Radeon R9 M290X vs Radeon R9 M295X

Intro

Compare all that to the Radeon R9 M295X, which features a clock speed of 750 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M290X		100 Watts
Radeon R9 M295X		125 Watts
	Difference: 25 Watts (25%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M295X should theoretically be a bit better than the Radeon R9 M290X in general. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon R9 M290X		153600 MB/sec
	Difference: 22400 (15%)

Texel Rate

The Radeon R9 M295X is much (about 41%) better at anisotropic filtering than the Radeon R9 M290X. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon R9 M290X		68000 Mtexels/sec
	Difference: 28000 (41%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 M290X is superior to the Radeon R9 M295X, though only just barely. (explain)

Radeon R9 M290X		27200 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 3200 (13%)

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 maximum amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. It's calculated 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 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of 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 applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip 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 number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.