Compare any two graphics cards:
GeForce 9600 GSO 384MB vs Radeon R7 M265
IntroThe GeForce 9600 GSO 384MB features a GPU core speed of 550 MHz, and the 384 MB of GDDR3 memory is set to run at 800 MHz through a 192-bit bus. It also is comprised of 96 Stream Processors, 48 TAUs, and 12 ROPs.
Compare those specs to the Radeon R7 M265, which comes with GPU clock speed of 725 MHz, and 2048 MB of DDR3 RAM set to run at 1000 MHz through a 128-bit bus. It also is made up of 384 SPUs, 24 Texture Address Units, and 8 ROPs.
Power Usage and Theoretical Benchmarks
In theory, the GeForce 9600 GSO 384MB will be 20% quicker than the Radeon R7 M265 in general, because of its higher bandwidth. (explain)
Texel RateThe GeForce 9600 GSO 384MB should be much (approximately 52%) faster with regards to AF than the Radeon R7 M265. (explain)
Pixel RateIf using a high resolution is important to you, then the GeForce 9600 GSO 384MB is a better choice, though only just barely. (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 largest amount of information (in units of MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.
Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.