GeForce 820M vs Radeon R9 M375

Intro

Compare that to the Radeon R9 M375, which comes with a clock speed of 1015 MHz and a DDR3 memory speed of 1100 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M375 should theoretically perform quite a bit faster than the GeForce 820M overall. (explain)

Radeon R9 M375		35200 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 19200 (120%)

Texel Rate

The Radeon R9 M375 should be much (approximately 253%) faster with regards to anisotropic filtering than the GeForce 820M. (explain)

Radeon R9 M375		40600 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 29096 (253%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M375 is a better choice, by a large margin. (explain)

Radeon R9 M375		16240 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 13364 (465%)

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 megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.