Beg pardon if I'm being over/under technical. Sound waves are a progression of alternations between pressure and velocity. To absorb sound you need to place something that can convert motion to heat (AKA "friction") where the air molecules are actually moving - so the point in the wave where it's "v...

...a single pass heater core ...much lower resistance to flow For the uninitiated, he's talking about heater cores that have an inlet on the tank on one end and an outlet on the tank on the other end. The flow resistance that's "much lower" is water flow not air flow. With all that said, given that...

can we just modify an existing axial fan but replace the fins with blower style ones? Sure would be nice if it worked that way. The two kinds of fans operate on completely different principles (axial fans are wings and use coanda effect to "scoop" air, cage fans are more centrifugal fans - although...

As far as I can tell, there's only one company that's making any effort to figure out why cage blowers are noisy and to design a quieter one (japanservo) and their products don't seem to be available to the non-OEM market (and they don't seem to sell just the motorized impeller part even to that mar...

...this is because they're suited to different fans. Actually, heater cores aren't suited to axial fans at all, but squirrel cage blowers. Here's a really small blower (really a "motorized impeller") I mounted on a heater core http://koure.org:800/temp/mounted_impeller.jpg BTW, the plastic shroud i...

HammerSandwich wrote:Coolsleeves.

Oh right - hadn't realized they were available in 5/8". Good point!

i think a heatercore's popularity is only based on size and how easy it is to find. And on water-contact material (copper or brass much better as waterblocks tend to be made of copper and, if you can avoid it, it's better to not "mix" copper and aluminum in a system - yes there are anti corrosion a...

Ack! Count the 90 degree turns in that system. At least they're not milled 90s bit still... Oh - and mcmaster has soft silicone tubing that'll probably help reduce vibrations in your current box. You might want to try the thinwall (1/8" wall) which is a lot more likely to kink but will transmit very...

The only reason I can think of to not use a heatercore is if you're planning to use a 120mm fan undervolted to ~5V (or less). Even the thicker axial fans don't generate much pressure - and at very low speed they actually have a problem generating enough pressure to get airflow through a 2" thick cor...

it's remarkable how far those users are willing to go to get a point across, let alone such a biased and unjustified one. Please don't misunderstand - I like procooling a lot . The folks there who don't understand that engineering is a matter of making compromises between goals and that low noise i...

Procooling is a great site - lots of good info. However, a warning - a couple of the posters there are extreme-cooling hobbyists who don't seem to get quiet/silence as an appropriate goal. Please don't let them discourage you as there's lots to be learned there. The gestalt of the site is a bit more...

If you've got your PC under your desk, why bother with a muffler? You can put sound absorptive material on the back wall (and , optionally, on side, top and floor) reduce your noise and essentially not change PC airflow at all. Fan noise tends to be high enough pitched that it's a lot like light bea...

Of course, you could also just hang the thing on a couple of bungee cords. IMHO the easiest way to keep it from swaying around would be a four point mount. Get another pump base (so you now have two). Slide a base onto either side of the pump (same way the current base is slid into "tracks" on the b...

BTW, you could also mount a thick metal plate to the sandwich mounts and mount the pump to the plate - the point being to add to the pumps mass which should reduce vibration (it should move the resonant point to a lower frequency). Probably unnecessary and will add to the shear force on the mounts -...

Erm... use some sandwich mounts like these

BTW, I've recently switched one of my boxes from a 1046 to a HPPS (12V 1046 on sterioids). It's significantly quieter than the 1046 (didn't think that was possible...)

1048 has less flow and head rating than an L20 I think. There's a site in Germany that did actual flow testing (imagine that!) pump spreadsheet at watercoolplanet.de I'f you're not a German speaker/reader (I'm not but have systran) I've put a translated version here: Pump Data I've also deleted pum...

Nobody's mentioned this one - so I will. I just got one of these in a couple of days ago and I put it into a system that had had a Eheim 1046. The 1046's are pretty quiet - just need to be on a block of foam or sorbothane or some such. The HPPS is actually quieter than the 1046, produces more pressu...

Wow... Are those actually 6-sided protrusions glued on (or milled away between)? I totally understand why these are 3X the price of waterblocks designed with an eye to manufacturing costs (surprised they aren't more). EDIT - nevermind the questions - found 'em all answered http://forums.overclockers...

This has gotten interesting - but we're pretty far off from the original topic of How does the ultimate waterblock look like?! I'm wondering if it makes sense to move a lot of this conversation into a new thread. My own personal bias would be to call it something like "Living on the edge of semi-ade...

Thanks for the link, I'll check it out tomorrow (bedtime on this side of the planet - yawn).
20C!! I'm running 32-43 idle-100%load, ambient is 20. I'm not expecting to drop to 12-23
Oh - yeah I'm overclocked, too - Athalon 2600+ XP-mobile at 12.5x203MHz 1.75V.

chylld- hmmm... got a link to where-ever that graph came from? I'm guessing that "Delta T(CPU-wb in)" is the temp above coolant that a CPU might show. I'm also assuming that the coolant temp is unvarying and that it's not actually a CPU, but a CPU-equivalent resistor pack (and how much wattage is be...

For instance, the best waterblock, in terrms of best CPU-to-water heat transfer may not be the best block if you want to use a lower flow/pressure pump. For instance, from this list, I recently selected the Swiftech 5002 http://www.cooltechnica.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=SMC...

These are only car parts in the sense that sometimes there's one in the low-freq speaker box http://www.partsexpress.com/webpage.cfm ... D=143&SO=2

That's assuming you do any of this with the rotor in-situ. They're usually pretty easy to remove (often just a matter of removing a c-clip from a groove in the shaft and lifting). I've since turned off my PC long enough to look at the panaflos I've got installed (this machine is usually on all the t...

The amdmb thread
http://www.amdforums.com/showthread.php ... did=223057
The article that prompted the discussion
http://www.gamingin3d.com/articles/polishfan/
I haven't tried this (fan polishing), but I'm thinking about trying it...

I believe Mark was trying to say something like this: "The proper spelling of the CPU in question is "Athlon" and not "Athalon" Nice theory. I'm certainly glad to have been straightened out on that one - only I know how to spell it - just have been having some prob's typing with a busted finger and...

Mark Larson wrote:Athlon.

kthxbai.

Well, that was pretty cryptic.

I build quiet PCs as a business/hobby (I don't charge nearly enough for it to be a business/business :) - and the "hobby" part is where I get to play with PC gear I can't afford "just to play with". Anyway, the way I've worked it is - person wanting the PC speaks with me - I try to talk them into a ...

EDIT - before you read any farther through this thread, it looks as though the "educated guess" about original chip designations was wrong . See http://www.overclockers.com/tips00333/ . Thanks to Rusty for pointing it out (see below). There are a number of 1700+ and 2100+ athalon thoroughbreds that ...

J.C. Whitney used to sell an acoustical foam for cars that worked pretty good for the "whine-ey" pitch that used to come out of hard disks. The foam was a sandwich of open-celled foam, heavy vinyl, open-celled foam. Of course, the real solution (for me at least) was quieter drives. Anyway, things yo...