Xeon 3050 Temps

I got this Xeon 3050 (basically an E6400) and I am just messing around with it some to see what it will do.
Right now I am at 3.4ghz with vcore @1.375
Temps are 38-40 idle and 58-60 dual prime load after 6 hours.
I'm using a Scythe Ninja on it.

My questions are....how much vcore is safe and what max load temps would you be comfortable with?

Thanks...

I always go with the max allowed within the warrantee to start things off. It should say on your box.

Actually this was a crazy deal I got on ebay....processor only for under a c note.
I am just running it at stock vcore at 3.2ghz...Superpi was 17.6xx so I am happy seeing as how this rig was originally just going to have a e2140 in it.