Quote Originally Posted by Hornet331 View Post
4ghz is possible with air on Ci7 with HT off, just look in the Ci7 ocing thread. The only problem are temps with HT on and they depend strongly on voltges.
It make a huge difference if HT is enabled or disabled, disabling HT reduces temps for ~10-15°C

3.8ghz is no problem on air for most Ci7 with HT on and a good aircooler such as a TRUE or a Noctua U12P. Everything above is still possible but temps get in the critical range 90°C+ so WC is recommended or disable HT.
Thanks for the HT tip i had no idea. We are right now on 3.6 Ghz with ULTRA 120 and the temp is stable at low 80's. We had tried to give it a boost at 4ghz and it went BSOD on us.

We did try 3.8ghz for about a week but the temps were really really high and there is always a risk that the summer sun would kill this perfect clock once summer comes around due to rise in Ambiance temp. Now i will try it again with HT off and report back.