Radeon HD 6790 vs Radeon R9 M365X

Intro

Compare those specifications to the Radeon R9 M365X, which makes use of a 28 nm design. AMD has set the core frequency at 925 MHz. The GDDR5 memory works at a speed of 1125 MHz on this particular model. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 6790 should in theory be much faster than the Radeon R9 M365X in general. (explain)

Radeon HD 6790		134400 MB/sec
Radeon R9 M365X		72000 MB/sec
	Difference: 62400 (87%)

Texel Rate

The Radeon R9 M365X will be just a bit (about 10%) faster with regards to texture filtering than the Radeon HD 6790. (explain)

Radeon R9 M365X		37000 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 3400 (10%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M365X is superior to the Radeon HD 6790, but it probably won't make a huge difference. (explain)

Radeon R9 M365X		14800 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 1360 (10%)

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 largest amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it should 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units of the card 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 max fill rate.