GeForce GTX 285 2GB vs Geforce GTX 770

Intro

Compare those specifications to the Geforce GTX 770, which has core speeds of 1046 MHz on the GPU, and 1753 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 2GB		204 Watts
Geforce GTX 770		230 Watts
	Difference: 26 Watts (13%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 770 should theoretically be a lot better than the GeForce GTX 285 2GB in general. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GTX 285 2GB		158976 MB/sec
	Difference: 65408 (41%)

Texel Rate

The Geforce GTX 770 will be quite a bit (approximately 158%) better at AF than the GeForce GTX 285 2GB. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 82048 (158%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Geforce GTX 770 is superior to the GeForce GTX 285 2GB, by far. (explain)

Geforce GTX 770		33472 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 12736 (61%)

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 max amount of data (in units of MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 can be applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.