GeForce 840M vs GeForce 930M

Intro

Compare all that to the GeForce 930M, which comes with GPU clock speed of 928 MHz, and 2048 MB of DDR3 memory set to run at 900 MHz through a 64-bit bus. It also is comprised of 384 SPUs, 24 TAUs, and 8 ROPs.

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

As far as performance goes, the GeForce 840M should theoretically be a bit superior to 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 bit (more or less 11%) better at anisotropic filtering than the GeForce 930M. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 840M is a better choice, but it probably won't make a huge difference. (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 maximum amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the 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 are processed in one second. This figure is calculated by multiplying the total amount of 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.