Radeon R9 290 vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which comes with core clock speeds of 750 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
Radeon R9 290		300 Watts
	Difference: 175 Watts (140%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 290 is 82% faster than the Radeon R9 M295X in general, due to its higher bandwidth. (explain)

Radeon R9 290		320000 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 144000 (82%)

Texel Rate

The Radeon R9 290 is much (more or less 33%) faster with regards to AF than the Radeon R9 M295X. (explain)

Radeon R9 290		128000 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 32000 (33%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 290 is a better choice, and very much so. (explain)

Radeon R9 290		51200 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 27200 (113%)

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 past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher 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 maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.