I have a VX 550 power supply that I've had for some years now, but there has been some strange issues. I will try to give an overview of the relevant events:
I think I bought it for an AMD build some years ago and it worked fine.
Then I rebuilt the system to an Intel i7 2600 CPU with an Asus h67-m pro motherboard. It was here the problems started. When I shut down the system, everything shut down fine, but after 1 second the computer turned on again. I checked (and disabled) all wake functions and tried "everything" - but I was forced to always use the power off button at the back of the PSU after shutdown. The computer would then try to start but there were of course no power.
This was irritating - but I could live with it. I tried other OS'er (e.g. booting from Linux CDs with no other disks), tried with almost no memory, disks disabled, latest BIOS, no USB devices, no network - but the problem was always there. I even returned the motherboard for testing, but they found no issues with it and could not reproduce the isses. With all this testing in mind, I concluded with this being a PSU problem, but because the PSU was expensive - I didn't want to buy a new one.
Last week I got a new motherboard for my computer - Asus H77-m pro due to some other issues. I was hoping this also would fix the irritating auto-turn-on issue - but to my disappointment - the issue was exactly the same. The computer turned itself on after shutdown. When it turned itself on - I got a warning from the motherboard that it had detected a power surge and had stopped (before booting Windows).
As I worked on installing new drivers, and setting up the new motherboard I suddenly saw that the issue had disappeared - it shutdown fine and stayed off. I have had no single unintended start after that. I think the thing that resolved it was a BIOS update for the motherboard. There were more recent BIOS for the new motherboard than the old one. So for now it seems fine.
So the questions are:
1. Has there been any such incompatibility issues between 550 VX and these Asus Motherboards?
2. Even if the issue is resolved for now in a BIOS - it seems strange that the motherboard detected this as a power surge issue?
3. Should I replace the PSU even if it is OK for now? I am afraid that there now is a "hidden issue" that might damage some components in my PC.
I think I bought it for an AMD build some years ago and it worked fine.
Then I rebuilt the system to an Intel i7 2600 CPU with an Asus h67-m pro motherboard. It was here the problems started. When I shut down the system, everything shut down fine, but after 1 second the computer turned on again. I checked (and disabled) all wake functions and tried "everything" - but I was forced to always use the power off button at the back of the PSU after shutdown. The computer would then try to start but there were of course no power.
This was irritating - but I could live with it. I tried other OS'er (e.g. booting from Linux CDs with no other disks), tried with almost no memory, disks disabled, latest BIOS, no USB devices, no network - but the problem was always there. I even returned the motherboard for testing, but they found no issues with it and could not reproduce the isses. With all this testing in mind, I concluded with this being a PSU problem, but because the PSU was expensive - I didn't want to buy a new one.
Last week I got a new motherboard for my computer - Asus H77-m pro due to some other issues. I was hoping this also would fix the irritating auto-turn-on issue - but to my disappointment - the issue was exactly the same. The computer turned itself on after shutdown. When it turned itself on - I got a warning from the motherboard that it had detected a power surge and had stopped (before booting Windows).
As I worked on installing new drivers, and setting up the new motherboard I suddenly saw that the issue had disappeared - it shutdown fine and stayed off. I have had no single unintended start after that. I think the thing that resolved it was a BIOS update for the motherboard. There were more recent BIOS for the new motherboard than the old one. So for now it seems fine.
So the questions are:
1. Has there been any such incompatibility issues between 550 VX and these Asus Motherboards?
2. Even if the issue is resolved for now in a BIOS - it seems strange that the motherboard detected this as a power surge issue?
3. Should I replace the PSU even if it is OK for now? I am afraid that there now is a "hidden issue" that might damage some components in my PC.
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