How certain are you of just how high the water level got? Did the processor get wet?
And, there is also the possibility that the power supply is shot even if it stayed above the water level. I would be hesitant to use much of anything from that old box. But, I do think that if you had everything else new, trying that old processor wouldn't hurt the new stuff, but just give you some massive errors.
The problem is, you can never be sure in a situation like this. If the processor were to be shorted in just the right way, perhaps it could draw too much power over the new board.
A few weeks ago my basement got about 5 inches of water in it. My tower sits on the floor and it got wet. It was turned on overnight and I noticed the water the next morning. After several days of drying out I tried to turn on the computer and it powered up, but nothing displayed on the monitor. I am assuming at a minimum the motherboard got fried, but my question is this: I bought a new motherboard and was wondering if I can try to hook up my processor and ram to the new motherboard or would that harm the new motherboard if those pieces were bad also?
I have an intel dg33tl motherboard w/ onboard video, audio, and networking.A quad core processor and 2 GB ram. I also have a different hard drive I will be using, but don't want to screw up the new motherboard. Any ideas?