Compare any two graphics cards:
Radeon HD 6570 (OEM) 1GB vs Radeon R9 M375
IntroThe Radeon HD 6570 (OEM) 1GB uses a 40 nm design. AMD has set the core speed at 650 MHz. The GDDR3 memory is set to run at a frequency of 900 MHz on this model. It features 480 SPUs along with 24 Texture Address Units and 8 ROPs.
Compare all that to the Radeon R9 M375, which comes with a core clock speed of 1015 MHz and a DDR3 memory frequency of 1100 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
In theory, the Radeon R9 M375 should perform much faster than the Radeon HD 6570 (OEM) 1GB in general. (explain)
Texel RateThe Radeon R9 M375 is much (more or less 160%) better at AF than the Radeon HD 6570 (OEM) 1GB. (explain)
Pixel RateThe Radeon R9 M375 is much (more or less 212%) better at full screen anti-aliasing than the Radeon HD 6570 (OEM) 1GB, and will be able to handle higher screen 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.
Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. 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 number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.