First of all, sorry for my english I'm french.
A buzzing electrical noise (not a fan noise) was comming from my power supply.(new PC : I7 920, DDR3, HD4870, Gigabyte X58-UD5,.. Corsair TX650).
I've made some test with another new power supply(not a corsair one) and the noise was still there .. so I've started to search why...
It seems that the problem was comming from the 'powersaving' systems use by Intel processors. Something seems to be wrong when they are activated in the bios ( a kind of incompatibility between MB-CPU-Graphic-Power working together).
Before the RMA procedure I suggest you to try to set the 2 parameters :
C1E and EIST (Enhanced Intel Speedstep Technology) to disable in the MB BIOS.
It seems this solution is working fine specially for new PC (Core 2 duo or better).
Hope it will help some of people reporting buzzing noise to avoid unnecessary RMA.
My TX650 works fine and I'm happy of it.
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