i am too encountering thermal throttling issues and (relative) low performance with my new 7670,
first test Dell default, after full system update and no tinkering or tweaking
single CB R23 run got a score of 14089, 30 min sustained run scored 13674,
tweaked the system bit and run again
single CB R23 run scored 17019, 30 min sustained run scored 15268,
all along system is thermal throttling through the roof, even at idle temps are at low 80's,
i will see how far undervolting and repasting gets this system alog,
as it is this is simply unacceptable,