Recently I'm building an silent i7 rig for PS and double as a HTPC but I found myself in trouble now.
I did some research and put together the following components:
i7 920 (Scythe Big Shuriken cooler)
Asus Rampage II gene
Asus HD4350 silent
3X2G OCZ DDR3 1600
2XOCZ AGILITY 60GB
Lian Li PC-C37B(case fans removed due to no space)
I thought the only thing that will possibly make a sound is the cpu cooler but when I finally finished on it thing doesn't work so well.
When the system is on high load the fan on the Big Shuriken will accelerate to ~1750RPM and emits a horrible wind blowing sound. AND the fanless PSU will have a squeaking noise from time to time.
I tried to set all the voltage in CMOS to a fixed value and like 80% of the squeaking noise from PSU are gone, But the remaining is still very annoying.
I also tried to replace the fan on Big shuriken with a Noctua P12 which turned out to be even louder(maybe because it's closer to the mesh on the top of the case) and even the ULNA resistor didn't help much. And in such a case there aren't many choice for a CPU cooler.
I also looked at water cooling but almost everyone says that passive ones like a Zalman reserator won't be enough for i7, and the pump for active kits or custom built sets won't be silent(like the D5/MCP655 or MCP335), meanwhile it would be really messy course I can by no means fit the whole RAD in an already crowded case and there's no place to mount it outside as well.
Meanwhile it is really really hot under load. After 30 min of prime95, The cpu cores can hit 77C, cpu will be like 67C, Both NB and SB near 78C and the GPU which is actually idling can hit 74C. I don't even dare to put my hand on the left part of the case
So I've no idea what to do with the cooling.
So my question boils down to be:
1. Is the ST45NF supposed to emit a squeaking noise or I just got a lemon? Is there anything other than fix voltage to reduce that?
2. What shall I do about the cooling? Maybe change to a bigger case? Any suggestions on that?
Any suggestions are greatly appreciated.