X4/x4 SLI Offers > 80% performance of x16/x16 SLI Tags: Graphics Cards Performance SLI Motherboards PCI Express Graphics Last response: September 3, 2010 1:08 PM in Graphics & Displays Share Lmeow a b U Graphics card a b V Motherboard September 3, 2010 6:15:39 AM I'm kind of surprised. http://www.hardocp.com/article/2010/08/25/gtx_480_sli_p... This was released a week ago... GTX 480s in SLI x4/x4 mode show more than 80% performance overall compared to GTX 480 SLI x16/x16, and most of the time it's 90% or higher. PCI-E 2.0 x4/x4 is the same as PCI-E 1.1 x8/x8, so older motherboard users won't have much performance loss either it seems. Seems like those who intend to buy a x16/x4 PCI-E 2.0 board shouldn't be too discouraged if they want to CrossFireX or SLI for that matter (x16/x4 boards generally aren't SLI certified though). Be careful with P55 motherboards - the x4 slot is PCI-E 1.1 and offers half the bandwidth, which I would say would impact on performance. What do you guys think? More about : sli offers performance x16 x16 sli Maziar a c 169 U Graphics card a c 135 V Motherboard September 3, 2010 7:31:12 AM Thanks for the link, it seems that PCI-E 2.0 really makes a difference in CF performance,because dual x16/x8 performed much better than x16x4 with PCI-E 1.0 cards. Lmeow a b U Graphics card a b V Motherboard September 3, 2010 8:11:43 AM Welcome Maziar. This means I can go for a GTX 470 or something high end later on this year and next year adding another in CFX or SLI should work quite well. Related resources 1Gb vs 2Gb graphics - Forum SLI setup on X58A UD3R system - Forum SLI Bridge? - Forum [Solved] Will i5-650 and P55 bottleneck 2 460GTX SLI config? - Forum [Solved] Do AMD Motherboards Support nVidia Card's Without SLI? - Forum Can't find your answer ? Ask ! Get the answer Helltech a c 153 U Graphics card September 3, 2010 8:42:07 AM Does CF still perform horribly at x4, is this just an SLI thing? I could have sworn (like Maziar said) I saw benchmarks where x4 with CF had really bad performance. Lmeow a b U Graphics card a b V Motherboard September 3, 2010 11:06:35 AM The PCI-E x4 lanes may have been PCI-E 1.0/1.1 which would probably bottleneck the cards then. Mousemonkey a c 271 U Graphics card a b V Motherboard September 3, 2010 1:08:42 PM The x4/x4 setup seems to affect the minimum framerates more than anything but even so that's only on "some" titles, interesting results nonetheless. Can't find your answer ? Ask ! Publish Related resources Why are some mobos only for SLI and others only for Crossfire? Forum [Solved] Dual SLI Forum Sli for a newbie pc owner or not?! Forum Is My Q9650@3.75GHz Bottle Necking my GTX 460's in SLI Forum [Solved] BFG GeForce 8800GTX 768MB GDDR3 PCI Express x16 still does the job on newer game 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 !