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. m 0 l Can't find your answer ? Ask ! Publish Related resources SolvedHD 4400 low gpu memory and bandwidth Forum SolvedProper connnection for mini DP to DP (monitor) for new GPU (and PSU question) Forum Need Help on PCIE Bandwidth Please & GPU PCIE Lane Usage - 4x / 8x / 16x Forum Will non-GPU pcie devices like soundcard lower bandwidth for GPU lanes? Forum SolvedRequest: How to interpret GPU specs, and why is one board "better" then the other? Forum SolvedSATA III Bandwidth w/Single GPU Forum CUDA card, NVIDIA GT 640 ddr5 same gpu chip different bandwidth for Asus and gainward Forum can i change the gpu bus bandwidth?? Forum (REPOST) low end GPU bandwidth question Forum memory bandwidth and gpu core question Forum Got Gigabyte R9 280x. Need a proper GPU test Forum GPU Bandwidth Question Forum Proper way of updating gpu drivers? Forum GPU running at lower bandwidth Forum SolvedGPU fan doesn't work properly Forum Gpu & pci express inteface bandwidth Forum SolvedHow to properly apply thermal compound to gpu Forum SolvedI'm not sure my GPU is working properly! Passmark Advanced 3D test! Forum GPU Bandwidth?? Are we using AGP8 yet?? Forum SolvedNew GPU cannot access BIOS/boot properly, but otherwise fine. 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 !