Compare any two graphics cards:
GeForce GT 220 GDDR3 vs GeForce GTS 450 1GB
IntroThe GeForce GT 220 GDDR3 makes use of a 40 nm design. nVidia has clocked the core speed at 625 MHz. The GDDR3 RAM works at a speed of 1012 MHz on this model. It features 48 SPUs as well as 16 Texture Address Units and 8 ROPs.
Compare all of that to the GeForce GTS 450 1GB, which makes use of 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 specific model. It features 192 SPUs along with 32 Texture Address Units and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
The GeForce GTS 450 1GB should in theory be a lot faster than the GeForce GT 220 GDDR3 in general. (explain)
Texel RateThe GeForce GTS 450 1GB will be much (about 151%) more effective at AF than the GeForce GT 220 GDDR3. (explain)
Pixel RateIf running with a high screen resolution is important to you, then the GeForce GTS 450 1GB is superior to the GeForce GT 220 GDDR3, by a large margin. (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 data (counted in megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.