Proper GPU bandwidth interpretation Tags: Graphics Cards Bandwidth PCI Express Graphics Last response: December 14, 2010 1:20 PM in Graphics & Displays Share stmpdyrd December 14, 2010 11:02:08 AM Hi All, I was researching on how GT 240 GDDR3 differed with its GDDR5 counterpart and if having PCI 1.0 -> 3.0 would matter as a bottleneck. Here are the bandwidth i got from wikipedia: PCI Express 1.0 (x32 link) = 64 Gbit/s 8 GB/s PCI Express 2.0 (x16 link) = 64 Gbit/s 8 GB/s PCI Express 3.0 (x16 link) = 102.4 Gbit/s 12.8 GB/s PCI Express 2.0 (x32 link) = 128 Gbit/s 16 GB/s What I want to understand is how the computation really works, since the rated Bandwidth, say for the GT 240 GDDR5, is at 54.4 GB/s, which is so much higher than those specified by the bus bandwidth capcities. http://en.wikipedia.org/wiki/GeForce_200_Series Help how to interpret these numbers? More about : proper gpu bandwidth interpretation eyefinity a b U Graphics card December 14, 2010 1:20:38 PM The card bandwidth is the memory bandwidth, it's got nothing to do with the pci-e slot. Can't find your answer ? Ask ! Publish Related resources : Forum76.8GB/s of memory bandwidth in 2004 ForumGPU ...which one to buy? Vote here and find out! ForumHow much bandwidth is essential for GTX 680 2-way SLI? ForumThe effective significance of memory bandwidth ? ForumGFlops vs memory bandwidth etc ForumUpgrading CPU, GPU , PSU ($3-400) input please ForumAsus MOBO Xfire Bandwidth ForumDoes the asus p8p67 pro support proper SLI Forumdifference in memory bandwidth ForumHow to find a proper Gen3 motherboard and what is the difference? ForumA Proper Phenom II vs i7 Review 5870 Crossfire FINALLY!!! ForumWhy is my 5870 Bandwidth is only 116.2GB/s? ForumAsus hd 6670 2gb ddr3 memory clock is showing 900 why ForumAGEIA is doomed ForumGPU or CPU overheating ForumUpgrading my GPU & PS need help HP Pavilion ForumBSOD 0x116 = Low IOH (NB) voltage, GPU issue need help with. ForumAsus gtx560ti directcuII-broken ForumPlease help with the right PSU GPU combo [260 dollars} ForumGPU-Z showing two GPU Temp readings 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 !