GeForce GTX 460 2GB vs Radeon HD 6770 1GB

Intro

Compare that to the Radeon HD 6770 1GB, which uses a 40 nm design. AMD has set the core speed at 900 MHz. The GDDR5 RAM runs at a frequency of 1050 MHz on this card. It features 800 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
GeForce GTX 460 2GB		160 Watts
	Difference: 52 Watts (48%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 460 2GB should in theory be quite a bit better than the Radeon HD 6770 1GB overall. (explain)

GeForce GTX 460 2GB		115200 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 48000 (71%)

Texel Rate

The GeForce GTX 460 2GB will be just a bit (approximately 5%) faster with regards to AF than the Radeon HD 6770 1GB. (explain)

GeForce GTX 460 2GB		37800 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 1800 (5%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 460 2GB is a better choice, by far. (explain)

GeForce GTX 460 2GB		21600 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 7200 (50%)

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 largest amount of information (measured in MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many 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.