Below are some snippets of information that I suspect will become frequently asked questions, and will be updated regularly:
Sandy Bridge has only been around for a short time, but sadly, there is an incredible amount of confusion regarding certain aspects of voltage adjustment. The information below, comes directly from Asus, Gigabyte, Corsair and Intel PMO (Platform Memory Operations), and to the best of my knowledge is 100% correct at the time of writing this. Of course, if any new information comes to light, I will update this section.
Sandy Bridge does not demand only 1.5v modules, it will be perfectly happy with 1.65v modules too. If someone tries to tell you that you must have 1.5v modules, then they are either trying to sell them to you, or they have been reading misinformation, or both! Another point to consider here, is that in your BIOS, if you head to the memory voltage setting, and enter 1.5v, the text will remain white/grey, if you enter 1.65v, it will turn yellow, and it isn't until 1.73v that it turns red, so at the moment, I'd rest assured that 1.65v modules are OK to use, and I have had this confirmed by Asus, Gigabyte and Corsair so far, as soon as I hear from anyone else, I will update this again.
Sandy Bridge does not require there to be a maximum of 0.5v between the VDIMM value and the VCCIO and VCCSA values when 1.65v voltage modules are used.
BCLK Overclocking will not murder your CPU or motherboard. There is absolutely no evidence to support the rumours that adjusting the BCLK upwards on a locked or unlocked CPU will kill/damage it. What will happen, is that the system will become unstable, and you will lose control of things like your hard drive or graphics card, resulting in instability, corruption or the inability to start up properly. As with any overclocking induced instability, simply reduce the overclock and you will find that normality resumes - If you have suffered a SATA problem, then you may have to run your Windows repair console to get the boot loader back.