GeForce GTX 285 2GB vs Radeon HD 6790

Intro

Compare those specifications to the Radeon HD 6790, which comes with core clock speeds of 840 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 800 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 54 Watts (36%)

Memory Bandwidth

In theory, the GeForce GTX 285 2GB should be a small bit faster than the Radeon HD 6790 in general. (explain)

GeForce GTX 285 2GB		158976 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 24576 (18%)

Texel Rate

The GeForce GTX 285 2GB will be much (more or less 54%) faster with regards to AF than the Radeon HD 6790. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 18240 (54%)

Pixel Rate

The GeForce GTX 285 2GB should be much (about 54%) faster with regards to anti-aliasing than the Radeon HD 6790, and also capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 7296 (54%)

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 information (counted in MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.