First would like to thank everyone for the help on my HTPC.
I posted back in May on the System Advice forum a proposed parts list for a HTPC based upon my research.
You all almost completely changed my proposed list (I only kept the case and memory), based upon solid reasoning.
I finally ended up with:
Case - Silverstone LaScala LC-20M
MB - Asus M2NPV-VM -- mATX / AM2 / nForce 6150 + nForce 430
CPU - AMD Athlon 64 3500+ Lima 2.4GHz 512KB L2 Cache Socket AM2 Processor ADD3500CNBOX
Western Digital Scorpio WD1200BEVS 120GB
2 gigabytes DDR2 Memory
CPU cooler - Thermalright ultra 90A
PSU Seasonic S12 430Watt
Generic DVD CD Player
Case Fans â€“ 2 x PCExtreme 250mm 12 VDC Fan
Gyration Cordless Keyboard
Gyration Cordless Air Mouse
The project must be described as a complete success, fan noise â€“ gone!, disk noise â€“ Gone!
The Full Rig is Shown Below.
The 80 inch HDTV is a rear projection CRT, a veteran purchased in 2001. Still works well, Windows Media player is on.
The next pictures show the 250mm fans as they are implemented on the cabinet.
Why and how can I use such big fans? I have a large 1500 watt HT Receiver (Yamaha RX-Z9) in the equipment cabinet and this unit must be ventilated. This is the main source of cabinet heat, its power supply is a huge analog unit thatâ€™s not very efficient. This cabinet was purchased when I purchased the HDTV. This cabinet is part of a large decorative piece of mahogany furniture that surrounds the TV. My wife informed me that equipment out in the open, spread around the room was not possible so the cabinet is non-negotiable. So the problems are, the decorative cabinet must be used and the cabinet must be ventilated even without the HTPC. It seems that using the cabinet fans to also ventilate the HTPC is an efficient solution and likely much quieter.
This picture shows the parts of the ventilation system for the cabinet.
I put the big fans in the back of the equipment cabinet and baffled the cabinet to force the air flow, facilitating the cooling of the HT Receiver, other equipment and the HTPC with these big fans. The fans mount in a plenum on the rear cabinet cover. The rear of the HTPC is butted up to the front of the plenum and sealed with weather stripping.
This picture shows the HTPC butted up to the plenum as it will be in the cabinet.
The PC has all of the expansion slot covers and both 80mm case fans removed to open up the rear of the HTPC reducing air flow restriction. The PSU has a fan and its air flow comes in from the side of the case and out the back, so itâ€™s not in conflict with the big 250mm fans, though as far as I can determine this fan never comes on when playing music. The PC uses fairly low power (thanks in large part to this forumâ€™s recommendations) so presumably the power supply is idling mostly. The air flows in from the bottom of the cabinet over the top of the receiver, then up over the other equipment and then finally through the HTPC and then vents out through the fans.
With the glass equipment cabinet front door closed there is literally no sound from the rig. If you put your ear in back of the cabinet you can just hear the fans and very faintly an occasional click from the hard drive emanating from the fans. This is with the furnace, refrigerators and clocks off and no sound playing from the system.
Iâ€™ve posted a more detailed description of the ventilation system in the Fans and Control forum (Two 250mm Fans Cool HTPC and Entire Home Theater). I took fairly extensive air flow and temperature measurements to make sure the fans were doing the job.