Windows 7: Overclocking Kingston HyperX ram on Asus P5N32 SLI SE

Hello to all, this old mother-er-board is running Windows 7 just great. When I first built this thing I used Windows XP and there was, included with the motherboard an overclocking utility that enabled one to safely overclock the ram. It will not, however, work with Windows 7. No surprise to me, but I was wondering if there is anyone out there that could tell me how to safely overclock the memory thru the BIOS? I can overclock the cpu fairly easily but have no idea how to overclock the ram safely. I have 8G of Kingston HyperX 6400 (800). I am getting a score of 6.8 in the performance test and it shows the memory is the weakest link.

I have no intention of building a new system as long as this old beast does the job. Just like to play around with it and see how high she'll fly. If it ain't broke try to fix it anyway!

Thanks in advance, Frank