Compare any two graphics cards:
GeForce GTX 550 Ti vs Radeon HD 4870 2GB
IntroThe GeForce GTX 550 Ti has a core clock frequency of 900 MHz and a GDDR5 memory speed of 1026 MHz. It also features a 192-bit bus, and uses a 40 nm design. It is made up of 192 SPUs, 32 TAUs, and 24 Raster Operation Units.
Compare that to the Radeon HD 4870 2GB, which makes use of a 55 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR5 memory is set to run at a speed of 900 MHz on this particular card. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically speaking, the Radeon HD 4870 2GB will be 17% quicker than the GeForce GTX 550 Ti overall, because of its greater data rate. (explain)
Texel RateThe Radeon HD 4870 2GB will be a little bit (approximately 4%) more effective at anisotropic filtering than the GeForce GTX 550 Ti. (explain)
Pixel RateThe GeForce GTX 550 Ti should be much (approximately 80%) better at full screen anti-aliasing than the Radeon HD 4870 2GB, and should 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 maximum amount of information (measured in MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 can be applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics 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 maximum amount of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number 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 fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.