Compare any two graphics cards:
GeForce GTX 650 vs Radeon HD 6970
IntroThe GeForce GTX 650 has a GPU core clock speed of 1058 MHz, and the 2048 MB of GDDR5 RAM runs at 1250 MHz through a 128-bit bus. It also features 384 SPUs, 32 Texture Address Units, and 16 ROPs.
Compare those specs to the Radeon HD 6970, which uses a 40 nm design. ATi has set the core speed at 880 MHz. The GDDR5 memory runs at a speed of 1375 MHz on this particular card. It features 1536 SPUs along with 96 Texture Address Units and 32 ROPs.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically speaking, the Radeon HD 6970 will be 120% faster than the GeForce GTX 650 overall, due to its greater bandwidth. (explain)
Texel RateThe Radeon HD 6970 will be quite a bit (more or less 150%) more effective at texture filtering than the GeForce GTX 650. (explain)
Pixel RateThe Radeon HD 6970 should be much (about 66%) better at full screen anti-aliasing than the GeForce GTX 650, and also will be capable of handling higher screen resolutions without losing too much performance. (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 ComparisonPlease note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
Memory Bandwidth: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.