Why does my amd athlon 7750 downclock at a certain temp

[torquenstien]

my amd athlon 7750 be is running happily overclocked at 3.2ghz bus speed 200 mhz ht link 1800mhz but when stress testing the temp goes up and when it hits 55*c or above it downclocks it to around 1397ghz til the temp drops to about 49*c which is bugging me slightly can i stop it doing this because i feel 55*c is'nt a high temp and i'm using a coolit eco alc at mo but when i had an artic freezer pro 7 as my cpu cooler it would hit 61 or higher before downclocking just don't understand why its doing this and i'm pretty new to overclocking any help would be gratefully received thanks

 

[akxpckwb]

It's very likely a safety feature to avoid overheat. You can probably disable it on the BIOS

 

[victor94ro]

Have you disabled Cool'n'Quiet in the BIOS?

 

[torquenstien]

yes i have disabled it in the bios i have now changed the cpu to a phenom II 965 and it does exactly the same i cannot see any settings to disable the safety feature but its annoying when stress testing normal use it on gets up to mid 50s and its overclocked to 4ghz