GeForce 930M vs GeForce GT 640 DDR3

Intro

Compare that to the GeForce GT 640 DDR3, which features clock speeds of 900 MHz on the GPU, and 1782 MHz on the 2048 MB of DDR3 memory. It features 384 SPUs as well as 32 Texture Address Units and 16 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 GT 640 DDR3		1560 points
GeForce 930M		1490 points
	Difference: 70 (5%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GT 640 DDR3 should theoretically be quite a bit faster than the GeForce 930M in general. (explain)

GeForce GT 640 DDR3		57024 MB/sec
GeForce 930M		14400 MB/sec
	Difference: 42624 (296%)

Texel Rate

The GeForce GT 640 DDR3 should be a lot (about 29%) more effective at texture filtering than the GeForce 930M. (explain)

GeForce GT 640 DDR3		28800 Mtexels/sec
GeForce 930M		22272 Mtexels/sec
	Difference: 6528 (29%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GT 640 DDR3 is superior to the GeForce 930M, by a large margin. (explain)

GeForce GT 640 DDR3		14400 Mpixels/sec
GeForce 930M		7424 Mpixels/sec
	Difference: 6976 (94%)

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 data (measured in megabytes per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core speed of the card. 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 also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.