I have an Fx-60 running dual video cards with water cooling by swiftech (www.swifnets.com). This is my first such setup, after experimenting with overclocking air only, so this is new to me. However I intended to do some serious overclocking and water seemed to be the logical choice.Things I noted about airflow and water cooling:1) large case is needed to fit all the tubing and parts without excessive sharp bends.2) vinyl or tygon tubing kinks easily and requires support - I used the switftech external coils, but you can also use nylon tie-wraps too.3) because the cpu has no fan, the components next to the cpu socket that depend on the cpu fan need cooling. I had a particular hard time because the design of my Abit board is such that the passive heat sinks on the north bridge need active airflow. However, what turned out to be the major issue, the power regulation circuitry got extremely hot with the overclock voltage applied (+0.2 volts), and I had to add an 80mm fan to keep things in check.4) aiflow must all be in-sync, indicating that the air enters the case in the front, and exhausts out the back.5) your airflow must be such that air flows moves over the motherboard. The best design using a towercase as an example is to place a fan at the bottom front, and have the PSU exhaust at the top rear.6) you can get air ducting (cheap) to cool specific components.7) water cooling without overclocking can give you a very quiet system, provided that (a) your power supply is large enough (read, oversized) and has a variable speed fan, (:( your radiator is large enough to dissipate the heat, passively or at low rpm fans.8) water cooling with overclocking does little for noise given the prodigious amount of heat that the system can generate, in particular if multiple video cards are involved.Hope this helps,E.

Hi Chuck and Davis,Thanks for the quick reply and info. I'm off to check it out now.Stay cool,

http://www.amd.com/us-en/Processors/Techni...39_7203,00.htmlLooking at the design guides for Athlon 64, it appears that AMD designs for a Tcase Max value, generally 70C, but in some cases lower, as low as 62C.scott s..

Thanks Scott