Is inadequate PSU causing random reboots and general instability for my setup

kn1012

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Jan 31, 2013
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Hey all. Have a 400 Watt power supply for an AsRock FM2A78M-HD+ -- the third mainboard I had replaced, after an ECS and I think MSI.

I have a 3.2GHz Athlon ii X4, one 4GB stick ddr3-1600, and a Sapphire R7 240 pci-E video. Also sATA3 SSD. No optical drive; 1 case fan.

Tech at AsRock suggested my power supply inadequate? Suggested a 500 Watt? Problems am having are: Windows Experience Index for RAM dropped to 5.9 from 7.1 with this newest board. Graphics intensive programs (games) cause reboot after a min in. Random reboots while in BIOS menu after 30 sec or so. Etc. Temperatures normal. I updated BIOS to most recent at suggestion of AsRock tech. I'm really at a loss. Is it PSU? CPU? I don't think it's graphics. I tested with another card, an older PCI-e -- nVidia 9800GT -- and it wouldn't let me past POST screen. Reboot loop.

Quick rundown of experience with other 2 boards: #1 as with current board, would randomly reboot while in BIOS, after like 30 seconds. Wouldn't boot past POST. Would enter reboot loop. Board 2 would randomly reboot from within Windows (7 64-bit), BIOS froze once, once sound exploded from speakers- sounded like static- and screen shut off, to power-save mode.

Bought 4GB DDR3-1300 to test w board 2. Same problems, returned stick to OfficeDepot.

Please help me someone! Freaking frustrated; went all out and upgraded whole Athlon 5600+ system after SSD failed. And still after 1 months of send-backs etc.. little progress. At least this board kinda more stable-- it doesn't reboot unless under heavy load.
 

kn1012

Honorable
Jan 31, 2013
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10,640
what model power supply? Just a cheep one that came with my case. My case is model Tiveco 605BG. Do you think a crappy PSU could be the culprit? Should I buy a 500watt?
 

kn1012

Honorable
Jan 31, 2013
93
0
10,640
ended up getting an 550W Antec - Antec TP-550G. found it for $35 on eBay used.. seller had high rating and PSU good reviews.. so I'm hoping it works, solves my PCs issues, and lasts.

Punched my specs into Neweggs PSU needs calculator. It predicted 750 Watts. Read elsewhere though that 500 is enough for most all rigs running one video card. That about right?

If not the PSU, then unless some horrible timing where dying components go- my last resort kinda seems to be contacting AMDs tech support, since Newegg 30-day return window passed w all send-backs etc.

If not CPU, and RAM died between current board 3 and impending CPU troubleshoot... someone told me BestBuy tests RAM. Hopefully for not more than 15 bucks to plop it in machine.

Aye ya yai though. Live and learn. Hopefully I will that quality PSU a must. Well.. I learned googling so far it is.
 

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