I replace originally supplied Ram (PC10600 2GB DDR3 with thermal monitoring) of HP Proliant ML350G6 Server with Zion 1333MHz DDR 2GB Ram (without thermal monitoring). Due to the difference in thermal monitoring, Server's chasis exhaust fans runs faster and a huge noise is coming out. How to disable thermal monitoring of RAM in HP Proliant ML350G6 server?

Probably in the bios. But I hope you didn't replace ddr3 with ddr that's not possible. Are you sure the 1333 memory is compatible with your PC? You can often check the manufacturers site for your model and there will be a memory compatibility link on the page for your model as well as a specifications list that tells you what speeds of ram you can use with what bios update. There have been many times I have seen that you can only use the faster ram if the bios has been updated to a specific point or higher.

Server is running fine with the replaced RAM, which indicates no compatibility issue. But as new RAM has no thermal monitoring support, server runs its fans more higher speed to cool down the ram. This cause a huge noise of fans. This may cause higher power consumption and may be fatal to server. I want to disable thermal monitoring of RAM from BIOS so that fans can run in its normal speed, but there is no options available (may be I am unable to find the option). Can any one tell which option in BIOS can do it?

I would go to the HP site and look up your model number there. Then using the page for your model look for a manual or FAQ sheet that may help you find the answer. Since every model is sightly different, it would take someone with your same model PC and the same problem to answer your question, and the odds are not good to find that here, your better off in the HP forums and search for thermal monitoring issues there. Sometimes manufacturers of OEM motherboards put a jumper on the board itself to enable or disable the thermal monitoring or other functions because the bios they are using has no way to do it. In that case the jumper would probably be near the memory sticks and labeled as JP2 or something, but without seeing the manual for your specific board and identifying it and its position, you can't just go playing around with jumpers since many are for things that may change the spped of the cpu or voltages and you do not want to mess with that.