GeForce 8800 GTX vs GeForce GTX 870M

Intro

Compare that to the GeForce GTX 870M, which features a core clock frequency of 941 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 192-bit bus, and uses a 28 nm design. It is comprised of 1344 SPUs, 112 TAUs, 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 theoretically be 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 should be a lot (approximately 186%) faster with regards to AF 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 (more or less 64%) faster with regards to FSAA than the GeForce 8800 GTX, and will be able to handle higher resolutions better. (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 information (measured in megabytes per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units by the core 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill 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 reach the maximum fill rate.