Radeon HD 6790 vs Radeon R9 M375

Intro

Compare those specs to the Radeon R9 M375, which has GPU core speed of 1015 MHz, and 4096 MB of DDR3 RAM running at 1100 MHz through a 128-bit bus. It also features 640 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 6790 should in theory be a lot better than the Radeon R9 M375 in general. (explain)

Radeon HD 6790		134400 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 99200 (282%)

Texel Rate

The Radeon R9 M375 will be a lot (more or less 21%) better at anisotropic filtering than the Radeon HD 6790. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 7000 (21%)

Pixel Rate

The Radeon R9 M375 will be quite a bit (more or less 21%) faster with regards to anti-aliasing than the Radeon HD 6790, and will be able to handle higher resolutions better. (explain)

Radeon R9 M375		16240 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 2800 (21%)

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 transferred over the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics 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 chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. 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 maximum fill rate.