Taken from the link you provided.
I think all the Sandys start throttling at 95C. Most people try to keep temps below 80C I think though
That guy doesn't have a clue as to what he is talking about, multiplier throttling will happen way before then as long as you have Thermal Throttling enabled, and you definitely need to keep that enabled in your overclock to protect your CPU.
If you can keep it cool enough you can do what you want, if not, it's going to throttle down but unless you have CPU-Z active so you can monitor whats going on, you won't have a clue it's even throttling back.
I would say for your CPUs longevity stay below 72c with any load testing, if you're not satisfied with where your overclock is at, get a better cooling solution, don't risk damaging your CPU, the trade off is heat/voltage, it takes more voltage to run the higher clocks, more voltage = more heat.
More heat with more voltage = faster degradation of the CPUs electrical pathways and that's bad!
Your Thermaltake Frio is giving you a great 4500mhz 24/7 stable overclock your vcore at 1.32 is the same as mine, and that's a safe range you're in clock/load temperature wise.
There's no gaming performance past 4500mhz anyway, I've tested it on my 2500K to 5100mhz but I have a cooling solution that will allow those clocks, you'll see benchmark increases for bragging rights and some increased frames per second conversions in Video encoding.
What I'm saying is you are in a great place right now and I understand the desire to push it further, but the cooling it will take you to get there is not even a standard water cooling loop, you'll need solid below ambient cooling to reach the higher multipliers and be rock solid.
When you get a chance check
this out. Ryan