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Instability after Installation

Hey everyone, I'm having quite the issue right now.

I just installed my brand-new AX750 PSU into my system about 3 hours ago (Christmas came early! :D ) to replace my ModXSteam 500w.
Everything went fine, until I powered my computer up. It booted normally but I can't go two minutes without it giving me a BSOD.

The error message is always a ntfs.sys. All 5-6 times I've tried. The last time I booted into Safe Mode and that only extended functioning by 30 seconds. :ouch:

Here are my system specs:
PII 955 stock
ASUS M4A79XTD
Sapphire HD 4850 512 mb
Xigmatek DK
WD Green 500gb
LG combo ODD drive
Lexa S

Yes, underwhelming for a 750w PSU but I wanted a solid foundation to upgrade the GPU and CPU on later.

So is this because my system isn't getting enough power? I've never ran into a 10+18 pin ATX cable so I installed it in the places like this:

Specs
_________________________________
12 pin 12 pin 8 pin 10 pin
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ x x x x x
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ x x x x x

6 pin 6 pin...etc... 18 pin
_ _ _ _ _ _ ... ... x x x x x x x x x
_ _ _ _ _ _ ... ... x x x x x x x x x

Fan Grill
_________________________________
Is this the correct way to install it?

Thanks for reading and Happy Holidays! :wahoo:
9 answers Last reply Best Answer
More about instability installation
  1. The only thing that stood out to me was the lack of EPS12V support, only ATX12V on my motherboard. Is that what's wrong?

    The videos weren't much help since I pretty much did exactly what was shown during my installation.
  2. Best answer
    You have a "10+18 pin ATX cable"?

    I didn't think there was such a thing.

    The Corsair Professional Series Gold AX750 (CMPSU-750AX) only has an ATX power connector that has a detachable 4-pin mechanism in order to support either a 24-pin or a 20-pin socket on the motherboard (i.e. 20+4 pin ATX main power connector).

    The EPS12V power connector has a detachable 4-pin mechanism in order to support either an 8-pin socket or a 4-pin “P4/12V” socket on the motherboard.

    The ntfs.sys error message indicates a problem with the boot device. Is your SATA/HDD controller mode in the BIOS setup menu set to the proper AHCI mode or IDE compatibility mode or RAID mode that it was set to when you originally installed Windows?

    Was the system completely functioning properly before the PSU was changed?

    Is the PSU swap the only change that was made?
  3. With the 10+18 ATX cable I meant the part that plugs into the PSU itself, not the mobo. But moving on.

    The only change that was made was the PSU. I switched back and there are absolutely no problems and everything went back to normal.

    I used the Win7 Ultimate recovery disk and tried all the recovery options, but no issues came up. Only during the Windows Memory test was there a message that there was a hardware issue. Then it froze with three small white artifacts.

    About the boot devices..my HDD and ODD both boot from the disk and without it.

    I've already contacted Corsair about an RMA but being Christmas they haven't responded. If i don't need an RMA is there anything I can try?
  4. Have you checked within the AMI BIOS Setup Utility --> Power --> Hardware Monitor to see if the voltages are within the ATX specifications?
  5. I put the AX750 back in and it's working smoothly this time..I don't know for how long. I opened up AMD's Overdrive Utility and here are the readings from that:

    +12V = 1.86
    +5V = 2.98
    +3.3V = 1.82
    Vcore = 1.34

    But...the readings I got from the BIOS were

    VCore = 1.334-1.337
    3.3V = 3.358
    5V = 4.999
    12V = 12.251-12.271
  6. DocSuuz said:
    I put the AX750 back in and it's working smoothly this time..I don't know for how long. I opened up AMD's Overdrive Utility and here are the readings from that:

    +12V = 1.86
    +5V = 2.98
    +3.3V = 1.82
    Vcore = 1.34

    But...the readings I got from the BIOS were

    VCore = 1.334-1.337
    3.3V = 3.358
    5V = 4.999
    12V = 12.251-12.271

    Your BIOS voltage readings are within the ATX12V specifications for those rails.

    The AMD Overdrive Utility readings cannot be trusted.
  7. Thanks ko! Since I booted up this time everything has run sweet as a nut. I don't know what happened but as long as it keeps this up, I'll cancel my RMA to Corsair.

    Thanks everyone who replied and Happy Holidays! :)
  8. Best answer selected by DocSuuz.
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