 one card got 8227
" " " " two cards got 8812

so think it is safe to say it is working hoooooorrrraaaaaayyyy

Well at leasat it's working now (I'm glad that you managed to fix it as I wasn't sure what to suggest next really )

Your performance improvements don't seem to be that much with the 3dmark scores, did you see a big improvement in regular games?
(Its almost like its enabled, but not working at full capacity)
I agree that a 500W PSU should be plenty for this setup though, so maybe you are just CPU bound at the minute (get back to overclocking it ).

Dan

and how would i go about doing that i have an auto overclock on mobo but it doesn't let me go any higher than 2.65 and ideas what my processer
will run at with being unstable

Try running through this guideto get an idea of how to overclock.

Post back with anything you still have questions about.

Dan

cheers will do

I had the same your problem!
Thank you, following your advices I managed to fix the problem, even if not definally
Now my cross fire is working (with 2*x1950pro 256mb). Every game (except 4 stalker, and I don't understand why) run well.
BUT: if I take a look on 3dmark06, on the "system detail" it tells me that my video memory is 320mb!!

Why???

What happened??

Shuldn't be 512?

Thak you 4 help

Spieluhr

well i'm not satisfied are working properly the are working but just not right check that the bios is the same on both cards that is the first place to start!!!!

Spieluhr86 wrote:BUT: if I take a look on 3dmark06, on the "system detail" it tells me that my video memory is 320mb!!

I don't know why it is registering as 320MB, but the way crossfire (and sli) work is that both cards have to process the same data so it is not actually a total of 512MB Vram, as they both have to hold the same data to process the frames consecutively, so its just like they are a much faster 256MB single card solution.

Maybe STALKER uses really high resolution/quality textures and is using up all of your Vram? Or it could just have a crossfire bug.

Dan