Geforce GTX 690 vs Radeon HD 6770 1GB

Intro

Compare those specifications to the Radeon HD 6770 1GB, which comes with core speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
Geforce GTX 690		300 Watts
	Difference: 192 Watts (178%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 690 will be 472% faster than the Radeon HD 6770 1GB overall, due to its higher data rate. (explain)

Geforce GTX 690		384512 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 317312 (472%)

Texel Rate

The Geforce GTX 690 is a lot (more or less 551%) more effective at AF than the Radeon HD 6770 1GB. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 198240 (551%)

Pixel Rate

If running with a high resolution is important to you, then the Geforce GTX 690 is superior to the Radeon HD 6770 1GB, by far. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 44160 (307%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the 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 higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure 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 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 maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of 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.