GeForce 8800 GT 1GB vs GeForce GTX 850M

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce 8800 GT 1GB		105 Watts
	Difference: 65 Watts (163%)

Memory Bandwidth

The GeForce 8800 GT 1GB should in theory be a lot faster than the GeForce GTX 850M overall. (explain)

GeForce 8800 GT 1GB		57600 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 25600 (80%)

Texel Rate

The GeForce GTX 850M is a bit (approximately 4%) more effective at texture filtering than the GeForce 8800 GT 1GB. (explain)

GeForce GTX 850M		35040 Mtexels/sec
GeForce 8800 GT 1GB		33600 Mtexels/sec
	Difference: 1440 (4%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 850M is the winner, and very much so. (explain)

GeForce GTX 850M		14016 Mpixels/sec
GeForce 8800 GT 1GB		9600 Mpixels/sec
	Difference: 4416 (46%)

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 (in units of MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the 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 amount of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated 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 rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.