Please, please, please help!

Question

Ok. This is an ongoing problem from me. Maybe someone on here can suggest something that I may have missed.
This is my setup:
MSI K8N NEO4 Ultra the bios that came with the board 1.1 I think?
AMD Athlon 64 3200+
MUSHkin RAM PC3200 DDR400 2x512
1 200GB WD 8MB Cache HD
1 40GB WD 8MB Cache HD
420W Thermaltake PurePower 20pin w/4pin
MSI 6600GT 128MB graphics PCIE
Ok. I don't want to make this post too long that people don't read it, but my problem would take up a few pages. I'll try to summarize it as much as possible. I've built four computers before this and never, ever, have I had this much trouble. Of course I realize this is new technology so what do you expect. Anyways, here goes.
I build the system - all steps go smoothly. I start system, everything is fine. I do a minor OC to 2.2Ghz, the system is fine. I bump it up to 2.3Ghz. Cannot boot to Windows. Reset settings in bios. Try to boot again. OS corrupt. Reinstall windows. Everything goes fine. Reboot. Cannot load windows. No OCing this time. Windows dead again. So I try to repair Windows. That gives me BSOD. Take out 40GB HD and just use 200GB HD. Install windows. Everything goes fine. Install all the drivers, decide to avoid OCing til everything is definately stable. It runs smooth. Next morning, turn computer on, it hangs at Windows loading screen. Reboot. Does the same thing. Reboot again, try safe mode, and it hangs while loading the .sys files.
This time I decide to install Windows Home edition instead of Pro. I also hear that my RAM may be messed up so I switch it out to some PC2100 I had lying around. Everything goes smoothly. It runs good for about two days. This morning I get up, and again, it hangs at the Windows loading screen. Reboot, hangs again at the loading screen.
Now I cut out some stuff - because, basically, I've had to install Windows 9 times in the last four days and it just won't run stable. The last three times I haven't OCed and when I did OC, it wasn't much at all. Now, I've run Sandra in the system and it has said that my CPU was overvoltage, even though I checked and it was set to : Set by CPU, which means auto I think. Same for RAM. I haven't changed anything in the bios other than Floppy to : none.
What in the world is wrong with this system? I'm at a loss and I cannot get it to run stable. Could it be the 20pin PSU I am using? I have the 20pin on the MB connected and I have the 4pin next to the CPU... I've heard some people just use the 20pin and ignore the 4 pin, so I will try that when I get home...after checking this forum for any tips, advice, etc. you guys/gals may have for me...
Thanks in advance, please help!
Obi-Wan Kenobi, you're my only hope!

Answer 1

Could be that you are using SATA ports that don't lock (i dont know about the neo4).
are there any bios/chipset updates available? I have known of several people with thermaltake psu problems with the nvidia/msi boards..
Does the Neo4 come with DOT (dynamic overclocking) if it does, make sure to turn it off. it is not a well thought out feature.