Radeon R9 M290X vs Radeon R9 M395X

Intro

Compare that to the Radeon R9 M395X, which comes with a clock frequency of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, 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

In theory, the Radeon R9 M395X should perform a bit faster than 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 a lot (about 36%) faster with regards to anisotropic 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 full screen anti-aliasing than the Radeon R9 M395X, and will be capable of handling higher resolutions without losing too much performance. (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: Bandwidth is the largest amount of information (counted in megabytes per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 processed per second. This number is calculated by multiplying the total amount of texture units 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.