Help! PSU Problem?

[megalomania]

Hi all, help me please!

My PC specifications:
Mobo: Abit IS7
Processor: Pentium 4 HT 2.4 GHz
RAM: 1.25 Gb, consisting of 3 DDR1 pieces (2x512Mb Kingston KVR + 1x256Mb Kingston KHX)
VGA: Winfast A6600GT AGP 128-bit 128 MB DDR
HDD: Maxtor 80 Gb + WDC 80 Gb PATA
ODD: Pioneer DVR-112 + Plextor PX-W1610A
PSU: FSP Saga 400 Watts
Fans: 4 units of 8cm casing fans + 1 additional slot-type 8cm fan
OS: WinXP SP2

I don't overclock my PC, but I've been getting frequent blue screens, most of them saying: IRQL_NOT_LESS_OR_EQUAL

I tried:
- replacing VGA with Elsa Synergy4 380XGL
- removing the KHX 256 Mb Kingston RAM
- swapping pieces of DDR to other RAM slots

After some tests, I found that the VGA cards were okay, and the problem was the damaged Kingston KHX memory.
But it didn't stop there. After removing that RAM, the blue screens still occured, but not as frequently as before.

BIOS Health Status:
CPU Core 1.45 V
DDR 2.59 V
AGP VDDQ 1.53 V
DDR VTT 1.28 V
ATX +3.3V 3.23 V
ATX +5V 4.99 V
ATX +12V 11.85 V

Just wondering whether my PSU is damaged too.
Any help very appreciated.

[mp666]

The first thing you should do, if you didn't already, is to make a clean OS install. Long term usage with a bad memory stick will definitely cause some corruption.

[spursindonesia]

Yeah, or the motherboard itself is going gaga over you (the memory controller over the northbridge chipset).

[megalomania]

Originally Posted by mp666

The first thing you should do, if you didn't already, is to make a clean OS install. Long term usage with a bad memory stick will definitely cause some corruption.

Thanks, this is a new knowledge to me. I'll try to clean install the OS.

Originally Posted by spursindonesia

Yeah, or the motherboard itself is going gaga over you (the memory controller over the northbridge chipset).

Do you mean the memory controller is possibly damaged? Any solution to this?
Thanks.

[chrisTian]

A new motherboard, of course.

[Yanz]

You can try runnning memtest. If errors happen, that doesnt always mean the RAMS bad (but it could be), maybe something else (like the failling northbridge).

Also look inside the PSU unit, hope there no bad capacitors there (like mine)...

[370forlife]

Try a different psu that is known good. The lower end older FSP's are notorious for teapo caps on the secondary that will vent.

[370forlife]

Originally Posted by Yanz

You can try runnning memtest. If errors happen, that doesnt always mean the RAMS bad (but it could be), maybe something else (like the failling northbridge).

Also look inside the PSU unit, hope there no bad capacitors there (like mine)...

Dang it yanz, I was about to link that thread of your fsp, then I noticed your user name.

[Quiksilver]

Sounds like a motherboard or Hard drive problem to me. Also using any software to measure PSU voltage is inaccurate (this includes the BIOS). Use a digital multi-meter.