I'm happy enough with my computer as it is, it works great. However, I have a friend who insists that I should put the 1.5v "Sniper" 8GB into MY computer, and use the 1.7v "Viper" 4GB into my daughter's build ... he's concentrating on the GBs, not the voltage of the RAM.
The more I read about Sandy Bridge architecture, it seems that putting 1.7v RAM along with it isn't the smartest thing to do. I don't want to worry about small stuff, but this computer "stuff" can get intricate ...
Should I just leave it alone and use the "Sniper" 8GB in her build, as I originally planned? Or do what my computer friend says? Or, put the "Sniper" 8GB in MY computer, SELL the 1.7v "Viper" RAM (at a loss, obviously, because RAM is so damn cheap now) and get another set of 1.5v memory for daughter's build?
1.65v is the max you can run on Sandy Bridge chipsets, Intel recommends 1.35v to 1.5v.
Even if you got it to work by lowering the voltage, speed and timings it makes it not worth it, I would consider giving your daughter your entire PC and keep the Sandy Bridge!