GeForce 8800 GTS (G80) 640MB vs Radeon R7 M260X

Intro

Compare all of that to the Radeon R7 M260X, which has a clock frequency of 825 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It features 384 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R7 M260X should in theory be a small bit better than the GeForce 8800 GTS (G80) 640MB overall. (explain)

Radeon R7 M260X		64000 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 640 (1%)

Texel Rate

The GeForce 8800 GTS (G80) 640MB is quite a bit (approximately 24%) better at texture filtering than the Radeon R7 M260X. (explain)

GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
Radeon R7 M260X		19800 Mtexels/sec
	Difference: 4824 (24%)

Pixel Rate

The GeForce 8800 GTS (G80) 640MB will be a lot (approximately 55%) better at AA than the Radeon R7 M260X, and also capable of handling higher screen resolutions more effectively. (explain)

GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
Radeon R7 M260X		6600 Mpixels/sec
	Difference: 3660 (55%)

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 (counted in megabytes per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units of the card by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.