CPU fan recommendations for dual 800 Quicksilver

Question

It never rains but it pours.
Just a few hours after posting about HD heat issues my CPU fan has gotten really noisy with a slight rattling noise. Yes, it is the CPU fan. Maybe it's the hot weather we are having causing something to expand, or maybe the cleaning I gave it yesterday with compressed air pushed it over the edge. Anyway, I removed the fan, lubricated it with one drop 3M oil under the sticker, replaced it. All dust and dirt is off the blades. I have poked and prodded it to see if there were other items vibrating (e.g., the famous screws touching something), but nothing changes. The sporadic rattling (sometimes disappears for half a minute or so but usually there) really suggests to me that a bearing might be going. At this stage I think it is time to go shopping for a new fan.
This is a dual processor machine of the early QS series so it's like a toaster inside and I'm not sure if any of the standard QS fan recommendations apply to a dual. Of course I want everything - high CFM and silence. I found a lengthy discussion from last December talking about a single processor replacement but I thought I'd solicit current recommendations, especially for dual processor.
Thanks

Answer 1

The specs aren't too hard to find; I just searched: " Sunon PMD1206PTB1". Google brought me to a Sunon site.
http://www.tmcscsi.com/Sunon.shtml
the above link doesn't seem to work as a link, but when I type it into my address bar, it works fine. Go figure!
which tells all. The KDE1206PTV1 fan is a different series and rated at 23.5cfm and 33.5 dBA, which I think we knew; it also runs somewhat slower and draws about half the current. More importantly, there are probably half a dozen 60X60X25mm fans of either the PMD or KDE series that would fit, and would push more or less air at more or less noise. What it doesn't tell is what your ear would call an acceptable compromise. In general, of course, more cfm, more dBA. It also doesn't tell how these stats compare to other brands; I ran it all down at one time, and it's a rather laborious process, but it can be done. I didn't have any frame of reference, so it was all just numbers to me; I set the whole matter aside until just now with your inquiry.
I wouldn't worry about the connectors too much; I fit QS fans to the DA model and wind up connecting them with Molex plugs and no problems. The replaced SilenX fan had three wires, of which only two were used, and it worked. Most PCs use a third wire to turn the fan off or on, or up and down, or something - which Apple doesn't. N.B. If you use the Molex connector, you will note that the red (5v) wire plugs into the yellow (12v) socket; not to worry - it spozed to. The PMD fan I got came with two wires, bared at the ends, but no connector(s). I wound up jury-rigging the connexion. PC accessory houses that sell fans also sell wire adapters of dozens of configurations, just search. My two favourite such houses are Xoxide.com and pcToys.com. I think I got the Sunon fan(s) from Allied Electric (alliedelec.com) for about $12 and $12 s&h, which is a minimum figure. You can ship multiple fans for that.
Sunon says its fans work on the Mag-Lev principle, so lubrication wouldn't help much. What would hurt would be an unbalanced fan, so it might help to clean the crud off the blades - evenly, if possible.
I keep wondering what a slot fan would do to cooling and noise, but that may be a thought better postponed. First should be getting the CPU acceptably cool. I also understand it helps cooling if you clip some of the grillwork in front of or behind the fans (power supply fans, especially).
Just a few thoughts ..... Jon