Geforce GTX 670 vs Radeon R9 M275X

Intro

Compare those specifications to the Radeon R9 M275X, which has core speeds of 900 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs as well as 40 Texture Address Units 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 GTX 670		170 Watts
	Difference: 120 Watts (240%)

Memory Bandwidth

The Geforce GTX 670 should in theory perform much faster than the Radeon R9 M275X in general. (explain)

Geforce GTX 670		192000 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 120000 (167%)

Texel Rate

The Geforce GTX 670 will be much (more or less 185%) faster with regards to texture filtering than the Radeon R9 M275X. (explain)

Geforce GTX 670		102480 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 66480 (185%)

Pixel Rate

If running with a high screen resolution is important to you, then the Geforce GTX 670 is superior to the Radeon R9 M275X, by a large margin. (explain)

Geforce GTX 670		29280 Mpixels/sec
Radeon R9 M275X		14400 Mpixels/sec
	Difference: 14880 (103%)

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 information (measured in megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 applied per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, 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 most pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.