OT - PC Hardware Help?

SkiFletch

New member
Since I know many of you are very good with computers, I'd figure it's worth a shot asking here to get another few minds on my problem. Been having a lot of system instability for a while now and I'm hoping you guys can help me shed some light on why.

So, a couple months ago I started having stability problems with my computer. It would BSOD, hard lock, crash programs a lot, and occasionally even restart for no apparent reason. Since it had been a good 2 years since I had installed XP I figured it was time for a format/reinstall. So I backed all my stuff up, and just for good measure ran a surface scan on the two WD 80gig SATA drives in RAID 0 individually. Both checked out fine, so I dismantled the RAID array, wrote zeros to both drives, and did a good old fashioned vaccum/cleaning of the whole computer (to remove dust/etc).

Recreated the RAID 0 array, re-installed Windows (after struggling to find the correct RAID driver), and everything seemed normal for a couple weeks. Then the instability problems began anew, same as before only this time it would sometimes lock up in windows startup (something it did not do before). Running a scandisk would usually turn up filesystem errors which once fixed would return the computer to working order. So clearly, bad data is being written to windows driver files. I suspected a RAM problem so I ran a memtest-86 which turned up no errors. Since then problems have gotten steadily worse and the computer will no longer even go into safe mode. I disabled the RAID array again and surface scanned each drive just to make sure and it too came back with 0 errors.

This leads me to believe that another hardware component is screwing up somewhere causing incomplete or bad data to be written to the hard drive, but I don't know how to isolate which component it may be. The system specs are as follows:

AMD Athlon 64 1800+
DFI Lanparty UT
1gig Muskin DDR400 RAM (2x512)
ATi Radeon X850
2 WD 80gig 7200rpm SATA drives in RAID 0 (onboard controller)
Onboard audio
Onboard LAN
LiteOn DVD burner
Custom watercooling

I built the system about 4 years ago back when I used to have time to play games and I used to OC it, but haven't done that in 2 years. Regardless, the water cooling has kept the system very cool even in the dead of summer. Most temps are usually in the 30s celsius.

Anyways, just curious if you guys have any good ideas about what my problem may or may not be and/or how to test it. Especially if you know any DOS or CD-bootable utilities to test processor and motherboard function. Graspin at straws here to figure out which component is the culprit. Thanks for any help.
 
do you have a copy of techies toolkit CD?

i think that has a bunch of utils to test and such.

if you don't have a copy, let me know and I can burn one for you on Monday. If it doesn't have what you need (been a while since I used it for this purpose - so can't remember), its still a great CD to have around for all the other utils on it.
 
Do you have any way of testing the power supply. I've seen weird things happen when a power supply starts to go bad.
 
I would tend to agree with Chrisguy about the power supply, but another thing to do before going out and buying anything is to check the motherboard closely for blown up or leaky capacitors, i have seen systems still boot and power up with this happening.

Go into the bios and disable the onboard Lan and sound and unhook the cdrom. this will rule out those as the culprit.

Chuck
 
Dito on the power supply. I do repairs on the side and have changed some that have been under 1 yr old. Some have taken out motherboards mem and video. So be careful, if it is the power supply which that is what it sounds like from the explanations and eliminations already done, there could be the potential for a meltdown. One other problem I have ran into more with AMD (Heat issues) is the thermal compound where the heat sink contacts the CPU. The thermal compound between them breaks down over time. Take it apart and put new thermal compound like Arctic Silver 5. Check to see if BIOS is monitoring this. If it is and there are heat spikes it could be shutting it down..
 
I had the same problem... and it was a hard drive slowly going bad. Does scandisk always fail on the same drive. Can you disable the RAID and only run off of one drive?
 
Thanks for the input guys. I hadn't even thought of the power supply. I do have all the means necessary to test it. We have an adjustable electronic load and scopes at work which I'm very familiar with so I'll give it a look.

Chuck, I had that problem on an OLD (original athlon) motherboard, so I've allready checked for that :)

Dave, I re-silvered it when I did the cleanup of the case just to make sure that wasn't a problem. Temps have been in the 30s throughout though so I really doubt heat is the problem.

Piazzon, I suppose I could try but would a scandisk even recognize a filesystem on it? I'm not sure how a RAID 0 array deals with filesystems on the individual drives...? Anyways, I can put a quick copy of windows on my external, disalbe RAID, boot to the external, and run a scandisk on the RAID drives. Will give that a shot now since the power supply will have to wait till monday to be tested
 
Ok well, tried the individual scandisk option and couldn't get windows to install on my external, the installer keeps crashing. This kind of instibility leads me to believe it's the power supply, not the hard drive.

So I decided I didn't want to wait till monday and that it was time to cheat. I hooked up three of the 12V wires of the power supply in parallel to my inverter and fired both up. Worked fine, 12VDC at the power supply and 125VAC at the inverter, great. The power supply has a rated current of 29amps on the 12V rail (350watts, ironically the same max of my inverter) so I figued I'd just plug a high wattage item into the inverter and see what it did. Started small, a 60 watt lightbulb, no problem. 2 60watt bulbs, no problem, all voltages still normal. Kept increasing the wattage with more lightbulbs.

When I got to 4 60watt bulbs (240watts total) I noticed immediately they all got dimmer. Probed with my voltmeter and found only 9VDC out of the power supply and 90 VAC out of the inverter. On a hunch I checked my other rails of the power supply and the 3.3v was down to 3 and the 5V was down to 4.5V... The powersupply is clearly not running anywhere near its operational design. I'm sure I'll be able to confirm this with the electronic load and the scope on monday but I'm gonna call this one case closed.

So now the post switches gears. What power supply do you guys think I should be looking into? 24 pin connector, no SLI. Probably something in the 500watt range just to be safe. But I'm of course more concerned with reliability than anything at this point :)
 
Forgot to update, but my initial assumption was correct, the powersupply does not respond well to load, voltages fall off drastically. This is especially the case for fast inductive loads. Pulling 20amps as fast as my relay would allow showed massive dips in the voltage on the scope. Color me surprised.

So now that I know for sure its the P/S, I'll ask once more, anybody got good power supply reccomendations? Focusing on reliability...
 
I've had good luck with both Antec and Apevia(Aspire). I've bought 2 of each for friends and family and they are all still working great. The longest one has been about 4 years now.
 
Good link Dave. I THINK my parents have a 6 year old Enermax. Not a bad price on that one either. Any other suggestions folks? It's been 4 years since I bought one :lol:
 
I do have a PCI-E card, a Radeon x850 and yes, dual SATA drives. Since I'm not nor have I plans to use SLI in the future, I'm more interested in PSU's with a single BIG 12V rail, not these dual medium 12V rails. Too bad nobody seems to sell them anymore...
 
I second Antec, I have a couple of there towers and have used there power supplies for replacements for many years and have let to have one go bad. (knock on wood)
 
Oh, well, I found myself a nice OCZ Modstream 520watt power supply, workin great so-far :). Little pricey, but all the reviews I've read were great and id does have the big single rail that I was lookin for in the first place and I love the modular cables. Only put what you want on there... Genious
 
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