Radeon HD 7870 vs Radeon R9 M375

Intro

Compare those specs to the Radeon R9 M375, which comes with core speeds of 1015 MHz on the GPU, and 1100 MHz on the 4096 MB of DDR3 memory. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 7870 should theoretically be quite a bit faster than the Radeon R9 M375 overall. (explain)

Radeon HD 7870		153600 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 118400 (336%)

Texel Rate

The Radeon HD 7870 should be much (about 97%) more effective at AF than the Radeon R9 M375. (explain)

Radeon HD 7870		80000 Mtexels/sec
Radeon R9 M375		40600 Mtexels/sec
	Difference: 39400 (97%)

Pixel Rate

The Radeon HD 7870 will be quite a bit (about 97%) more effective at FSAA than the Radeon R9 M375, and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 7870		32000 Mpixels/sec
Radeon R9 M375		16240 Mpixels/sec
	Difference: 15760 (97%)

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 data (in units of MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 applied per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its 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 called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.