20C between idle and load!

[blackwinterday]

I'm running my Brisbane 3600+ @ 2850Mhz with 1.3v and using Thermaltake Blue Orb II to cool it. Thermal material is nothing special which came with the HSF. Idle CPU temperature is 30C and it jumps to 50C after 4-5 minutes of Orthos test. Even though i tried to reinstall the HSF several times nothing changed. I need some advices about what could be wrong here?

 

[brydon10]

My e6750 OC'ed to 3.4 using a Scythe Ninja Rev. b does the same thing. My idle temps are around 30, load is around 50/52C.

 

[Starholdest]

I had the same problem with the stock cooler. Today I got my Zalman CNPS9700 LED and it's been awesome! I Orthos tested for 2 hours and temps never went budged above 43c.