Hello all
I have a problem thats making me suicidal for over a week now i have spent upto 12 hours a day trying everthing i and others from the asus and Ati forums have advised i try to get the 2 gpus to crossfire on the asus pq5-e mobo.I purchased one 4890 and was very pleased with the performance i deceided to get another as this Mobo Is SUPPOSED to be Crossfire capable.By just adding the card was a total fail in both Vista64 on drive 1 and on Drive2 XPHome,the crossfire was not recognised.In each case 2 gpus did show in device manager also in the vista the CCC showed one GPU as primary and a second linked.Yet in the info box Nothing was shown as the crossfire setup even though it was enabled.Then in XP32 after doing a clean install of OS showed one primary and one DISABLED and in the info box it DID show the crossfire as enabled and the setup was shown. Also here unlike vista i was able adjust in ATI Catalyst Control Center the Fans and OC individually.Ok so far ?? just to confirm One card in top PCI-E and runs fine /One card in second PCI-E and same no probs BUT add both cards and the bridges linking them and i only get Video output from PCI-E 1 nothing from the lower card ( To ADD Confusion if i conn lower GPU at swicth on In Boot the display shows bios info then windows screen startup only to go into standby after that with NOSIGNAL on screen The Monitor is a Asus 243W 24in 1900 x 1200 HD/DIV/VGA ).Then when plugging the vid out into the top GPU the monitor returns and all look good as i said info shown s in Xp( 1x primary 1x disabled) same as for vista (1x primary 1x linked).This same information i passed on to XFX and the Supliers both say that as no issue shows with individual GPUs they are ot intrested asus advised i update to the latest bios and chipset drivers and retry( this i did) one thread that did run thru both asus and XFX was that if the Crossfire was showing as enabled in CCC then it was running BUT with XP showing the lower GPU as disabled and all the tests have run with 3DMark 06 and running Fraps in Arma and Fear also any other games I Do Not get either a higher score in FuterMark 06 and no improvement in FPS in any of the games ( in Arma i noticed Lower performance with 2 GPUs).I was going to get another mobo to rebuild system so remove this one as the problem But its almost new and cost nearly