Compare any two graphics cards:
GeForce GT 240 GDDR5 vs Radeon HD 4750
IntroThe GeForce GT 240 GDDR5 makes use of a 40 nm design. nVidia has set the core speed at 550 MHz. The GDDR5 memory is set to run at a frequency of 850 MHz on this specific card. It features 96 SPUs as well as 32 Texture Address Units and 8 Rasterization Operator Units.
Compare all of that to the Radeon HD 4750, which has GPU clock speed of 730 MHz, and 512 MB of GDDR5 RAM set to run at 800 MHz through a 128-bit bus. It also is made up of 640(128x5) SPUs, 32 TAUs, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically, the GeForce GT 240 GDDR5 should perform a small bit faster than the Radeon HD 4750 in general. (explain)
Texel RateThe Radeon HD 4750 should be much (about 33%) more effective at AF than the GeForce GT 240 GDDR5. (explain)
Pixel RateThe Radeon HD 4750 will be much (approximately 165%) faster with regards to AA than the GeForce GT 240 GDDR5, and will be capable of handling higher resolutions without slowing down too much. (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.
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.
Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.
Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.