Radeon HD 7950 vs Radeon R9 M280X

Intro

Compare that to the Radeon R9 M280X, which features a clock frequency of 900 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It features 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

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

Theoretically speaking, the Radeon HD 7950 is 173% faster than the Radeon R9 M280X overall, due to its greater 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 much (about 78%) more effective at anisotropic filtering 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 should be much (approximately 78%) more effective at FSAA than the Radeon R9 M280X, and also should be capable of handling higher resolutions without slowing down too much. (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: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transported over 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 should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR 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 figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.