Compare any two graphics cards:
Radeon HD 4830 512MB vs Radeon R7 M260X
IntroThe Radeon HD 4830 512MB uses a 55 nm design. AMD has set the core speed at 575 MHz. The GDDR3 memory runs at a frequency of 900 MHz on this particular model. It features 640(128x5) SPUs along with 32 TAUs and 16 Rasterization Operator Units.
Compare those specs to the Radeon R7 M260X, which has core clock speeds of 825 MHz on the GPU, and 1000 MHz on the 2048 MB of GDDR5 memory. It features 384 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
In theory, the Radeon R7 M260X should be 11% quicker than the Radeon HD 4830 512MB overall, because of its higher data rate. (explain)
Texel RateThe Radeon R7 M260X is a little bit (more or less 8%) better at anisotropic filtering than the Radeon HD 4830 512MB. (explain)
Pixel RateThe Radeon HD 4830 512MB is much (approximately 39%) more effective at full screen anti-aliasing than the Radeon R7 M260X, and should be capable of handling higher resolutions more effectively. (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 (in units of MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics 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 most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. 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 output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.