GeForce 920M vs GeForce GTX 580

Intro

Compare those specifications to the GeForce GTX 580, which features GPU core speed of 772 MHz, and 1536 MB of GDDR5 RAM running at 1002 MHz through a 384-bit bus. It also features 512 SPUs, 64 TAUs, and 48 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 GTX 580		4956 points
GeForce 920M		1180 points
	Difference: 3776 (320%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 580 should be 1236% quicker than the GeForce 920M in general, due to its higher bandwidth. (explain)

GeForce GTX 580		192384 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 177984 (1236%)

Texel Rate

The GeForce GTX 580 is a lot (more or less 62%) better at anisotropic filtering than the GeForce 920M. (explain)

GeForce GTX 580		49408 Mtexels/sec
GeForce 920M		30528 Mtexels/sec
	Difference: 18880 (62%)

Pixel Rate

The GeForce GTX 580 will be a lot (more or less 386%) better at AA than the GeForce 920M, and also capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 580		37056 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 29424 (386%)

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 (in units of megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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