Geforce GTX 690 vs Radeon HD 6770

Intro

Compare all of that to the Radeon HD 6770, which features a clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It features 800 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Geforce GTX 690		13111 points
Radeon HD 6770		1520 points
	Difference: 11591 (763%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the Geforce GTX 690 should be 472% quicker than the Radeon HD 6770 in general, because of its greater bandwidth. (explain)

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

Texel Rate

The Geforce GTX 690 will be much (about 551%) faster with regards to AF than the Radeon HD 6770. (explain)

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

Pixel Rate

The Geforce GTX 690 should be much (more or less 307%) faster with regards to anti-aliasing than the Radeon HD 6770, and should be able to handle higher screen resolutions more effectively. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon HD 6770		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 MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units of the card by the core 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.