GeForce 8800 GTX vs GeForce GTX 870M

Intro

Compare those specs to the GeForce GTX 870M, which has a core clock frequency of 941 MHz and a GDDR5 memory frequency of 1000 MHz. It also makes use of a 192-bit bus, and uses a 28 nm design. It is made up of 1344 SPUs, 112 Texture Address Units, and 24 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
GeForce 8800 GTX		155 Watts
	Difference: 45 Watts (41%)

Memory Bandwidth

The GeForce GTX 870M should in theory perform just a bit faster than the GeForce 8800 GTX overall. (explain)

GeForce GTX 870M		96000 MB/sec
GeForce 8800 GTX		86400 MB/sec
	Difference: 9600 (11%)

Texel Rate

The GeForce GTX 870M is a lot (about 186%) better at anisotropic filtering than the GeForce 8800 GTX. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce 8800 GTX		36800 Mtexels/sec
	Difference: 68592 (186%)

Pixel Rate

The GeForce GTX 870M should be much (approximately 64%) more effective at anti-aliasing than the GeForce 8800 GTX, and able to handle higher resolutions while still performing well. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce 8800 GTX		13800 Mpixels/sec
	Difference: 8784 (64%)

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 maximum amount of data (counted in MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.