GeForce 8800 GTX vs Radeon R9 270X

Intro

Compare those specifications to the Radeon R9 270X, which features core clock speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 memory. 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 GTX		155 Watts
Radeon R9 270X		180 Watts
	Difference: 25 Watts (16%)

Memory Bandwidth

Performance-wise, the Radeon R9 270X should theoretically be much superior to the GeForce 8800 GTX overall. (explain)

Radeon R9 270X		179200 MB/sec
GeForce 8800 GTX		86400 MB/sec
	Difference: 92800 (107%)

Texel Rate

The Radeon R9 270X is quite a bit (about 117%) faster with regards to texture filtering than the GeForce 8800 GTX. (explain)

Radeon R9 270X		80000 Mtexels/sec
GeForce 8800 GTX		36800 Mtexels/sec
	Difference: 43200 (117%)

Pixel Rate

The Radeon R9 270X should be quite a bit (more or less 132%) more effective at anti-aliasing than the GeForce 8800 GTX, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 270X		32000 Mpixels/sec
GeForce 8800 GTX		13800 Mpixels/sec
	Difference: 18200 (132%)

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 maximum amount of information (measured in megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.