GeForce GTX 275 vs Radeon R9 M290X

Intro

Compare those specs to the Radeon R9 M290X, which has clock speeds of 850 MHz on the GPU, and 1200 MHz on the 4096 MB of GDDR5 memory. It features 1280 SPUs as well as 80 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M290X		100 Watts
GeForce GTX 275		219 Watts
	Difference: 119 Watts (119%)

Memory Bandwidth

The Radeon R9 M290X, in theory, should be much faster than the GeForce GTX 275 in general. (explain)

Radeon R9 M290X		153600 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 26592 (21%)

Texel Rate

The Radeon R9 M290X will be quite a bit (more or less 34%) faster with regards to AF than the GeForce GTX 275. (explain)

Radeon R9 M290X		68000 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 17360 (34%)

Pixel Rate

The Radeon R9 M290X will be much (more or less 53%) better at AA than the GeForce GTX 275, and able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 M290X		27200 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 9476 (53%)

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 (counted in MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 can be processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.