I have an Asus P5B Deluxe with an E6600. I'm running 333X9 with C1 disabled, Vcore at 1.2V, PCIExpress 100Mhz, PC6400 underclocked to 533. The CPU on speed fan is 67C and each core is listed at 64C.
I just took off the fan and applied some thermal grease. The fan is a Zalman 92mm Fatal1ty...