Radeon HD 6870 vs Radeon R9 M375

Intro

Compare those specs to the Radeon R9 M375, which features a clock speed of 1015 MHz and a DDR3 memory speed of 1100 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 6870, in theory, should be quite a bit faster than the Radeon R9 M375 overall. (explain)

Radeon HD 6870		134400 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 99200 (282%)

Texel Rate

The Radeon HD 6870 is quite a bit (about 24%) more effective at anisotropic filtering than the Radeon R9 M375. (explain)

Radeon HD 6870		50400 Mtexels/sec
Radeon R9 M375		40600 Mtexels/sec
	Difference: 9800 (24%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6870 is superior to the Radeon R9 M375, by a large margin. (explain)

Radeon HD 6870		28800 Mpixels/sec
Radeon R9 M375		16240 Mpixels/sec
	Difference: 12560 (77%)

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 (in units of MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 can be applied per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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