Radeon R9 390X 8G vs Radeon R9 M295X

Intro

Compare all that to the Radeon R9 M295X, which features clock speeds of 750 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 150 Watts (120%)

Memory Bandwidth

Theoretically, the Radeon R9 390X 8G should be quite a bit faster than the Radeon R9 M295X in general. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 208000 (118%)

Texel Rate

The Radeon R9 390X 8G will be quite a bit (approximately 93%) more effective at texture filtering than the Radeon R9 M295X. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 88800 (93%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 390X 8G is superior to the Radeon R9 M295X, by a large margin. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 43200 (180%)

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 maximum amount of data (measured in megabytes per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

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