GeForce GTX 580 vs GeForce GTX 850M

Intro

Compare those specifications to the GeForce GTX 850M, which has GPU clock speed of 876 MHz, and 2048 MB of DDR3 RAM running at 1000 MHz through a 128-bit bus. It also features 640 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

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 GTX 850M		3340 points
	Difference: 1616 (48%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GTX 580		244 Watts
	Difference: 204 Watts (510%)

Memory Bandwidth

In theory, the GeForce GTX 580 should be 501% quicker than the GeForce GTX 850M overall, because of its greater data rate. (explain)

GeForce GTX 580		192384 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 160384 (501%)

Texel Rate

The GeForce GTX 580 will be much (more or less 41%) more effective at texture filtering than the GeForce GTX 850M. (explain)

GeForce GTX 580		49408 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 14368 (41%)

Pixel Rate

The GeForce GTX 580 will be a lot (more or less 164%) better at anti-aliasing than the GeForce GTX 850M, and able to handle higher resolutions better. (explain)

GeForce GTX 580		37056 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 23040 (164%)

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. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 processed per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling 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 the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.