Compare any two graphics cards:
GeForce 9500 GT 512MB GDDR3 vs GeForce GT 640 DDR3
IntroThe GeForce 9500 GT 512MB GDDR3 has a core clock speed of 550 MHz and a GDDR3 memory speed of 800 MHz. It also makes use of a 128-bit memory bus, and uses a 55 nm design. It is comprised of 32 SPUs, 16 TAUs, and 8 Raster Operation Units.Compare those specifications to the GeForce GT 640 DDR3, which features a clock speed of 900 MHz and a DDR3 memory frequency of 1782 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 384 SPUs, 32 Texture Address Units, and 16 ROPs.
Display Graphs
Power Usage and Theoretical BenchmarksPower Consumption (Max TDP)
Memory BandwidthIn theory, the GeForce GT 640 DDR3 will be 123% faster than the GeForce 9500 GT 512MB GDDR3 overall, due to its greater data rate. (explain)
Texel RateThe GeForce GT 640 DDR3 should be a lot (approximately 227%) more effective at texture filtering than the GeForce 9500 GT 512MB GDDR3. (explain)
Pixel RateThe GeForce GT 640 DDR3 will be quite a bit (more or less 227%) more effective at full screen anti-aliasing than the GeForce 9500 GT 512MB GDDR3, and will be capable of handling higher resolutions better. (explain)
Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit. Price Comparison
Display Prices
Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though. Specifications
Display Specifications
Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions. Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second. Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.
Display Prices
Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.
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