GeForce 8800 GTS (G80) 320MB vs Radeon R9 270X

Intro

Compare all that to the Radeon R9 270X, which features core speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs along with 80 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 320MB		143 Watts
Radeon R9 270X		180 Watts
	Difference: 37 Watts (26%)

Memory Bandwidth

In theory, the Radeon R9 270X should be much faster than the GeForce 8800 GTS (G80) 320MB in general. (explain)

Radeon R9 270X		179200 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 115840 (183%)

Texel Rate

The Radeon R9 270X will be much (more or less 225%) more effective at anisotropic filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

Radeon R9 270X		80000 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 55376 (225%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 270X is a better choice, by far. (explain)

Radeon R9 270X		32000 Mpixels/sec
GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
	Difference: 21740 (212%)

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 megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, 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 number of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.