GeForce 820M vs Radeon R7 M260X

Intro

Compare that to the Radeon R7 M260X, which comes with a core clock frequency of 825 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It features 384 SPUs, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R7 M260X should theoretically be quite a bit faster than the GeForce 820M in general. (explain)

Radeon R7 M260X		64000 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 48000 (300%)

Texel Rate

The Radeon R7 M260X will be quite a bit (about 72%) faster with regards to anisotropic filtering than the GeForce 820M. (explain)

Radeon R7 M260X		19800 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 8296 (72%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R7 M260X is superior to the GeForce 820M, and very much so. (explain)

Radeon R7 M260X		6600 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 3724 (129%)

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 max amount of data (measured in MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 processed in one second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.