i run my Barton 2800@2.2ghz and under load only produce 46C with the fan at about 3800rpm oO if i turn it to max i get about 43C out of it but it sounds like ive got a TVR sat under the desk :/
the best system ive built was my old Dual PIII 550 running at 32C under load with 10delta 80mm fans and two stock HS fans

....could only turn them all on to showboat though due to noise polution :/