Radeon HD 6870 vs Radeon R9 M370X

Intro

Compare those specifications to the Radeon R9 M370X, which has a clock frequency of 800 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 6870 should in theory perform quite a bit faster than the Radeon R9 M370X overall. (explain)

Radeon HD 6870		134400 MB/sec
Radeon R9 M370X		72000 MB/sec
	Difference: 62400 (87%)

Texel Rate

The Radeon HD 6870 should be quite a bit (approximately 58%) more effective at AF than the Radeon R9 M370X. (explain)

Radeon HD 6870		50400 Mtexels/sec
Radeon R9 M370X		32000 Mtexels/sec
	Difference: 18400 (58%)

Pixel Rate

The Radeon HD 6870 will be much (approximately 125%) better at full screen anti-aliasing than the Radeon R9 M370X, and also should be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 6870		28800 Mpixels/sec
Radeon R9 M370X		12800 Mpixels/sec
	Difference: 16000 (125%)

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 maximum amount of information (counted in MB per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.