can the 3930k takes up more than 1.5v? and how high can the temp 3930k handle?

wats ur temp when u oc it at 1.5v??...waiting for new budget for wc then..hehehe

A very early pre-beta prime95 version 27.1 is available. It has support for most, but not all AVX FFT lengths. I have not done any of the 64-bit optimizations.

I've been using this version on my Sandy Bridge for the last few days without incident. You are free to do so too. I'm fairly confident it will produce valid results as it has passed some torture testing and QA runs. If you do not have a Sandy Bridge CPU (or maybe a Bulldozer) there is absolutely no reason to download this version. In fact it would be dangerous to do so as I have not tested the SSE2 or x87 FFTs to see if I've broken something!

to achieve that 5ghz...is it necessary to wc the mobo too?..or the cpu only should sufficient?

3960x need more voltage to reach 5ghz compare to 3930k

From memoryc bro... but now this model not available anywhere across the globe already.
your best bet is the 2133C9 kit or wait for the 2400C8 (not sure availability though)

Now i need to add one more PSU for the extra PCIE connector on the mobo. One AX1200 is not enough 

No stock on the 2400, the next piece already back ordered by a customer. Wait time may be over a few months for the 2400. I recommended this to bro Norazam:
http://www.gskill.com/products.php?index=450&c1=1&c2=3

with ready stock but I think he wants the other 2400 CL9

Since the CL8 kit already booked by you there is nothing else available besides the above ram.

<1.5V to hit 5ghz looks really sweet. Most of my customer's 2500/2600k needs 1.5V to hit close to 5ghz.