Radeon HD 5870 vs Radeon R9 M375X

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 5870 should in theory be much superior to the Radeon R9 M375X in general. (explain)

Radeon HD 5870		153600 MB/sec
Radeon R9 M375X		72000 MB/sec
	Difference: 81600 (113%)

Texel Rate

The Radeon HD 5870 is much (about 67%) faster with regards to AF than the Radeon R9 M375X. (explain)

Radeon HD 5870		68000 Mtexels/sec
Radeon R9 M375X		40600 Mtexels/sec
	Difference: 27400 (67%)

Pixel Rate

The Radeon HD 5870 will be quite a bit (approximately 67%) faster with regards to AA than the Radeon R9 M375X, and should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 5870		27200 Mpixels/sec
Radeon R9 M375X		16240 Mpixels/sec
	Difference: 10960 (67%)

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 (measured in MB per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.