GeForce GTX 285 2GB vs Radeon HD 6770

Intro

Compare all of that to the Radeon HD 6770, which makes use of a 40 nm design. AMD has clocked the core frequency at 900 MHz. The GDDR5 RAM is set to run at a speed of 1050 MHz on this specific card. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 2GB will be 137% faster than the Radeon HD 6770 overall, because of its higher data rate. (explain)

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

Texel Rate

The GeForce GTX 285 2GB will be quite a bit (about 44%) better at AF than the Radeon HD 6770. (explain)

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

Pixel Rate

The GeForce GTX 285 2GB will be a lot (more or less 44%) faster with regards to full screen anti-aliasing than the Radeon HD 6770, and able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 285 2GB		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: Memory bandwidth is the max amount of data (counted in MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 amount of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.