Sign in with
Sign up | Sign in
Your question

PC reboots randomly, PSU problem?

  • Power Supplies
  • Components
Last response: in Components
March 5, 2010 11:19:36 PM

My computer reboot randomly without blue screen.
I switched OS (from windows to linux) same problem, so i don't think it's a software issue.
I tested all my hardware:
Ram > memtest86
Other components tested with glrm Linux distro and everything seems to be good.
I started thinking that my PSU is not enough for my configuration:

PSU 500W standard (don't remember the brand sorry)
RAM 3072 MB DDR2, 667 MHz, (PC2-5300)
EVGA 9800GTX+ 512Mb
Asus M4A78-E Mobo
320Gb WD HDD + a couple of external FireWire 80Gb HDD

What do you guys think? It's a PSU problem?
If yes what PSU do you reccommend? How many Ampere do I have to supply?
Thanks in advance

More about : reboots randomly psu problem

March 5, 2010 11:33:09 PM

It would help to know the specs on your PSU, but a 500W should be sufficient.

Download HWMonitor and check the voltage and your CPU temperature.
March 6, 2010 3:09:09 AM

Ok here are more detailed specs:

ORION 585d
DC output +3.3V +5V +12V1 +12V2 -12V +5Vsb - Max.A 36A 36A 19A 20A 1A 2A

AMD Athlon™ 64 X2 6000+, 64-bit dual core processor

Asus M4A78-E

Video Card
EVGA 9800GTX+ 512Mb

3072 MB DDR2, 667 MHz, (PC2-5300) dual channel memory (two 1024 MB + two 512 MB modules)

320 GB, 7200 RPM, SATA II hard drive

Optical Drive
18X DVD ±RW super multi-format dual layer drive with LabelFlash™ support (up to 8.5 GB)

Card Reader
15-in-1 high speed digital media manager with Smart Copy button

Atheros L1E Gigabit LAN Controller

I already checked my CPU voltage and temp, everything seems to be normal... Core1 aprox 23°C Core2 aprox 24°C
a b ) Power supply
March 6, 2010 3:43:55 AM

A new power supply would be the first thing I would try, another cause for your problem would be if you are unknowingly over clocking your processor, check that your BIOS is running with default settings.
March 6, 2010 4:44:28 PM

Yes, i forgot to say that i tried to flash my BIOS with a newer version to solve this problem, and all the settings are "Default".

Thanks for helping me with this guys, i really appreciate.
March 7, 2010 4:53:37 AM

Yeah I would get a friend to bring over a power supply to test it. The dual core you have is a power hog plus the 9800gtx+, that psu should be able to handle it, but I'd take into consideration the reputation of hec power supplies.

I'm assuming this is your psu.
a c 144 ) Power supply
March 8, 2010 10:03:44 AM

You need a better PSU. What you have is an obsolete design (no APFC, switchable voltage, really heavy 3.3 volt and 5 volt rail, and relatively light 12 volt rails) dressed up with modern cables.

If the "reboots randomly" means under a heavy graphics load, you definitely need a better PSU. A good 500 - 550 watt PSU would do.

For something like this, I'd put in a Corsair 550VX (41 amp 12 volt rail)