Hi, can we know if those temps are idle temps or temps after load? 80 degree on load is not something i,d be comfortable with. And afaik throttling starts much before tjmax ,, not too sure bout that tho.
And as for the suggestion for a aftermarket hsf . i think you should go with the Cooler master HYPER 212 PLUS its a newer ver. of hyper 212 and suits ur budget at around 1800 rupees...
You can know the temperatures, because the stressing application tells so, if its putting load or idling the CPU. (Example RealTemp+Prime95)
It is a standard specificiation -- throttling to start at TjMax. What is the definition of 'much before'. If throttling would start 'much' before Tjmax then most Intel CPUs would be throttling more than spinning at the highest frequencies...!
Hyper 212 Plus:
I had the choice to buy this too, but did not go for it. It has a basic design flaw. The copper pipes are made to make direct contact with the CPU. But due to this, there are gaps in the overall surface. So the overall HSF surface is not in contact with the CPU block. Though that area can be filled with TIM.
*img39.imageshack.us/img39/50/closeupsurfaceexplained.jpg
Though apart from this small trivial matter, this is a good HSF for the money.