@elheriel: Honestly, your CPU temperature at full load is normal, consider that fact that you are using a stock heat sink for cooling. Modern intel CPUs are designed to work fully loaded up to 90c. If your CPU temp is reaching anything near or beyond that, then your CPU might have an overheating issue and need to find out what's causing it.
This is the offical answer by intel themselves:
http://communities.intel.com/message/190511
Certainly, you don't want to stress your CPU to that limit at all time, hence this will for sure shorten the life span of your CPU.
But even with that, the shorten life span of a CPU may still out live the time you need to get a new system entirely, as PCs components get obsolete really fast anyway?
People like to install after market cooling system to keep things chill at low 30c is nice but not really entirely necessary if you are not overclocking your CPU. The only thing you need to do is, to monitor the CPU temp. periodically and change the thermal compounds undernear the stock heat sink when it dries up when it starts losing its effectiveness (normally will last for 5 years, depending on usage)
In fact, even people with after market heatsink install need to do this too.
Another thing you need to consider is the way we are going to use and tweak our PCs also dictate whether your CPU (and other components in that regard) will last long enough til the entire system is obsolete. In your case, you mentioned you have not done any overclocking and are using your computer for gamming; in a few years (maybe 4-5 years), most probably you won't be able to play most of the demanding game at that time anyway and it will be time for a new PC entirely. Even running at 70c, for sure your CPU will last that 5 years down the road. So, I don't really see there is a immediate concern for the temp. and life span of your CPU here.