Compare any two graphics cards:
GeForce GT 220 GDDR3 vs GeForce GTS 450 1GB
IntroThe GeForce GT 220 GDDR3 comes with a GPU core clock speed of 625 MHz, and the 512 MB of GDDR3 memory is set to run at 1012 MHz through a 128-bit bus. It also features 48 SPUs, 16 Texture Address Units, and 8 ROPs.
Compare all of that to the GeForce GTS 450 1GB, which comes with a clock frequency of 783 MHz and a GDDR5 memory speed of 902 MHz. It also features a 128-bit memory bus, and uses a 40 nm design. It features 192 SPUs, 32 TAUs, and 16 Raster Operation 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 quite a bit better than the GeForce GT 220 GDDR3 in general. (explain)
Texel RateThe GeForce GTS 450 1GB is much (more or less 151%) better at texture filtering than the GeForce GT 220 GDDR3. (explain)
Pixel RateThe GeForce GTS 450 1GB will be a lot (more or less 151%) better at FSAA than the GeForce GT 220 GDDR3, and able to handle 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 moved across the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total number of texture units of the card 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 in a second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour 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 output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.