GeForce 8800 GT 1GB vs GeForce GTX 870M

Intro

Compare all that to the GeForce GTX 870M, which has core speeds of 941 MHz on the GPU, and 1000 MHz on the 3072 MB of GDDR5 RAM. It features 1344 SPUs along with 112 TAUs and 24 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 1GB		105 Watts
GeForce GTX 870M		110 Watts
	Difference: 5 Watts (5%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 870M should in theory be quite a bit superior to the GeForce 8800 GT 1GB in general. (explain)

GeForce GTX 870M		96000 MB/sec
GeForce 8800 GT 1GB		57600 MB/sec
	Difference: 38400 (67%)

Texel Rate

The GeForce GTX 870M is a lot (approximately 214%) faster with regards to texture filtering than the GeForce 8800 GT 1GB. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce 8800 GT 1GB		33600 Mtexels/sec
	Difference: 71792 (214%)

Pixel Rate

The GeForce GTX 870M is quite a bit (approximately 135%) faster with regards to full screen anti-aliasing than the GeForce 8800 GT 1GB, and will be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce 8800 GT 1GB		9600 Mpixels/sec
	Difference: 12984 (135%)

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 (counted in MB per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video 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 the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.