Radeon R9 M290X vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which has a GPU core clock speed of 750 MHz, and 4096 MB of GDDR5 RAM running at 1375 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 Texture Address Units, 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

In theory, the Radeon R9 M295X should be 15% faster than the Radeon R9 M290X in general, because of its higher bandwidth. (explain)

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

Texel Rate

The Radeon R9 M295X will be quite a bit (more or less 41%) faster with regards to 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

The Radeon R9 M290X is a bit (about 13%) more effective at AA than the Radeon R9 M295X, and also capable of handling higher screen resolutions more effectively. (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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at 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 that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core 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 is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.