GeForce 840M vs Radeon R7 M260X

Intro

Compare all of that to the Radeon R7 M260X, which comes with clock speeds of 825 MHz on the GPU, and 1000 MHz on the 2048 MB of GDDR5 memory. It features 384 SPUs as well as 24 TAUs and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R7 M260X will be 300% quicker than the GeForce 840M in general, due to its greater bandwidth. (explain)

Radeon R7 M260X		64000 MB/sec
GeForce 840M		16000 MB/sec
	Difference: 48000 (300%)

Texel Rate

The GeForce 840M is a lot (more or less 25%) faster with regards to anisotropic filtering than the Radeon R7 M260X. (explain)

GeForce 840M		24696 Mtexels/sec
Radeon R7 M260X		19800 Mtexels/sec
	Difference: 4896 (25%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce 840M is the winner, by a large margin. (explain)

GeForce 840M		8232 Mpixels/sec
Radeon R7 M260X		6600 Mpixels/sec
	Difference: 1632 (25%)

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 information (counted in MB per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.