GeForce GTX 460 1GB vs Radeon HD 6770

Intro

Compare all of that to the Radeon HD 6770, which features GPU clock speed of 900 MHz, and 512 MB of GDDR5 RAM running at 1050 MHz through a 128-bit bus. It also is made up of 800 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the GeForce GTX 460 1GB should be much faster than the Radeon HD 6770 in general. (explain)

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

Texel Rate

The GeForce GTX 460 1GB should be just a bit (approximately 5%) more effective at AF than the Radeon HD 6770. (explain)

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

Pixel Rate

The GeForce GTX 460 1GB is much (approximately 50%) better at anti-aliasing than the Radeon HD 6770, and also should be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 460 1GB		21600 Mpixels/sec
Radeon HD 6770		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: Bandwidth is the max amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a 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 figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on 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 potential to get to the max fill rate.