GeForce 8800 Ultra vs GeForce GTX 870M

Intro

Compare those specs to the GeForce GTX 870M, which has clock speeds of 941 MHz on the GPU, and 1000 MHz on the 3072 MB of GDDR5 RAM. It features 1344 SPUs as well as 112 TAUs and 24 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
GeForce 8800 Ultra		171 Watts
	Difference: 61 Watts (55%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 Ultra is 8% faster than the GeForce GTX 870M overall, due to its higher data rate. (explain)

GeForce 8800 Ultra		103680 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 7680 (8%)

Texel Rate

The GeForce GTX 870M is much (more or less 169%) more effective at anisotropic filtering than the GeForce 8800 Ultra. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce 8800 Ultra		39168 Mtexels/sec
	Difference: 66224 (169%)

Pixel Rate

The GeForce GTX 870M will be much (more or less 54%) better at FSAA than the GeForce 8800 Ultra, and also should be able to handle higher resolutions better. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce 8800 Ultra		14688 Mpixels/sec
	Difference: 7896 (54%)

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 max amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 can be applied in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 chip could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.