I7 920 @ 4.2 safe?

[gumi]

So I was looking for a guide to OC my EVGA x58 and found this

EVGA x58 OC guide.

I'm new to overclocking and somehow 4.2 on air kinda scares me.
I followed the guide almost verbatim except where he did 200 to get 4.2 I did 175 to get about 3.6.
Everything else voltage increases etc I did and it seems stable but I would love any opinions on this.
Last thing I want is to blow a brand new CPU.
I'm running it in a Antec 900 with an extra 120mm fan on the side so its got plenty of airflow but better safe then sorry

 

[RJR]

As long as you keep the tcase temp below 68c and the vcore under 1.38v you should be fine.

 

[foolycooly]

i'm running 3.8 on near stock voltages for what it's worth--1.21250 vcore, 13 hour prime95 stable. I think I ran really good on my processor as I hear a lot of C0's needing much higher vcores. My temps aren't as outstanding as you would think though...idle 39-43 depending on how warm my room is and near 80 under load (with HT on)