GeForce 840M vs GeForce 930M

Intro

Compare all that to the GeForce 930M, which makes use of a 28 nm design. nVidia has set the core speed at 928 MHz. The DDR3 RAM works at a frequency of 900 MHz on this particular card. It features 384 SPUs along with 24 Texture Address Units and 8 Rasterization Operator 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

Performance-wise, the GeForce 840M should in theory be just a bit better than the GeForce 930M overall. (explain)

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

Texel Rate

The GeForce 840M will be a bit (about 11%) more effective at AF than the GeForce 930M. (explain)

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

Pixel Rate

If using a high resolution is important to you, then the GeForce 840M is the winner, 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: Bandwidth is the maximum amount of information (measured in MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, 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 high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are 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 higher this number, 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 most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.