Thanks for all of the replies ^^, - yeah the time taken is pretty low, I'm doing a 6min video at the moment in Handbrake and its taken roughly 5mins, original was 16.5GB. Although, the one I was using when I hit 99% and 70 degrees was Aftereffects/SVP as I needed to mix some outtakes etc. But thanks for reassuring me that its normal for them to take as much CPU as they possibly can, I think it mainly worries me because I dont think I've had my MB/CPU temp higher than 45, so was worried it may overheat I guess!
Thanks for the help
That fx chip, won't cut off until it hits 85 degrees other than that you should be fine.
If the temp stays above 50 degrees for about 2 weeks or so and climbs up.
I highly advise you look into reapplying new cpu grease or look into a better heatsink fan first.
CPU-Z CPUID - System & hardware benchmark, monitoring, reporting
Keep this incase you dont have it yet, if you wanna monitor it when fully underload that will help you.