GeForce GTX 870M vs Radeon R9 M375

Intro

Compare all of that to the Radeon R9 M375, which comes with a GPU core clock speed of 1015 MHz, and 4096 MB of DDR3 RAM running at 1100 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX 870M is 173% faster than the Radeon R9 M375 overall, because of its higher data rate. (explain)

GeForce GTX 870M		96000 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 60800 (173%)

Texel Rate

The GeForce GTX 870M will be much (approximately 160%) more effective at anisotropic filtering than the Radeon R9 M375. (explain)

GeForce GTX 870M		105392 Mtexels/sec
Radeon R9 M375		40600 Mtexels/sec
	Difference: 64792 (160%)

Pixel Rate

The GeForce GTX 870M should be quite a bit (about 39%) more effective at AA than the Radeon R9 M375, and also should be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 870M		22584 Mpixels/sec
Radeon R9 M375		16240 Mpixels/sec
	Difference: 6344 (39%)

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 across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, the result 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 AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.