These are my temps measured with CPU-i



In Leo I would idle in low 30's. Speedstep seems to be working but Voltage stays at max.

Idling @ 75° is not healthy at al and should be taking care of ASAP. A big jump like that makes me think it's more hardware related. You haven't changed anything since installing SL?

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 Snow Leopard 10.6.7  Gigabyte GA-P35-DS3P  Intel Q6600 @ 3Ghz  Corsair CM2X2048-6400DHX  Gigabyte HD5770 Silent Cell  Samsung SyncMaster 2494SW  ALC889a  Creative T5400 5.1  Maxtor 380215AS  Pioneer DVR-215D  Presonus Inspire 1394  KRK Rokit 5  Wacom Bamboo One 
 SL USB Guide => http://www.infinitemac.com/f57/guide...k-drive-t3705/ 