GeForce 8800 GT 512MB vs Geforce GTX 780

Intro

Compare those specifications to the Geforce GTX 780, which uses a 28 nm design. nVidia has clocked the core speed at 863 MHz. The GDDR5 memory runs at a speed of 1502 MHz on this particular model. It features 2304 SPUs along with 192 TAUs and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB		105 Watts
Geforce GTX 780		250 Watts
	Difference: 145 Watts (138%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 780 should be quite a bit faster than the GeForce 8800 GT 512MB overall. (explain)

Geforce GTX 780		288384 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 230784 (401%)

Texel Rate

The Geforce GTX 780 should be quite a bit (approximately 393%) better at AF than the GeForce 8800 GT 512MB. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce 8800 GT 512MB		33600 Mtexels/sec
	Difference: 132096 (393%)

Pixel Rate

The Geforce GTX 780 will be quite a bit (approximately 332%) faster with regards to full screen anti-aliasing than the GeForce 8800 GT 512MB, and will be capable of handling higher resolutions better. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 31824 (332%)

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 largest amount of data (measured in MB per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

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