RAM cooling has been done, the reports I've seen on it have been mixed at best, with some folks claiming slightly increased O/C's and/or better stability (especially when over volting their RAM) but many others reporting no significant change. OTOH, I've not seen any reports that it hurt anything aside from those who damaged their parts while attaching heat sinks or attempting to remove existing heat spreaders. Also if you use multiple banks of RAM, many folks report problems making everything fit, hardly a surprise considering how close together the modules usually are.
As to the mechanics of it, my comments on annodizing are...
1. Annodizing SLOW'S corrosion, it does not STOP it!
2. Any flaws in the annodizing will continue to corrode, as will any scratches or other damage that exposes raw aluminum.
3. It is difficult, verging on the impossible, to create a complete uniform annodizing coat on the inside of a small diameter tube - since the coolant flows through the tube, that is where the corrosion is most needed, but hardest to arrange.
Unless your system is already all or mostly AL based, I would think it might be better to use two peices of copper soldered onto a peice of copper tubing. This would be as easy or easier to make, and argueably more effective to the extent that ram cooling is at all useful.
Gooserider
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Designing system, will have Tyan S2468UGN Dual Athlon MOBO, SCSI HDDS, other goodies. Will run LINUX only. Want to have silent running, minimal fans, and water cooled. Probably not OC'c
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