GeForce GTX 285 2GB vs Radeon HD 6770 1GB

Intro

Compare all that to the Radeon HD 6770 1GB, which has clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 800 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

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 137% faster than the Radeon HD 6770 1GB overall, because of its higher bandwidth. (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 should be quite a bit (more or less 44%) more effective at AF 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 resolution is important to you, then the GeForce GTX 285 2GB is superior to the Radeon HD 6770 1GB, by a large margin. (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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units by the core 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 per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in a 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 drawing the pixels (image) on the screen. The actual pixel rate also depends on many 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.