Ok ok, I just said 0db to bait you! But at last I've finished a rig I'm happy with and which I can't hear unless I really concentrate. First up thanks to all of you who have helped. I've had a few questions about drives, sinks and PSUs and without silentpcreview it wouldn't have happened.
I use my machine in my home studio, so I don't want to be able to hear anything when recording. With this set up I can switch the case fans off by just unplugging the fancontroller mounted at the front. But since I put the mCubed psu in everything is so much cooler that I don't need them until the machine has been on for a couple of hours. The set up is barely audible. There's some seek noise from the drives and a low hum from the PSU, [edit - correction, the hum was from something else in my rack that I couldn't hear before when I had the stock Fusion PSU. The mCubed is inaudible and I'm really happy with it] but to put those in context they can't be heard over one Noctua fan at 5v. It all lives in a box with a door and when that's shut there's nothing to hear.
I tried my own HDD sandwich which was great except for seek noise. http://www.silentpcreview.com/forums/vi ... hp?t=41854
The Scythe quiet drives are better. I also found the nvidia GF7600GF runs pretty hot - at an idle of about 80C. So I just stuck a big heatsink on top of the stock sink with some transfer tape and it runs about 15C cooler. There's pics below with/without the sink.
So here's some pics:
The components are:
MOBO: Gigabyte GA-8i945GMMFY-RH
CPU: Core Duo T2400 1.83 GHz
Heatsink: Scyth mini ninja
Ram: 2x DDRII 1G
Drives: 2x Hitachi notebook 5400rpm HTS541616J9S
Drive enclosures: Scyth quiet drive 2
Graphics: Nvidia GF7600GS - 256mb
Fans: 2x Noctua NF-S12 800rpm
PSU: mCubed EF28 external 200w
DVD burner: Pioneer DVR 111 DB4
For any interested musos, this system is running protools LE v7. Most of my stuff is outboard so I'm only running 3 or 4 plugs mostly. It copes recording 16 tracks from my tape machine and I don't think I'll ever need more than that at home.
My first newbie post was about water cooling because I thought that might be the way to silence the purpose built "music computer" I bought. Luckily your advice was "water won't shut that up" and I sent it back! So thanks heaps everybody for saving me the time and effort of fiddling with that!