Radeon R9 295X2 vs Radeon R9 M280X

Intro

Compare those specs to the Radeon R9 M280X, which features core clock speeds of 900 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 RAM. It features 896 SPUs as well as 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 R9 295X2		500 Watts
	Difference: 425 Watts (567%)

Memory Bandwidth

In theory, the Radeon R9 295X2 should perform quite a bit faster than the Radeon R9 M280X overall. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 552000 (627%)

Texel Rate

The Radeon R9 295X2 should be quite a bit (approximately 611%) more effective at AF than the Radeon R9 M280X. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 307936 (611%)

Pixel Rate

The Radeon R9 295X2 should be much (approximately 805%) better at FSAA than the Radeon R9 M280X, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 115904 (805%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in one 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 - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.