Compare any two graphics cards:
Radeon HD 6570 (OEM) 2GB vs Radeon R7 240
IntroThe Radeon HD 6570 (OEM) 2GB uses a 40 nm design. AMD has clocked the core frequency at 650 MHz. The GDDR5 RAM works at a speed of 1000 MHz on this model. It features 480 SPUs as well as 24 TAUs and 8 Rasterization Operator Units.
Compare that to the Radeon R7 240, which features GPU core speed of 730 MHz, and 2048 MB of DDR3 RAM set to run at 900 MHz through a 128-bit bus. It also is made up of 320 SPUs, 20 TAUs, and 8 Raster Operation Units.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
In theory, the Radeon HD 6570 (OEM) 2GB should be 122% faster than the Radeon R7 240 overall, due to its greater bandwidth. (explain)
Texel RateThe Radeon HD 6570 (OEM) 2GB is a bit (about 7%) more effective at AF than the Radeon R7 240. (explain)
Pixel RateIf using high levels of AA is important to you, then the Radeon R7 240 is superior to the Radeon HD 6570 (OEM) 2GB, but not by far. (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 (in units of MB per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling 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 card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.