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Random Lock-ups

Forum Homebuilt Systems : New System Build - Random Lock-ups

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I built myself a new system about a month ago and from the start about once a day it's been freezing. No error, no blue screen... it just totally locks up, mouse and all, and needs to be reset. It seems to be entirely random and independent of what I'm doing. It does however seem like I have to be doing something at least as its never locked up over night when not being actually used.
The first thing I thought of was bad ram but memtest insists the ram is fine. I've Prime95ed it for 12+ hours no errors at all. I've overclocked(cpu and video) it seems to have no effect whatsoever. Same issue just as frequently no matter the speed/temps of the cpu/video card.
Anyone have any ideas? I don't have a clue at this point. I'm running 32 bit XP
The system is as follows;
e5200(stock cooling, upped the fsb to 266mhz x 12.5 = 3325 mhz)
http://www.newegg.com/Product/Prod [...] 6819116072
2 x 2gig corsair xms2 ddr2-800mhz(operating at default specs the whole time)
http://www.newegg.com/Product/Prod [...] 6820145184
BIOSTAR TForce TP43D2A7 P43 motherboard
http://www.newegg.com/Product/Prod [...] 6813138122
Seagate Barracuda 500 gig sata hard drive
http://www.newegg.com/Product/Prod [...] 6822148288
Rosewill RP600V2-S-SL 600W PSU
http://www.newegg.com/Product/Prod [...] 6817182032
EVGA 9600 GSO 384mb(I OC it from 550 to 700mhz only when gaming)
http://www.newegg.com/Product/Prod [...] 6814130356

Message edited by jyjjy on 01-15-2009 at 05:26:20 PM

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It's possibly your PSU. Its a low grade PSU that might cause this problem. I dought its the issue however.

Make sure to update all your drivers if possible. (including windows vista updates)

Also try running a Hard Drive test.
run defrag, and scandisk. Might also want to google and find a non windows one as well.

I've seen this happen before where it was the mouse/keyboard. If you have another mouse or keyboard laying around you might want to try them.

This can be a lot of items so if theres any other details you can add please do share.

something to note:
You know your computer cannot see all of your ram? (it can only see 4gbs max. This 4gbs includes your vidoe ram).

Reply to kubes

I found many lock ups to be the fault of nVidia drivers in the past.

My system is MUCH more stable with an ATI.

maybe try an older driver.

snother video relate cause could be a poor 12 volt rail on the PSU. do you have another PCIe plug?

Message edited by Groo on 01-15-2009 at 07:04:24 PM

Reply to Groo

Windows and all the drivers are fully up to date. I just upgraded the Nvidia drivers last night and haven't had a lock-up since so I'll hope that was the issue. If not I'll try swapping the 6-pin power cable on the card with the other one and maybe try some older drivers if that doesn't work.
The HD was new and windows says it doesn't need defragging. No errors on chkdsk although I haven't done a surface scan. I guess I can try that if it keeps happening.
On an old machine a burner caused it to lock-up so I tried taking this one out but it didn't effect the situation.

Reply to jyjjy

If the problem comes back up let us know. It very well could have been the nvidia driver.

Reply to kubes

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