The system is
i920 clocked at 2.8GHz
ASRock X58 Deluxe
6GB Corsair XMS3
2xGTX 260 in SLI
Unbranded 900W supply (Hi-Power ATX900-???? from Ebuyer - no longer in stock )
2x Hitachi 1TB HDD
Dvdrw
Cooler Master Scout case
The problem is random shutdowns.
These are full shutdowns so no error, BSOD freezes etc. It just as if the plug is pulled from the supply.
This used to happen if I went overboard with over-clocking so I put this down to overheating. In this case the system would shutdown and resart just like a hardware reset.
Just over the last week a new problem has started.
At first the above shutdown and restart would happen but this time under normal load like email, internet, not just hardcore games.
Over the last two days when the system shutsdown the supply has to be switched off and on before it will power up.
This is what I've done so far
Removed and reseated all the components and cables.
Re-compounded all the heatsink inlcuding NB, MOSFET and SB.
Replaced the tower cooler with the stock intel cooler to get some airflow around the NB and MOSFET heatsinks. These were getting hot.
Done a stress test with Furmark and Prime95 to fully load the system supply wise and thermally. This can run for at least an hour.
Disassembled the PSU to check for shorts, solder blobs floating around and general sloppy soldering. The soldering BTW doesn't look great and neither does the rest of the PSU.
Opened up the case with a desk fan blowing in. This still can shut down.
I've had a look around the PSU and motherboard for the capacitor problem but found nothing unusual. The MB has solid caps anyway so I guess this is a long shot.
I'm currently in the process of removing each component one at a time to see if this helps.
The system now tends to shutdown after a few hours as far as I can tell. I leave it idling overnight doing nothing and in the morning it has shutdown requiring the switch off - switch on to get it going again.
My suspicion is the PSU but I don't have a spare to test it.
The behaviour is like the PSU going into overload or short circuit protection.
The fan works and it doesn't appear to be overheating. The problem will still occur with the PSU out of the case with ambient air.
I would like to know if this is a common pattern of a PSU on it's way out.
What other diagnostics could I do to narrow the supsects down?
i920 clocked at 2.8GHz
ASRock X58 Deluxe
6GB Corsair XMS3
2xGTX 260 in SLI
Unbranded 900W supply (Hi-Power ATX900-???? from Ebuyer - no longer in stock )
2x Hitachi 1TB HDD
Dvdrw
Cooler Master Scout case
The problem is random shutdowns.
These are full shutdowns so no error, BSOD freezes etc. It just as if the plug is pulled from the supply.
This used to happen if I went overboard with over-clocking so I put this down to overheating. In this case the system would shutdown and resart just like a hardware reset.
Just over the last week a new problem has started.
At first the above shutdown and restart would happen but this time under normal load like email, internet, not just hardcore games.
Over the last two days when the system shutsdown the supply has to be switched off and on before it will power up.
This is what I've done so far
Removed and reseated all the components and cables.
Re-compounded all the heatsink inlcuding NB, MOSFET and SB.
Replaced the tower cooler with the stock intel cooler to get some airflow around the NB and MOSFET heatsinks. These were getting hot.
Done a stress test with Furmark and Prime95 to fully load the system supply wise and thermally. This can run for at least an hour.
Disassembled the PSU to check for shorts, solder blobs floating around and general sloppy soldering. The soldering BTW doesn't look great and neither does the rest of the PSU.
Opened up the case with a desk fan blowing in. This still can shut down.
I've had a look around the PSU and motherboard for the capacitor problem but found nothing unusual. The MB has solid caps anyway so I guess this is a long shot.
I'm currently in the process of removing each component one at a time to see if this helps.
The system now tends to shutdown after a few hours as far as I can tell. I leave it idling overnight doing nothing and in the morning it has shutdown requiring the switch off - switch on to get it going again.
My suspicion is the PSU but I don't have a spare to test it.
The behaviour is like the PSU going into overload or short circuit protection.
The fan works and it doesn't appear to be overheating. The problem will still occur with the PSU out of the case with ambient air.
I would like to know if this is a common pattern of a PSU on it's way out.
What other diagnostics could I do to narrow the supsects down?
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