GeForce 840M vs Radeon R7 M260X

Intro

Compare those specifications to the Radeon R7 M260X, which uses a 28 nm design. AMD has set the core speed at 825 MHz. The GDDR5 memory runs at a frequency of 1000 MHz on this particular card. It features 384 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R7 M260X should in theory perform quite a bit faster than the GeForce 840M in general. (explain)

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

Texel Rate

The GeForce 840M is much (approximately 25%) better at anisotropic filtering than the Radeon R7 M260X. (explain)

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

Pixel Rate

The GeForce 840M should be a lot (approximately 25%) faster with regards to FSAA than the Radeon R7 M260X, and capable of handling higher screen resolutions without losing too much performance. (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 (measured in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.