GeForce GT 130 vs GeForce GTX 850M

Intro

Compare all that to the GeForce GTX 850M, which features a core clock frequency of 876 MHz and a DDR3 memory speed of 1000 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It features 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GT 130		75 Watts
	Difference: 35 Watts (88%)

Memory Bandwidth

Performance-wise, the GeForce GTX 850M should theoretically be a lot better than the GeForce GT 130 in general. (explain)

GeForce GTX 850M		32000 MB/sec
GeForce GT 130		12000 MB/sec
	Difference: 20000 (167%)

Texel Rate

The GeForce GTX 850M should be much (about 192%) more effective at anisotropic filtering than the GeForce GT 130. (explain)

GeForce GTX 850M		35040 Mtexels/sec
GeForce GT 130		12000 Mtexels/sec
	Difference: 23040 (192%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 850M is the winner, by far. (explain)

GeForce GTX 850M		14016 Mpixels/sec
GeForce GT 130		8000 Mpixels/sec
	Difference: 6016 (75%)

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 MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output 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 reach the max fill rate.