Information from ohGrFreak, as i pm'ed him a while back about it.
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
http://downloads.guru3d.com/downloa...2d49e3dcfc0e6aa
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
Click Install
At the Bottom Check Allow enabling hardware masked units
Click customize
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.....
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I haven't tried it, as I don't see the point yet, as my monitor doesn't have a fast enough refresh rate to keep up with what my card could through at it.
sorry but the link doesnt work, but I found:
http://downloads.guru3d.com/download.php?det=163