GeForce GTX 650 vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which has a GPU core clock speed of 750 MHz, and 4096 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon R9 M295X		125 Watts
	Difference: 61 Watts (95%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M295X should be 120% quicker than the GeForce GTX 650 in general, due to its greater bandwidth. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 96000 (120%)

Texel Rate

The Radeon R9 M295X is quite a bit (more or less 184%) faster with regards to AF than the GeForce GTX 650. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 62144 (184%)

Pixel Rate

The Radeon R9 M295X will be quite a bit (about 42%) faster with regards to anti-aliasing than the GeForce GTX 650, and also able to handle higher resolutions without slowing down too much. (explain)

Radeon R9 M295X		24000 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 7072 (42%)

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.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 are applied per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.