To unlock the pipelines you need to download this: http://www.guru3d.com/rivatuner/
When the download's 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 and then click install. At the Bottom Check Allow enabling hardware masked units. Click customize, then Checkmark the 2 Bit xx that say disabled. OK.....your 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.... But no harm in trying.
You will just get artifacts if it failed to unlock. In the very unlikley event of it, there is always a RMA.