I've used many 1366 CPUs including X model Xeons. (!)
Overclocking is a lottery, plain and simple.
Case in point - I have two W3520s that overclocked and beat out three i7 975s by quite a bit! I had W3540s that were DOGS!
The guy posting his air o/c (more than likely) is "benchmark stable". I just don't see that speed and voltage working on commercially available air cooling. Unless he lives in the arctic region with the box outside. Or maybe he's a butcher and the workplace allows his pc in the walk-in?!
That voltage and frequency when fully stressed with a program such as Linpack is going to generate crazy heat. High end air won't work. Water cooling will if a large radiator is used. Even then I would expect mid 70s temperatures.
I'm BCLK limited with this chip because of the memory configuration - I use 12GB at 7-7-7-18-1T 1693 / 1066 strap. This is on a 4X Classified X58 (762) Mobo. Cooling is achieved with a Venomous-X with a pair of Gentle Typhoon 1800RPM fans in push pull. Idle temps around 35C, load temps in the lower 60s - peak load temps lower 80s.
My definition of stability and endurance are different than most people's. If the box cannot pass the harshest loading test while getting thrown on the floor while at sea along with two gorillas playing volleyball with the case - then it's of no use to me! Ok that may be slightly exaggerated. I will say those Gentle Typhoon fans are quite durable and really can take a beating without dying!