GeForce GTX 470 vs Radeon HD 6770 1GB

Intro

Compare those specifications to the Radeon HD 6770 1GB, which comes with a core clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also makes use of a 128-bit bus, and uses 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

The GeForce GTX 470 should theoretically perform quite a bit faster than the Radeon HD 6770 1GB overall. (explain)

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

Texel Rate

The Radeon HD 6770 1GB is just a bit (about 6%) more effective at 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

The GeForce GTX 470 is quite a bit (about 69%) more effective at anti-aliasing than the Radeon HD 6770 1GB, and will be capable of handling higher screen resolutions more effectively. (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 max amount of information (measured in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core 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.