Compare any two graphics cards:
GeForce GT 220 GDDR3 vs Radeon HD 5570
IntroThe GeForce GT 220 GDDR3 has a GPU core clock speed of 625 MHz, and the 512 MB of GDDR3 RAM runs at 1012 MHz through a 128-bit bus. It also features 48 SPUs, 16 TAUs, and 8 ROPs.
Compare those specs to the Radeon HD 5570, which makes use of a 40 nm design. AMD has set the core speed at 650 MHz. The DDR3 memory runs at a speed of 900 MHz on this card. It features 400(80x5) SPUs along with 20 Texture Address Units and 8 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
As far as performance goes, the GeForce GT 220 GDDR3 should in theory be a bit superior to the Radeon HD 5570 in general. (explain)
Texel RateThe Radeon HD 5570 will be a lot (about 30%) better at AF than the GeForce GT 220 GDDR3. (explain)
Pixel RateThe Radeon HD 5570 will be a small bit (about 4%) faster with regards to full screen anti-aliasing than the GeForce GT 220 GDDR3, and should be capable of handling higher 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 largest amount of data (counted in MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of 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 processed per second.
Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.