what temp will kill my e6300?

[jaffacakes]

i'm using an acf7pro on my e6300, i've managed to get it down from 55c idle to 45c idle (38 if i take the side off the case) and room temperature is about 10c lol

my question is, how high would be 'dangerously high'?
i'm using Intel Thermal Analysis Tool, she jumps to 57c when i click 'start' with 100% workload, and sits at 47c/47c idle, but in the bios it says 27, is Intel TAT accurate?

 

[jaffacakes]

i'm only overclocked to 2.0G (from 1.8) i've replaced the stock cooler with an arctic freezer 7 pro and scraped off the default thermal gunk and replaced it with AK-450 silver based paste (and loads of it) and i'm not getting the temps i'd like. (she's at 44c right now)

 

[jaffacakes]

twist? there ain't much room for that, the hiper type r II power supply's modular thingy is a beast and most of the sockets press against the cooler, there's hardly any room in my box for maneouvre and it's a full ATX case, i didn't stick LOADS on, two garden pea sized blobs spread out with a skin packet