Pingback: EVGA GeForce GTX 580 SC Review - 3D Tech News, Pixel Hacking, Data Visualization and 3D Programming. Pingback: SAPPHIRE Radeon HD 6870 1024MB Review - 3D Tech News, Pixel Hacking, Data Visualization and 3D Programming. Pingback: ASUS ENGTX580 1536MB at Geeks3D Labs - 3D Tech News, Pixel Hacking, Data Visualization and 3D Programming. I hope the memory speed you see in graphics cards reviews or in your favorite GPU tool is clear now. Or the new GPU Shark display the effective DDR speed: For exemple, NVIDIA displays the effective memory speed of the GTX 480 as a DDR speed (1848MHz) instead of a QDR speed (3696MHz) (see specicifications HERE).Īnd what kind of speed is displayed in our GPU tools ?Īs we said, GPU-Z displays the real clock speed. IN practice, very often, the DDR speed is used in the specs of GDDR5 memory. Then for a GTX 480 (GDDR5) with stock memory speed we have: For example, the GDDR3 memory (on GTX 200 for example) is a DDR memory while the GDDR5 (on HD 5000 or GTX 400) is a QDR memory.Īnd the effective speed of a QDR memory is: Roughly said, there are 2 kinds of graphics memory currently in use: DDR (Double Data Rate) and QDR (Quad Data Rate or Quad-pumped). All other values you can read in other GPU tools or graphics cards reviews are the effective speed which depends on the type of memory (GDDR3, GDDR5) and people who have witten the specs, the reviews or the GPU tools 😉 The real memory speed is the most important information.

GPU-Z displays the real memory clock frequency or memory speed which is 950MHz (this is an overclocked memory since the stock speed of a GTX 480 is 924MHz). If we look at the image, we see that GPU-Z is used to monitoring the clocks and temperature. The guy who sent the image asked me why the memory clock of his GTX 480 is 950MHz instead of 1900Mhz. I think the system has a problem (look at the nice temperature spikes – may come from a bug in GPU-Z, I don’t know) but don’t ask me what’s kid of prob 😉 Hummm tortured is not really appropriate if we look at the current intensity and GPU power: 27A and 29W… And the FPS: 34 FPS is too low for a GTX 480 even with MSAA enabled. I recently received this strange image of a GTX 480 tortured by FurMark.įurMark and an overclocked EVGA GTX 480 – Temperature spikes

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