7950 Crossfire 32 bit bus width Tags: Radeon Bus Crossfire Graphics Last response: December 28, 2012 11:12 AM in Graphics & Displays Share Die705 December 28, 2012 5:10:38 AM Hey guys I have 2 7950s in crossfire and one is running at the normal bus and bandwidth of 384bit and 240GB/s but the other card is running at 32bit bus width and 20GB/s Bandwitch: http://gpuz.techpowerup.com/12/12/28/3hf.png The normal one http://gpuz.techpowerup.com/12/12/28/de4.png The slow one here are my system specs: i7 3770K Stock (currently) Asrock Extreme 4 Z77 2x 7950 Powercolor PCS+ 8GB of Cosair Vengeance OZC Agility 3 120GB Any Ideas on how to fix up that bus speed? More about : 7950 crossfire bit bus width Die705 December 28, 2012 10:38:59 AM Fixed it by myself, new crossfire bridge, regestry edits, disabled the CCC overdrive Boost, Disabled UPLS, so yer done hytecgowthaman December 28, 2012 11:12:11 AM Gpu set up look like this. 1x gpu=x16; 2x gpu=x16+x16=(x32); 3x gpu=x16+x8+x8=(x32); 4x gpu=x16+x8+x4+x4=(x32). so 2xgpu=4xgpu. If the slow gpu is in x4 port u only get 25% of the speed. insert both cards in x16 slot to get full speed . Can't find your answer ? Ask ! Publish Related resources : ForumCards bus width not the same in Crossfire ??? ForumSapphire Radeon 7950 Crossfire Help ForumHd 5770 bus width Forum384- bit memory bus AMD/ATi ForumVideo Memory width , versus speed. performance comparison ForumPCI-E Bus Interface question ( 7950 ) Forum7870 or 7950 ForumGalaxy GTX 660ti 3gb vs HD 7950 3gb OC edition V2 ForumMsi 660ti vs sapphire 7950 oc ForumHD 7950 vs GTX 660Ti Forum660ti, 7870 or 7950 and why? Forum660Ti or 7950 ? Forumbit width ForumHD 7950 @ PCI-E x1 1.1 instead of x16 2.0, please help ForumBit width multiple of 16 ForumMy game is telling me I need to install Physx, but I have an AMD card? ForumBEST 1080 VIdeo card for ~700 2 GTX 670, GTX 680, dual 7950 or 7970 ForumOverclocking Sapphire 7950 ForumXFX Double D Radeon 7950 vs Galaxy GTX 670 ForumProblems booting with Crossfire HD 6950's More resources Read discussions in other Graphics & Displays categories Ati GPUs Graphics Cards Gtx HD Monitors SLI Crossfire Tuner Cards Radeon Video Diamond Multimedia Matrox Nvidia Palit PowerColor Asus Games !