GeForce GTX 285 2GB vs Radeon HD 6770 1GB

Intro

Compare all of that to the Radeon HD 6770 1GB, which features a GPU core clock speed of 900 MHz, and 1024 MB of GDDR5 memory set to run at 1050 MHz through a 128-bit bus. It also is made up of 800 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 96 Watts (89%)

Memory Bandwidth

In theory, the GeForce GTX 285 2GB should be quite a bit faster than the Radeon HD 6770 1GB in general. (explain)

GeForce GTX 285 2GB		158976 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 91776 (137%)

Texel Rate

The GeForce GTX 285 2GB is quite a bit (more or less 44%) better at texture filtering than the Radeon HD 6770 1GB. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 15840 (44%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 285 2GB is a better choice, and very much so. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 6336 (44%)

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 data (counted in megabytes per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses 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 high resolutions.

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

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