GeForce 8800 GTX vs Geforce GTX 780

Intro

Compare those specifications to the Geforce GTX 780, which has GPU core speed of 863 MHz, and 3072 MB of GDDR5 memory running at 1502 MHz through a 384-bit bus. It also is comprised of 2304 SPUs, 192 TAUs, and 48 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTX		155 Watts
Geforce GTX 780		250 Watts
	Difference: 95 Watts (61%)

Memory Bandwidth

In theory, the Geforce GTX 780 should perform much faster than the GeForce 8800 GTX in general. (explain)

Geforce GTX 780		288384 MB/sec
GeForce 8800 GTX		86400 MB/sec
	Difference: 201984 (234%)

Texel Rate

The Geforce GTX 780 should be quite a bit (more or less 350%) better at AF than the GeForce 8800 GTX. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce 8800 GTX		36800 Mtexels/sec
	Difference: 128896 (350%)

Pixel Rate

The Geforce GTX 780 should be a lot (about 200%) better at anti-aliasing than the GeForce 8800 GTX, and should be capable of handling higher resolutions without losing too much performance. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce 8800 GTX		13800 Mpixels/sec
	Difference: 27624 (200%)

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 information (measured in MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.