I am new here and really hope someone could help me out with this one. My cooler Zalman CNPS9500 is making some weird noises that sounded like the coppers from the heatsink are vibrating at high speed. My temperature level for my e8400 cpu is pretty stable. I have also tried to reorganize my cables just in case they are hitting the heatsink but to no avail. The sound seems to appear under low loadings of the cpu, or at fan speed about 1910 rpm and the noise dissapears at higher rpms. I heard that this is not a bad cooler, and never heard a problem like this from anyone else who's using this cooler. Any help will be very much appreciated.