Geforce GTX 770 vs Radeon R9 M295X

Intro

Compare all that to the Radeon R9 M295X, which features a clock frequency of 750 MHz and a GDDR5 memory frequency of 1375 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
Geforce GTX 770		230 Watts
	Difference: 105 Watts (84%)

Memory Bandwidth

Theoretically, the Geforce GTX 770 should be quite a bit faster than the Radeon R9 M295X in general. (explain)

Geforce GTX 770		224384 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 48384 (27%)

Texel Rate

The Geforce GTX 770 is quite a bit (approximately 39%) faster with regards to anisotropic filtering than the Radeon R9 M295X. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 37888 (39%)

Pixel Rate

The Geforce GTX 770 will be much (about 39%) faster with regards to FSAA than the Radeon R9 M295X, and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 9472 (39%)

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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write 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 - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.