GeForce 820M vs GeForce 930M

Intro

Compare those specs to the GeForce 930M, which has clock speeds of 928 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 RAM. It features 384 SPUs as well as 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 930M		1490 points
GeForce 820M		850 points
	Difference: 640 (75%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce 820M should theoretically be a bit superior to the GeForce 930M in general. (explain)

GeForce 820M		16000 MB/sec
GeForce 930M		14400 MB/sec
	Difference: 1600 (11%)

Texel Rate

The GeForce 930M will be quite a bit (about 94%) better at texture filtering than the GeForce 820M. (explain)

GeForce 930M		22272 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 10768 (94%)

Pixel Rate

The GeForce 930M is much (approximately 158%) more effective at full screen anti-aliasing than the GeForce 820M, and will be capable of handling higher resolutions without losing too much performance. (explain)

GeForce 930M		7424 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 4548 (158%)

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 data (counted in megabytes per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at 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 the video card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.