Radeon HD 7950 vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which uses a 28 nm design. AMD has clocked the core speed at 750 MHz. The GDDR5 memory is set to run at a speed of 1375 MHz on this particular card. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
Radeon HD 7950		200 Watts
	Difference: 75 Watts (60%)

Memory Bandwidth

In theory, the Radeon HD 7950 should perform much faster than the Radeon R9 M295X in general. (explain)

Radeon HD 7950		240000 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 64000 (36%)

Texel Rate

The Radeon R9 M295X will be a small bit (about 7%) better at texture filtering than the Radeon HD 7950. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon HD 7950		89600 Mtexels/sec
	Difference: 6400 (7%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7950 is the winner, not by a very large margin though. (explain)

Radeon HD 7950		25600 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 1600 (7%)

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: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. 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 card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This 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 card will be at handling 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 video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.