Radeon R7 250 vs Radeon R9 M395X

Intro

Compare all that to the Radeon R9 M395X, which uses a 28 nm design. AMD has set the core frequency at 723 MHz. The GDDR5 RAM runs at a speed of 1250 MHz on this model. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
Radeon R9 M395X		125 Watts
	Difference: 60 Watts (92%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M395X should theoretically be much better than the Radeon R7 250 in general. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 86400 (117%)

Texel Rate

The Radeon R9 M395X will be quite a bit (more or less 286%) faster with regards to texture filtering than the Radeon R7 250. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 68544 (286%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M395X is superior to the Radeon R7 250, and very much so. (explain)

Radeon R9 M395X		23136 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 15136 (189%)

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 (measured in megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the 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 the card's 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.