Hi and thanks for the info and i so agree with your comments with the Bios, its the norm, but in Dells defense the ability of changing the running temperatures could have issues with warranty but they do run so cool. With the new fans only outputting 34CFM (which is quite high) the machine only raised 3 deg C with all components being stressed, well safe!!
I love the fan conversion, it was easy, cheap and whisper quite until the lower threshold was reached.
I have to cure this and you are correct it was the Amuschky post that i was quoting, unfortunately i dont really want to load a linux system to change the BMC firmware as i am not very good at these things, i think i will try a freelancer who i can pay to complete the job if i can find anyone, i know there are loads of people out there who want to get their servers quite!!
My other option if you think it will work is unplug all the fans and control them manually with an alarm set on the temperatures just in case something goes wrong but not sure what the BMC will do with no fans connected and no RPM detected.
Also there is software out there called Speedfan , i see there is some custom configurations out there which people have configured for various machines, i had one for my Precision which worked a dream, have you heard of a config for Poweredge??
Do i take it then i can not adjust the fan limits within OMSA? I know you cant adjust the speed of the fans but i thought you can change the thresholds?
Thanks again for your help.
David