Radeon R9 M290X vs Radeon R9 M395X

Intro

Compare those specifications to the Radeon R9 M395X, which comes with GPU core speed of 723 MHz, and 4096 MB of GDDR5 memory running at 1250 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M290X		100 Watts
Radeon R9 M395X		125 Watts
	Difference: 25 Watts (25%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M395X should theoretically be a small bit superior to the Radeon R9 M290X in general. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon R9 M290X		153600 MB/sec
	Difference: 6400 (4%)

Texel Rate

The Radeon R9 M395X is much (about 36%) faster with regards to texture filtering than the Radeon R9 M290X. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon R9 M290X		68000 Mtexels/sec
	Difference: 24544 (36%)

Pixel Rate

The Radeon R9 M290X will be a little bit (about 18%) more effective at anti-aliasing than the Radeon R9 M395X, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 M290X		27200 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 4064 (18%)

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 max amount of data (measured in megabytes per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units by the core 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.