GeForce 8800 GT 256MB vs Geforce GTX 780

Intro

Compare those specifications to the Geforce GTX 780, which features a core clock frequency of 863 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 384-bit memory 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 GT 256MB		105 Watts
Geforce GTX 780		250 Watts
	Difference: 145 Watts (138%)

Memory Bandwidth

In theory, the Geforce GTX 780 should be quite a bit faster than the GeForce 8800 GT 256MB overall. (explain)

Geforce GTX 780		288384 MB/sec
GeForce 8800 GT 256MB		44800 MB/sec
	Difference: 243584 (544%)

Texel Rate

The Geforce GTX 780 should be a lot (more or less 393%) faster with regards to anisotropic filtering than the GeForce 8800 GT 256MB. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce 8800 GT 256MB		33600 Mtexels/sec
	Difference: 132096 (393%)

Pixel Rate

The Geforce GTX 780 will be much (more or less 332%) more effective at anti-aliasing than the GeForce 8800 GT 256MB, and should be able to handle higher screen resolutions more effectively. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce 8800 GT 256MB		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 maximum amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, 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 maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant 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 maximum fill rate.