Got new coolers for the computer yesterday and spent few hours tuning the case (replaced the front fan to a bigger one and relocated the hard disks). The hard disk frame is done from a piece of aluminum plate and the front fan is running at 7 volts.

The Accelero is passive at the moment because it keeps the 8600 quite cool. Idle temperature is staying at about 37°C and after an hour of CoD4 with high settings it didn't get over 46°C. CPU is idling at about 32°C and stressed with superpi it doesn't seem to get over 40°C. I'm quite pleased that the components are staying cool and the computer is now very silent. :)

Also check out the timelapse video that I made about the install of the Accelero for the 8600GTS. I made it just for fun and wanted to try out the intervalometer function in my camera:
http://www.youtube.com/watch?v=zaGrRnd-d2I

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My rather low budget machine:

CPU: Intel Dual Core E2140
Mobo: ASUS P5GC-VM
RAM: 2 * Kingston 1GB 667MHz DDR2
HDD1: Seagate Barracuda 7200.10 320GB SATA2
HDD2: Western Digital Caviar WD3200JB 320GB IDE
GPU: Foxconn GeForce 8600 GTS 256MB
PSU: Nexus 350W

CPU cooler: Sharkoon Silent Eagle CPU cooler
GPU cooler: Arctic Cooling Accelero Rev.2

The case is just a normal ATX case I got for free. It is just a temporary case until I get the time, money and materials for a custom case that has been in my mind for a long time now.

[Edit 06-03-2008] 3DMark03 scores: 17111 marks (10k marks more than my previous setup)
[Edit 08-03-2008] 3DMark06 scores: 5300 3Dmarks | SM 2.0: 2400 | SM 3.0: 2260 | CPU: 1402