I've looked around and seen similar issues but I felt this was still unique enough to warrant a new post. Sorry if you disagree, Not trying to annoy or offend. Well to start here are my specs:
1 x COOLER MASTER HAF 922 RC-922M-KKN1-GP Black Steel + Plastic and Mesh Bezel ATX Mid Tower Computer Case
1 x ASUS P6 X58-E PRO LGA 1366 Intel X58 SATA 6Gb/s USB 3.0 ATX Intel Motherboard
2 x XFX HD-685X-ZNFC Radeon HD 6850 1GB 256-bit DDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity
1 x CORSAIR Enthusiast Series CMPSU-850TX 850W ATX12V v2.2 / EPS12V v2.91 SLI Certified CrossFire Ready 80 PLUS Certified Active PFC Power Supply
1 x Intel Core i7-950 Bloomfield 3.06GHz LGA 1366 130W Quad-Core Processor BX80601950
1 x G.SKILL Ripjaws Series 12GB (3 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9T-12GBRL
1 x Western Digital Caviar Black WD1002FAEX 1TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
1 x LITE-ON DVD Burner - Bulk Black SATA Model iHAS124-04 - OEM
Running Windows 7 ultimate 64 SP1
So here is the problem. Random shutdowns, and when I say random I mean seriously random. The shutdown is just that, bam off, like someone yanked the power cord, no BSOD, No errors nothing.
It's not a heat issue, all temps are below 30C at load. ( Partial water cool with an aftermarket cooler, Corsair H50)
CPU is okay, no bent pins or errors.
Not GPU.
Now for the REALLY tricky bit. When it cuts off, if i try to power it back up, it enters an infinite 5 second power cycle. Now if I slightly unplug the 24 pin connector, the power cycle stops and it powers up, but wont post or boot UNLESS.... I clear the CMOS. Checked CMOS battery with multimeter its fine, also this is the second MOBO, first was ASUS Sabertooth, same issues. Also No overclocking.
From here it boots normally, no errors. In fact the only error is that event viewer says the system suddenly lost power and shut off. Which is obvious.
Now here are some tricky bits, I've tested the PSU with a multimeter both voltages and current and they are all nominal. But two things make me think it could be a PSU issue, first that adjusting the 24 pin connector ends the power cycle, and that when it cycles power only comes on to a few areas... the mobo, the HDD, PSU cooling fans, and only 2 case fans ( all these are fans that are directly connected to the PSU along the same modular cable). Not all the fans come on.... might just be that cable is bad? or good?
The other tricky thing is that the RAM is DDR3 1600 but BIOS runs it at 1066 for some reason.... its not on the QVL for the mobo but it came as a bundled pack and I doubt it would have been if it was incompatible. Plus the Ram seems to work fine, and how could it cause shutdowns, and power cycles that require resetting the CMOS?
Now the shut downs are VERY Random. Like I could have one after every boot, or it could take like 36 hours. Sometimes I can go months without issue and then bam every day. I havent changed anything in loooong while. Built this rig in June, worked great till like December, got a new mobo ( the P6) after trouble shooting, worked fine till like last week, shut off like twice. Just re-installed windows again thinking it was software related since I didnt do a fresh install when I put the new board in. Now its happening more frequently rather than less...
I haven't replaced the PSU yet because I'm still not sure that's the issue, and I don't want to buy a new PSU only to have the issue persist. Not trying to rebuild my whole rig, I don't really have the money plus im an Electrical Engineering student, shame I didn't do Computer Engineering... then I might have figured out the issue....
Does anyone here know what the problem is? And if you do think its a PSU issue, do you mind recommending a good modular PSU.... Bare minimum I need is 621 watts... but Id prefer something stronger, rather have power to spare than not enough...
Thanks in advance.
1 x COOLER MASTER HAF 922 RC-922M-KKN1-GP Black Steel + Plastic and Mesh Bezel ATX Mid Tower Computer Case
1 x ASUS P6 X58-E PRO LGA 1366 Intel X58 SATA 6Gb/s USB 3.0 ATX Intel Motherboard
2 x XFX HD-685X-ZNFC Radeon HD 6850 1GB 256-bit DDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity
1 x CORSAIR Enthusiast Series CMPSU-850TX 850W ATX12V v2.2 / EPS12V v2.91 SLI Certified CrossFire Ready 80 PLUS Certified Active PFC Power Supply
1 x Intel Core i7-950 Bloomfield 3.06GHz LGA 1366 130W Quad-Core Processor BX80601950
1 x G.SKILL Ripjaws Series 12GB (3 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9T-12GBRL
1 x Western Digital Caviar Black WD1002FAEX 1TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
1 x LITE-ON DVD Burner - Bulk Black SATA Model iHAS124-04 - OEM
Running Windows 7 ultimate 64 SP1
So here is the problem. Random shutdowns, and when I say random I mean seriously random. The shutdown is just that, bam off, like someone yanked the power cord, no BSOD, No errors nothing.
It's not a heat issue, all temps are below 30C at load. ( Partial water cool with an aftermarket cooler, Corsair H50)
CPU is okay, no bent pins or errors.
Not GPU.
Now for the REALLY tricky bit. When it cuts off, if i try to power it back up, it enters an infinite 5 second power cycle. Now if I slightly unplug the 24 pin connector, the power cycle stops and it powers up, but wont post or boot UNLESS.... I clear the CMOS. Checked CMOS battery with multimeter its fine, also this is the second MOBO, first was ASUS Sabertooth, same issues. Also No overclocking.
From here it boots normally, no errors. In fact the only error is that event viewer says the system suddenly lost power and shut off. Which is obvious.
Now here are some tricky bits, I've tested the PSU with a multimeter both voltages and current and they are all nominal. But two things make me think it could be a PSU issue, first that adjusting the 24 pin connector ends the power cycle, and that when it cycles power only comes on to a few areas... the mobo, the HDD, PSU cooling fans, and only 2 case fans ( all these are fans that are directly connected to the PSU along the same modular cable). Not all the fans come on.... might just be that cable is bad? or good?
The other tricky thing is that the RAM is DDR3 1600 but BIOS runs it at 1066 for some reason.... its not on the QVL for the mobo but it came as a bundled pack and I doubt it would have been if it was incompatible. Plus the Ram seems to work fine, and how could it cause shutdowns, and power cycles that require resetting the CMOS?
Now the shut downs are VERY Random. Like I could have one after every boot, or it could take like 36 hours. Sometimes I can go months without issue and then bam every day. I havent changed anything in loooong while. Built this rig in June, worked great till like December, got a new mobo ( the P6) after trouble shooting, worked fine till like last week, shut off like twice. Just re-installed windows again thinking it was software related since I didnt do a fresh install when I put the new board in. Now its happening more frequently rather than less...
I haven't replaced the PSU yet because I'm still not sure that's the issue, and I don't want to buy a new PSU only to have the issue persist. Not trying to rebuild my whole rig, I don't really have the money plus im an Electrical Engineering student, shame I didn't do Computer Engineering... then I might have figured out the issue....
Does anyone here know what the problem is? And if you do think its a PSU issue, do you mind recommending a good modular PSU.... Bare minimum I need is 621 watts... but Id prefer something stronger, rather have power to spare than not enough...
Thanks in advance.