Radeon HD 7950 vs Radeon R9 M280X

Intro

Compare those specs to the Radeon R9 M280X, which comes with GPU clock speed of 900 MHz, and 4096 MB of GDDR5 RAM running at 1375 MHz through a 128-bit bus. It also is made up of 896 Stream Processors, 56 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon HD 7950		200 Watts
	Difference: 125 Watts (167%)

Memory Bandwidth

In theory, the Radeon HD 7950 is 173% quicker than the Radeon R9 M280X in general, due to its higher bandwidth. (explain)

Radeon HD 7950		240000 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 152000 (173%)

Texel Rate

The Radeon HD 7950 will be a lot (about 78%) better at AF than the Radeon R9 M280X. (explain)

Radeon HD 7950		89600 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 39200 (78%)

Pixel Rate

The Radeon HD 7950 is quite a bit (more or less 78%) better at AA than the Radeon R9 M280X, and will be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 7950		25600 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 11200 (78%)

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 information (in units of MB per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines 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 quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.