GeForce GTX 285 1GB vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which makes use of a 40 nm design. AMD has clocked the core frequency at 900 MHz. The GDDR5 memory runs at a frequency of 1050 MHz on this particular model. It features 800 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 1GB is 137% quicker than the Radeon HD 6770 in general, due to its greater bandwidth. (explain)

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

Texel Rate

The GeForce GTX 285 1GB will be quite a bit (about 44%) more effective at anisotropic filtering than the Radeon HD 6770. (explain)

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

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 285 1GB is superior to the Radeon HD 6770, by a large margin. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
Radeon HD 6770		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 largest amount of data (measured in MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.