Radeon HD 7970 vs Radeon R9 M375X

Intro

Compare those specifications to the Radeon R9 M375X, which features a clock speed of 1015 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 7970 should theoretically be much better than the Radeon R9 M375X overall. (explain)

Radeon HD 7970		264000 MB/sec
Radeon R9 M375X		72000 MB/sec
	Difference: 192000 (267%)

Texel Rate

The Radeon HD 7970 will be quite a bit (more or less 192%) better at anisotropic filtering than the Radeon R9 M375X. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon R9 M375X		40600 Mtexels/sec
	Difference: 77800 (192%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7970 is the winner, and very much so. (explain)

Radeon HD 7970		29600 Mpixels/sec
Radeon R9 M375X		16240 Mpixels/sec
	Difference: 13360 (82%)

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 largest amount of information (in units of MB per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the 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 in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock 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 maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock 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 rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.