Compare any two graphics cards:
GeForce GTS 450 1GB vs Radeon HD 4770
IntroThe GeForce GTS 450 1GB uses a 40 nm design. nVidia has set the core speed at 783 MHz. The GDDR5 RAM is set to run at a speed of 902 MHz on this model. It features 192 SPUs along with 32 Texture Address Units and 16 ROPs.
Compare all that to the Radeon HD 4770, which uses a 40 nm design. AMD has set the core speed at 750 MHz. The GDDR5 RAM works at a frequency of 800 MHz on this particular card. It features 640(128x5) SPUs along with 32 TAUs and 16 Rasterization Operator Units.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Performance-wise, the GeForce GTS 450 1GB should theoretically be a little bit better than the Radeon HD 4770 in general. (explain)
Texel RateThe GeForce GTS 450 1GB will be a little bit (about 4%) better at anisotropic filtering than the Radeon HD 4770. (explain)
Pixel RateThe GeForce GTS 450 1GB is a bit (about 4%) better at AA than the Radeon HD 4770, and also will be capable of handling higher screen resolutions while still performing well. (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 max amount of information (in units of MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.