Computer freezes for a minute or so and then "comes back"

After a certain amount of time - and that time used to be a lot quicker if I had the screen saver on for any length of time - the computer will start to stop and start. What I mean by that is that it'll freeze for a minute or so and then "come back". And it'll do that about every five minutes or so until I restart the computer. Since turning off the screen saver, I left the machine on overnight and came back this morning to be able to work on it just fine ... until a few minutes about (about 10 am) when it started that stopping and starting behavior.

System

20" ACER AL2002W LCD 1680 x 1050 60 Hz
Asus M2A - VM X1250 onboard graphics not the HDMI version
AMD Athlon 64 x2 4200+ (65W) Dual core socket AM2 2.2Ghz, 512 KB x2 L2 cache
Mushkin HP2-6400 DDR2-800 High Performance Series 2 x 1GB sticks
Seagate Barracuda 320GB SATA HD 7200rpm
Hauppauge WinTV GO-PLus NTSC 44981 REV E199 TV tuner (the one with the mushkin ram)
LG GH20NS10 Black SATA DVD-Writer 20x
350 watt power supply 20/24pins Model number IP-S350AQ2-0 made by POWER MAN

- Increased the voltage to the ram to 2.1 volts that solved the ram problems i had.
(would crash everytime i ran memtest86 or any memory test software)
- Replaced the motherboard on the system to eliminate a problem with the on board video or the dvi port.
- Used different ram on the system to make sure it wasn't the ocz ram which is it has mushkin (prior to that it had OCZ DDR2 PC2-6400 800mhz Platinum XTC Revision 2 2 x 1GB sticks.)
Changed to the vga cable.

The problem with me trying to troubleshoot this is that after a restart it runs fine for 7 to 8 hours maybe more, so i have to make a change and sit there waiting for 7 or 8 hours which i don't have the time to do.

I am wondering if this could be a power problem, but the power supply is running fine and everything on this computer shouldn't take 350 watts unless i overlooked something. Also if anyone has any ideas on how i could make this problem occur quicker like software or something that would be really helpful to.

Any help would be appreciated
 
Yes i have and there are none, it just freezes for a minute then unfreezes as if nothing happened. Also of note whenever i go to My Computer to see all my drives it does the flash light icon for a few seconds, but it is a fresh install with no networked drives on it yet so there should be no reason that it would take so long to find the drives.
 
I have a similar problem. My computer freezes (mouse and everything hangs) then comes back after some seconds. I also have completely different system (Intel board) but the same DVD drive: A LG GH20NS10 drive. And I can see atapi errors in the eventlog when the system freezes. I have unplugged the drive now to see if freezes still occur. Maybe you can also try this.

Hope to hear from you.
 
A ram module can cause this behavior. A cpu that's getting a little too hot can do this. A lower power than needed psu can cause this too. Get some temp monitoring programs on board and watch those temps. It's more than likely something's getting too hot. There are #1...Core Temp...#2...P.C.Wizard...#3...Everest Ultimate .... Also I'd be careful as to leaving it on all night unattended. If the fan quit you would have a problem. Good Luck.
 
No, temperature isn't a problem. The freeze sometimes even occures with a fresh started machine and I don't do any CPU stressing processing so CPU temp is < 30°C all the time.

And I have checked the RAM with memtest several hours without any error reported.

I have replugged the DVD drive now, updated its firmware an changed the controller mode in BIOS from IDE to AHCI. Maybe some of this helps.
 
Just want to let you know that the problem seems to be solved. No freeze since 16 days. Don't know if DVD firmware update or AHCI mode is the reason but who cares.
 
Another update:

After a long time the problems with freezing returned end og June.

I installed latest nforce SATA/IDE drivers now (nvgts.sys 9.99.0.9; found them reading in a EVGA support forum) and I hope that this will finally solve the problem.
 
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