GeForce 8800 GTX vs Geforce GTX 780

Intro

Compare that to the Geforce GTX 780, which comes with 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 is made up of 2304 SPUs, 192 TAUs, and 48 Raster Operation Units.

Display Graphs

Hide Graphs

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, the Geforce GTX 780 should be a lot faster than the GeForce 8800 GTX overall. (explain)

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

Texel Rate

The Geforce GTX 780 will be much (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 should be a lot (approximately 200%) faster with regards to full screen anti-aliasing than the GeForce 8800 GTX, and capable of handling higher screen 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: Bandwidth is the maximum amount of information (counted in MB per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. 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 high resolutions.

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

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