GeForce GTX 285 1GB vs Radeon HD 6770

Intro

Compare that to the Radeon HD 6770, which makes use of a 40 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 memory works at a speed of 1050 MHz on this particular card. It features 800 SPUs as well as 40 TAUs 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

The GeForce GTX 285 1GB should in theory be quite a bit faster than the Radeon HD 6770 in general. (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 (more or less 44%) better at AF than the Radeon HD 6770. (explain)

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

Pixel Rate

The GeForce GTX 285 1GB should be much (more or less 44%) better at FSAA than the Radeon HD 6770, and should be able to handle higher resolutions while still performing well. (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 maximum amount of data (in units of megabytes per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling 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 the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's 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 also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.