GeForce GTX 285 2GB vs Geforce GTX 780

Intro

Compare those specifications to the Geforce GTX 780, which features core speeds of 863 MHz on the GPU, and 1502 MHz on the 3072 MB of GDDR5 memory. It features 2304 SPUs along with 192 TAUs and 48 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 2GB		204 Watts
Geforce GTX 780		250 Watts
	Difference: 46 Watts (23%)

Memory Bandwidth

The Geforce GTX 780, in theory, should be much faster than the GeForce GTX 285 2GB overall. (explain)

Geforce GTX 780		288384 MB/sec
GeForce GTX 285 2GB		158976 MB/sec
	Difference: 129408 (81%)

Texel Rate

The Geforce GTX 780 will be much (more or less 220%) better at AF than the GeForce GTX 285 2GB. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 113856 (220%)

Pixel Rate

If running with a high screen resolution is important to you, then the Geforce GTX 780 is superior to the GeForce GTX 285 2GB, by far. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 20688 (100%)

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 information (in units of MB per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.