I have been promising a few people on the forum a post about silencing my HTPC. So here it is. If you have any questions feel free to ask them. Like wise if you have any tips or improvements let me know! Firstly, I have the excellent Silverstone LC10. I have seen quite a few cases and whilst its not the best, its probably in the top 3 and it is less than half the price of the DIGN and Claritas. Especially if you buy it from where I got mine: http://linitx.com/product_info.php?products_id=610 Dont ask me how these guys sell it for £85 but £35 less than their competitors I didnt ask questions! I wont do a full review of the LC10 here, there are 3 or 4 very good reviews that can be found easily via a google search. In short, it is a well designed and built case that looks very pretty and has a lot of space. It has a few problems but they can be got round with a few simple mods. Firstly, the buddle fans (1x80mm, 2x60mm) are good quality but noisy. They push a lot of air so you can reduce the noise by running them slower with a fan controller or cheaply by soldering a resistor or two inline. I bought new Silenx fans, they are expensive but they move the most air for the least decibles! The first problem is the location of the inlet fan at the front. It sucks air in through the front USB ports, sound jacks and some side vents. Because of this and the cables it has a lot of wind noise exactly where you dont want it at the front. So I cut a new inlet hole in the floor of the case just behind the front foot. The case stands about 20mm off the ground so it takes in a nice supply of clean air very quietly: See the first two attached pictures. I dealt with the other sources of noise in pretty standard ways. The CPU (a Athlon 64 3000) is cooled with a Zalman CPNS 7700 which fits easily in the case and keeps the CPU below 40c at the lowest speed setting even when maxed out encoding a DivX. The Zalman is not silient but it is very quite and the 120mm fan helps cool other components like the northbridge and fanless graphics card. I could go for a fanless solution like the Scythe heatpipe cooler but Im happy with the Zalman and the CPU temperatures. Elsewhere I have used a 450w Silenx PSU. Again it is very quiet but not silent. There are a number of fanless PSUs on the market, but it is new technology and they are quite low on power and reviews say they get quite hot. Next up are the Hard Drives. I have 4 250gb Seagate Barracudas giving me a Terabyte of storage! I have played with the Samsung Spinpoint discs and I still think the Barracudas are quietest It is just a shame they dont have a facility to let you reduce the rpm and hence the noise. The first problem is the storage. The LC10 has 4 internal 3.5 bays but Hard Drive noise is born via vibration, from the spindle down the screws that hold them in the bay into the case and out into the air around.. There are two main ways to reduce Hard Drive noise the first (and most effective) for quiet drives like Barracudas is suspending them. This can be done easily by making a cradle out of elastic bands in a 5.25 bay and suspending the drive in the air. Sadly there is no room for this in the LC10. The next method is the one sold through sites like quite PC that is to enclose the drive. This also has downfalls, firstly it requires a 5.25 bay (a no no in the LC10) and also by enclosing the drive the heat from the drive cannot dissipate properly. I settled on a custom version that uses both these principle and tries to overcome some of the shortcomings. The general idea is to sandwich the drives between aluminium plate. This 4mm plate is thick enough to absorb some of the drive noise, but unlike commercial solution it wicks the heat away from the drives keeping them very cool: See the third attached image. I then enclosed the sides with some furniture foam that I had cut. The overall effect reduced the drive noise significantly but it is still not silent! To fit these enclosures in the LC10, I removed the 3x3.5 bay from the from centre of the case, the main sandwich of 3 drives sits in this space and some of the space to the left of it (orientated at right angles to the DVD RW). To reduce any noise borne to the case, the sandwich is not attached, instead sitting on a foam bed. The last drive sits in a single sandwich in the 5.25 internal bay above the DVD RW. See the fourth attached image. To enclose the drives, the raw materials cost less than £20! Much less than a single enclosure from quiet PC and far more efficient and effective! Finally, the case is insulated with foam. I made a mistake, by buying cheap Speeze foam from e-bay. This makes a difference, but having seen the Acousti foam it oozes quality and is definitely worth the extra £20. The result is a top quality HTPC that is very quiet (although I am now obsessed by noise and never satisfied). The only noise audible from more than a foot away is the hard drives. Personally if the only thing you can hear is hard drives then your PC is pretty damn quiet. It runs cool the case varies between 28c and 35c with a room temperature of 20c. The CPU typically runs at 35c topping out at 40c.