For the test purposes, can you ran R-Drive Image with almost no compression for the images? The only task R-Drive Image uses full CPU power for is compression.
Processor's temp is cooler with less compression, that's true.
But since I use DI (2 years), I always use the higher comp to gain room on my external HDD, and never I have seen such temperature with former versions !
My comp was beeping without end, and I had to stop imaging !