SO I made the ***** mistake of buying a 2.1 volt 4 gig kit to upgrade my system. Figured 64 bit vista should be running minimum 4 gigs to even bother having it and was sitting at 2 already. However, I forgot my old ram was 1.8 volt, and the system will not boot with both sets of stick in the slots. So, was wondering if their was a resolution for this that gets all 6 gigs online, or if I'm screwed and need to sell the old ram and buy a second 4 gig kit. I can get my system specs if needed, my mobo does allow overclocking is a Gigabyte DS4L but can't find individual slot voltages.