Radeon HD 7870 vs Radeon R9 M370X

Intro

Compare those specifications to the Radeon R9 M370X, which comes with a GPU core clock speed of 800 MHz, and 2048 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 7870 will be 113% quicker than the Radeon R9 M370X overall, due to its higher data rate. (explain)

Radeon HD 7870		153600 MB/sec
Radeon R9 M370X		72000 MB/sec
	Difference: 81600 (113%)

Texel Rate

The Radeon HD 7870 will be much (more or less 150%) more effective at texture filtering than the Radeon R9 M370X. (explain)

Radeon HD 7870		80000 Mtexels/sec
Radeon R9 M370X		32000 Mtexels/sec
	Difference: 48000 (150%)

Pixel Rate

The Radeon HD 7870 should be quite a bit (more or less 150%) more effective at anti-aliasing than the Radeon R9 M370X, and also should be capable of handling higher resolutions more effectively. (explain)

Radeon HD 7870		32000 Mpixels/sec
Radeon R9 M370X		12800 Mpixels/sec
	Difference: 19200 (150%)

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 megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few 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.