Comuter turns back off when started

And I'm starting to see why insane 1000 watt PSU's get so many sales.

Unless that PSU is dead, that's plenty. You need to start isolating and testing different parts.

Also, read the other thread that has nearly the same exact title, and read the recommendations.

Also read the other thread that has the title 'Can my PSU handle this' for the other question.

1. Yes

2. Yes

3. Yes

4. Yes

5. Yes

6. This is the second motherboard I have had for this system. Tested the ram one at a time on previous motherboard and ran a mem test on them using an Ubuntu disk.

7. Yes

8. Yes

9. Yes

10. Yes. Link to what I used.

11. Yes

12. Using after market cooler.

13. No

14. Yes

15. Yes

16. Yes

17. Yes

18. Yes

19. No. This is not the first time I have booted it. I shut it down one night and the next day it had this problem.

20. N/A Motherboard does not have integrated video.

It honestly sounds like there's enough power, but it's not getting routed where it's supposed to. I've had this happen before if I've got RAM whose voltage doesn't match the motherboard's default specs. Some boards are good at auto-detecting the correct voltage; some aren't. Some boards are good when you set the memory voltage manually in the BIOS; some boards freak out and do what you're describing.

I'd try doing a CMOS clear and see if you can at least get the system to boot afterward. If so, you'll know for sure that it was some kind of conflict in the BIOS settings. Not sure where to advise you to go from there, but it's a start.

Again, I'm not saying that this is definitely the problem, but it's worth a try. Corsair RAM raises my suspicions, because they tend to make a lot of memory that's non-standard voltage. Especially if it's "gaming RAM."

either CPU or mobo sound bad then.

"I also wanted to add some suggestions that user jsc often posts. This is a direct quote from him:


"Pull everything except the CPU and HSF. Boot. You should hear a series of long single beeps indicating memory problems. Silence here indicates, in probable order, a bad PSU, motherboard, or CPU - or a bad installation where something is shorting and shutting down the PSU."

And you've done 2 PSU's

If after breadboarding you get nothing, I'd either go with a gut feeling and RMA one of them randomly. Or both. Or if only one still has warranty, that one.

Much better to do that than spend money to get another CPU and mobo to figure out whats wrong.