GeForce GTX 285 1GB vs Geforce GTX 770

Intro

Compare that to the Geforce GTX 770, which features clock speeds of 1046 MHz on the GPU, and 1753 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 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 1GB		204 Watts
Geforce GTX 770		230 Watts
	Difference: 26 Watts (13%)

Memory Bandwidth

In theory, the Geforce GTX 770 should be a lot faster than the GeForce GTX 285 1GB in general. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GTX 285 1GB		158976 MB/sec
	Difference: 65408 (41%)

Texel Rate

The Geforce GTX 770 will be a lot (approximately 158%) faster with regards to texture filtering than the GeForce GTX 285 1GB. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 82048 (158%)

Pixel Rate

The Geforce GTX 770 will be much (about 61%) faster with regards to anti-aliasing than the GeForce GTX 285 1GB, and also capable of handling higher resolutions without slowing down too much. (explain)

Geforce GTX 770		33472 Mpixels/sec
GeForce GTX 285 1GB		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: Bandwidth is the max amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at 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 can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. 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 many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.