Geforce GTX 770 vs Radeon R9 M265X

Intro

Compare those specifications to the Radeon R9 M265X, which comes with core clock speeds of 575 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Geforce GTX 770 is 212% faster than the Radeon R9 M265X in general, because of its greater bandwidth. (explain)

Geforce GTX 770		224384 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 152384 (212%)

Texel Rate

The Geforce GTX 770 will be much (about 482%) better at AF than the Radeon R9 M265X. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 110888 (482%)

Pixel Rate

If running with a high screen resolution is important to you, then the Geforce GTX 770 is superior to the Radeon R9 M265X, and very much so. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 24272 (264%)

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 maximum amount of information (counted in megabytes per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.