Asus MOBO Xfire Bandwidth Tags: Asus Bandwidth PCI Express Motherboards Last response: February 1, 2010 12:54 PM in Motherboards Share staalkoppie February 1, 2010 9:10:33 AM I have a Asus M4A785TD-V Evo AM3 Mainboard with two PCi-e lanes. If I understand correctly, if I were to add a second Ati HD4890 in Xfire, the x16 lane would then divide in 2x8 lanes? And assuming the previous assumption is correct, will the 2x8 lanes provide enough bandwidth for proper scaling from 1 to 2 GPU's, or will the lower bandwidth throttle performance? More about : asus mobo xfire bandwidth outlw6669 a b Ĉ ASUS a b V Motherboard February 1, 2010 12:34:41 PM Unfortunately you are mistaken. Your Motherboard is locked into 16x/4x mode, adding two cards will NOT split the bandwidth. As such, I would recommend against CrossFiring your GPU on this board. IF it could split to PCIe 2.0 8x/8x, it would have enough bandwidth.... staalkoppie February 1, 2010 12:42:41 PM is there any way to split the PCI slots so that the second PCi slot becomes x8? Related resources Best Xfire Mobo under 150$ US - Forum Help! x4 vs x8 lanes for a mid-range AMD Xfire /nVidia SLI setup! - Forum Motherboard bandwidth - Forum ATI Control Center doesn't detect 2 GPUs on Xfire system - Forum 2 HD5850s in Xfire and Physx Card/slots? - Forum Can't find your answer ? Ask ! Get the answer outlw6669 a b Ĉ ASUS a b V Motherboard February 1, 2010 12:44:43 PM Unfortunately not. There are only so many PCIe lanes wired to the second slot. No amount of fiddling can enable something that is not wired in staalkoppie February 1, 2010 12:54:49 PM Thank you outlw6669 for clearing that up....I am disappointed, but do understand. Tnx again Can't find your answer ? Ask ! Publish Related resources: ForumProblems While Streaming via Xfire ForumAsus 680 gtx full 3.0 bandwidth ? ForumATI HD 6770 & Mobo asus p35? ForumWhich ASUS mobo should i get for a 2500k i5? ForumCheapest but fastest Mobo for 6950's Xfire ForumXfire Question need help??? ForumATI 5850 xfire HELP! ForumXfire 6870's 2nd GPU values below setting ForumSLI/ Xfire mobo question ForumASUS 's QUAD x-fire mobo , QUAD cpu ready, WOW!! ForumWhat mobo should I get? I wont xFire or Sli, but will OC. ForumBest Motherboard for i7-3770 and GeForce 600 Ti? Forum[Solved] ASUS M4A77D ForumAsus a7m266-d problems ForumAsus m4a78t-e More resources Read discussions in other Motherboards categories BIOS Boot Chipsets ASRock Asus Chaintech DFI Elitegroup FIC Foxconn Gigabyte Intel MSI-Microstar !