GeForce GTX 470 vs Radeon HD 6770 1GB

Intro

Compare those specifications to the Radeon HD 6770 1GB, which has a clock speed of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It features 800 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
GeForce GTX 470		215 Watts
	Difference: 107 Watts (99%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 470 is 99% faster than the Radeon HD 6770 1GB overall, because of its greater bandwidth. (explain)

GeForce GTX 470		133920 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 66720 (99%)

Texel Rate

The Radeon HD 6770 1GB will be a small bit (approximately 6%) faster with regards to anisotropic filtering than the GeForce GTX 470. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 2008 (6%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 470 is a better choice, by far. (explain)

GeForce GTX 470		24280 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 9880 (69%)

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 information (measured in MB per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 number of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.