GeForce 820M vs Radeon R7 M260X

Intro

Compare those specs to the Radeon R7 M260X, which has GPU core speed of 825 MHz, and 2048 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also features 384 Stream Processors, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R7 M260X should be much faster than the GeForce 820M overall. (explain)

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

Texel Rate

The Radeon R7 M260X should be a lot (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

The Radeon R7 M260X is much (approximately 129%) more effective at FSAA than the GeForce 820M, and will be capable of handling higher screen resolutions more effectively. (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: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.