What is CF in X4 mode and X8 Tags: Graphics Cards Radeon Graphics Last response: June 14, 2012 11:31 AM in Graphics & Displays Share imranfarid99 June 12, 2012 11:47:09 AM What is CF in X4 mode and X8 .......because i find only x4 modes in most budget H77 boards ........its for my friend he has two ATI Radeon 6770's and he wants to CF them........Plz help me with this X4 and X8 More about : mode po1nted June 12, 2012 11:56:15 AM 4x and 8x refers to the speed of the bus. Hence, you are finding the lower speed in most budget boards. If you can spring the cash go for the 8x. But 4x should perform well in most cases, also. For 6770s the 4x should be fine. m 0 l geekapproved a b U Graphics card June 12, 2012 11:59:14 AM You can't crossfire on a budget H77. m 0 l Related resources Limited by Crossfire only MB, PSIe2.0 x8 in CF mode, what AMD GPU? - Forum Will pci-e 2.0 @2 times x16 lane cf/sli be faster than x8 mode 2.0 - Forum PCI-E CF x4 or x8 that much of a difference? - Forum What is PCI Express x4 in x8? - Forum What is x4 x6 x8 in computer hardware - Forum Can't find your answer ? Ask ! Get the answer geekapproved a b U Graphics card June 12, 2012 1:25:17 PM Depends on the card, game/benchmark and what version of PCI-E were talking about (1, 2, or 3) Worst case scenario, a GTX680 loses 27% of it's performance using a PCI-E 1.1 slot at 4x. A HD7970 in the same scenario loses 14%. Today's PCI-E 3.0 slots at 4x have as much bandwidth of a PCI-E 2.0 slot at 8x, which is just fine. http://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI... m 0 l imranfarid99 June 14, 2012 11:31:56 AM The Motherboard is http://www.asus.com/Motherboards/Intel_Socket_1155/P8H7... is a 6770 CF in this setup better than a GTX 560ti.....how much m 0 l Can't find your answer ? Ask ! Publish Related resources SolvedI need help understanding PCI-E x16, x8, x4 and x1 Forum SolvedAny Z97 motherboards with 2x PCI x8 and 1x PCI x4 running at the same time Forum SolvedPCIe 3.0 x16 x8 x4 Forum SolvedASRock 970 Extreme4 Crossfire (PCIe x16, x8, x4?!) Forum Solvedx16 + x4 vs x16 + x8 Forum SolvedPCI Express Cards? x1 x4 x8 x16 Forum What is PCIe 2.0 x16 slot operates in x4 mode? for SLI. Forum SolvedHow bad is my Phenom X4 945 bottlenecking me with 280x CF? Forum SolvedPCIe x4 card in a x8 slot Forum SolvedPCI-E lanes (x4 vs x8) any major difference? Forum SolvedPCIe-2.0 x16 (x4 mode) Scaling Bandwidth Ratio Forum SolvedPcie x1, x4, x8, x16... Forum PCIe 3.0 x8 card in PCIe 2.0 x16 slot: will it run in PCIe 2.0 x8 or x16 mode? Forum PCIe X4 card in a X8 slot Forum SolvedWill a Phenom II x4 OC'd to 3.7 ghz bottleneck R9270X CF? Forum 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 !