GeForce GT 240 GDDR5 vs Radeon R9 M275X

Intro

Compare all that to the Radeon R9 M275X, which features core speeds of 900 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
GeForce GT 240 GDDR5		70 Watts
	Difference: 20 Watts (40%)

Memory Bandwidth

Performance-wise, the Radeon R9 M275X should in theory be much better than the GeForce GT 240 GDDR5 in general. (explain)

Radeon R9 M275X		72000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 17600 (32%)

Texel Rate

The Radeon R9 M275X should be a lot (more or less 105%) better at texture filtering than the GeForce GT 240 GDDR5. (explain)

Radeon R9 M275X		36000 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 18400 (105%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M275X is the winner, by a large margin. (explain)

Radeon R9 M275X		14400 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 10000 (227%)

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 max amount of data (measured in MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill 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 get to the maximum fill rate.