Originally Posted by zenyora
as far as the psu goes i have a 550 (antec true power 2.0), with 1x 4 pin pluged in the bored for the cpu power instead of the 6 . which as far as i know should be fine , i even tested with prime just o make sure and everything was fine .
The true power 2.0 550? I had that in my last computer
its an alright PSU (for its day), I never had any problems with it. But i'm a bit worried about what you're saying about the motherboard power as the symptoms you're getting seem a bit like a power issue.
As I understand it there is normally either 4 or 8 pins for extra mobo power (12v) under the ATX 2 specification - under the earlier ATX there was a 6 pin connector (5v) but it was a single row of pins and I'm pretty sure that won't be on your motherboard as its really old.
Prime95 won't max the power consumption of your board by the way, the graphics card will pull power from the PCIE slot and it could be that that is tipping you over the edge - its a theory anyway.
... I just looked up the manual for your mobo and it is an 8
pin 12v connector
I think maybe we are closing in on the problem here... Though I am wondering why your mobo needs the 2x4 connector, i've only seen that before on 2 way systems. I would of thought a single 4 pin connector would of been alright but then why does it have 2x4 ?
Excerpt from manual (i'm sure they use babel fish to write these things):
ATX_12V_2X4/ATX (2x4 12V Power Connector and 2x12 Main Power Connector)
With the use of the power connector, the power supply can supply enough stable power to all the
components on the motherboard. Before connecting the power connector, first make sure the
power supply is turned off and all devices are properly installed. The power connector possesses
a foolproof design. Connect the power supply cable to the power connector in the correct orientation.
The 12V power connector mainly supplies power to the CPU. If the 12V power connector is not
connected, the computer will not start.
• Use of a power supply providing a 2x4 12V power connector is recommended by the
CPU manufacturer when using an Intel Extreme Edition CPU (130W).
• To meet expansion requirements, it is recommended that a power supply that can withstand
high power consumption be used (500W or greater). If a power supply is used that does not
provide the required power, the result can lead to an unstable or unbootable system.
• The ATX_12V_2X4 power connector is compatible with power supplies with 2x2 12V power
connector. When using a power supply providing a 2x4 12V and power connector, remove the
protective covers from the 12V power connector and the main power connector on the motherboard.
Do not insert the power supply cables into pins under the protective covers when using a power
supply providing a 2x2 12V power connector.
The max TDP of your processor is apparently 95 W so I guess it should be ok... I'm suspicious though.
You know I think you can get a 4 pin molex converter cable to plug in beside the other one... It would at least help rule this out as the problem.
This sort of thing:
PI Manufacturing Corp - Motherboard 12V P4 4-pin to Molex 4-pin power Adapter Cable, 12in
The other thing is, what pins do you have your 4 pin connector plugged into, the manual seems to suggest that if you have only 1 x 4 pin connector that it should be in pins 3-4 7-8 (the side closest to the CPU).