Yeah that's quite normal for a SB under those circumstances.
I'm seeing temps of 80 to 90 C when I download Windows Updates. The CPU is pegged at 80 to 100% during this time.
But it still seems to work. I have been updating my copy of Windows 7 with SP1 and other updates from a couple of hours, and the temps don't seem to cause the HTPC to stop working.
But it is definitely over the 69.1 temp, unless HWMonitor isn't working right.
I have the Intel stock cooler.
EDIT: I upgraded the BIOS to F5, but no change in temp readings. Using three temp monitors now and they are reporting similar values. What is the TJ max for the G530? According to RealTemp, it is 102C? I moved it back down to my office and it idles now at 50C, so maybe it is an airflow question, but still, that is very high to me for idle. I also put some Artic Silver paste on the fan when I installed the stock cooler. Would that matter?