unlocking the pipelines would give you 16 pipelines, like the 6800gt does.
Shouldn't be any more dangerous than overclocking. I found out about it from Ohgrfreak in a pm (I realise the link doesn't work, but you can get newer versions from that site)
How to unlock those extra pipes to get the Ultra's 16. First of all, if you get artifacts or any obvious mess', there is a "set to default" setting on the following program you can simply click. Now, this is not my original work, I forget who sent it to me, but here it is:
first u need rivatuner 15.2 which can be downloaded here
scroll down and click "I Agree"
the download should start
after its finished, install it
once it is installed, click Start, Programs, Rivatuner, Rivatuner
under Target Adapter click Customize, then click on the Graphic Card
Click NVStrap Driver
At the Bottom Check Allow enabling hardware masked units
Then Checkmark the 2 Bit xx that say disabled
ok.....ur done...restart windows and run a 3D intense program........if it has a lot of artifacts......it didnt work and u have to change back.....
I would make sure you have a good psu first though.