CPU voltages on Xeon

[SavellM]

So I have a Xeon X5650 2.66GHz.
I have it running on a Sabertooth x58 mobo.
I have overclocked it up to a nice 4GHz.
200x20 bclk, at 1.325volts core and 1.3qpi, rest is on auto.

I'm doing this as an every day clock as I only use this pc for gaming.

What do you think are safe voltages?
Or what line should I not cross?
Remember this is a server CPU.

Also it's running on a Corsair H80 and idles at 18c.
Prime95 (max heat setting) for 3 hours max 61c.

 

[wazza300]

should be fine,those voltages arnt high you can safely use upto 1.4v for both cpu and qpi/vtt maybe more if temps permit,there still 45nm though arnt they? if so they can take the voltage,try and see if you can lower cpu volatge more or raise oc to 4.2ghz? depends on each chip though oh and aslong as core temps stay below 80c then your fine

 

[SavellM]

It's actually 32nm

I was getting some weird issues at 1.3v flat with the odd bsod or random restarts.

At 1.325v it's all good.

So I can continue to try push the bclk on this voltage and see where I get.
Should I increase qpi voltage at the same time? Or how does that work?