Well I’ve had my G1 for a couple of months now, great card but I don’t think I’m able to get the best out of it yet.
On Afterburner I have it set up for +60v, %120 power, clock with +128 and mem +325, Which boosts to 1533mhz. On the same power and voltage settings I can get it up to +150mhz and +495 on the memory but some games, Arma3 mainly, doesn’t like it.
Current issue is I have the fans running at 70-75% to keep the card between 70 – 74c. Fan speed goes any higher and the sound becomes seriously obnoxious, lower and I start hitting too many thermal ‘walls’ and lose my OC anyway.
New case this weekend so we'll see if I'll have either the thermal room to push it a bit harder or at least get fans below 50% (where they are inaudible)