GeForce 8800 Ultra vs Geforce GTX 780

Intro

Compare that to the Geforce GTX 780, which has a clock speed of 863 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 384-bit bus, and uses a 28 nm design. It features 2304 SPUs, 192 TAUs, and 48 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 Ultra		171 Watts
Geforce GTX 780		250 Watts
	Difference: 79 Watts (46%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 780 should theoretically be quite a bit superior to the GeForce 8800 Ultra overall. (explain)

Geforce GTX 780		288384 MB/sec
GeForce 8800 Ultra		103680 MB/sec
	Difference: 184704 (178%)

Texel Rate

The Geforce GTX 780 is quite a bit (more or less 323%) more effective at anisotropic filtering than the GeForce 8800 Ultra. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce 8800 Ultra		39168 Mtexels/sec
	Difference: 126528 (323%)

Pixel Rate

If using a high resolution is important to you, then the Geforce GTX 780 is the winner, by a large margin. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce 8800 Ultra		14688 Mpixels/sec
	Difference: 26736 (182%)

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 largest amount of data (in units of MB per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units 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 lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.