GeForce 8800 GTX vs Geforce GTX 780

Intro

Compare that to the Geforce GTX 780, which features a GPU core clock speed of 863 MHz, and 3072 MB of GDDR5 RAM set to run at 1502 MHz through a 384-bit bus. It also features 2304 Stream Processors, 192 Texture Address Units, 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

Theoretically speaking, the Geforce GTX 780 should be a lot 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 is a lot (about 350%) faster with regards to texture filtering 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 will be a lot (about 200%) better at full screen anti-aliasing than the GeForce 8800 GTX, and should be capable of handling higher resolutions while still performing well. (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 max amount of information (counted in MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 number of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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