GeForce 840M vs GeForce 930M

Intro

Compare those specs to the GeForce 930M, which has a clock speed of 928 MHz and a DDR3 memory speed of 900 MHz. It also features a 64-bit bus, and makes use of a 28 nm design. It features 384 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce 840M		1600 points
GeForce 930M		1490 points
	Difference: 110 (7%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 840M should in theory perform a bit faster than the GeForce 930M in general. (explain)

GeForce 840M		16000 MB/sec
GeForce 930M		14400 MB/sec
	Difference: 1600 (11%)

Texel Rate

The GeForce 840M should be a little bit (more or less 11%) more effective at texture filtering than the GeForce 930M. (explain)

GeForce 840M		24696 Mtexels/sec
GeForce 930M		22272 Mtexels/sec
	Difference: 2424 (11%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 840M is the winner, though only just barely. (explain)

GeForce 840M		8232 Mpixels/sec
GeForce 930M		7424 Mpixels/sec
	Difference: 808 (11%)

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 information (counted in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units of the card 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.