Radeon HD 7970 vs Radeon R9 M380

Intro

Compare those specs to the Radeon R9 M380, which features GPU core speed of 1000 MHz, and 4096 MB of GDDR5 RAM running at 1500 MHz through a 128-bit bus. It also features 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 7970 should theoretically be a lot better than the Radeon R9 M380 in general. (explain)

Radeon HD 7970		264000 MB/sec
Radeon R9 M380		96000 MB/sec
	Difference: 168000 (175%)

Texel Rate

The Radeon HD 7970 should be much (approximately 196%) better at anisotropic filtering than the Radeon R9 M380. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 78400 (196%)

Pixel Rate

The Radeon HD 7970 is quite a bit (about 85%) faster with regards to FSAA than the Radeon R9 M380, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 7970		29600 Mpixels/sec
Radeon R9 M380		16000 Mpixels/sec
	Difference: 13600 (85%)

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 (counted in MB per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the graphics 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 that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.