GeForce GTX 285 2GB vs Radeon HD 6770 1GB

Intro

Compare those specifications to the Radeon HD 6770 1GB, which comes with GPU clock speed of 900 MHz, and 1024 MB of GDDR5 memory running at 1050 MHz through a 128-bit bus. It also is comprised of 800 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

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

As far as performance goes, the GeForce GTX 285 2GB should theoretically be a lot superior to 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 should be a lot (more or less 44%) more effective 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

The GeForce GTX 285 2GB is a lot (more or less 44%) faster with regards to full screen anti-aliasing than the Radeon HD 6770 1GB, and also should be able to handle higher screen resolutions more effectively. (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 information (measured in megabytes per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high 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 texture units of the card by the core speed of the chip. The better this number, the better the 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 most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.