System keeps restarting when it stresses.... psu????

my mobo is an rs480m2. it keeps restarting on playin any games... even fifa 07 and world in conflict... i used to play it earlier without any problem.. but now it restarts as soon as i start a game and keeps on restarting never getting past the boot screen... i have to turn it off and back on for it to boot up completely..
i have run kaspersky internet security full scan two times, defragmented the drive, reloaded the os, updated the bios, scan disk three times, still it falters...
its a slightly old system only used for games

msi rs480m2-il motherboard
amd athlon 3200+
nvidia geforce 6600gt 512mb
hitachi 7200rpm 160gb sata
seagate baraccuda 160gb
4*512mb ddr ram
samsund cdrw 52x
lg dvdrw 16x
2 80mm led fans
6 usb

my psu was a corsair 450w one earlier. it burnt out now i installed a local make called zebronics 450w with 2yr warranty.

here are the voltages and temperatures
Hardware monitor SMSC LPC47M192
Voltage 0 0.00 Volts (+2.5V)
Voltage 1 0.00 Volts (CPU VCORE)
Voltage 2 0.00 Volts (ATX +3.3V)
Voltage 3 0.00 Volts (ATX +5V)
Voltage 4 15.50 Volts (ATX +12V)
Voltage 5 3.28 Volts (HVCC)
Voltage 6 0.00 Volts (+1.5V)
Voltage 7 0.00 Volts (+1.8V)
Temperature 0 33°C (91°F) [0x21] (Diode 1)
Temperature 1 38°C (100°F) [0x26] (Ambient)
Temperature 2 119°C (246°F) [0x77] (Diode 2)
Fan 0 960 RPM [0x80] (FANIN0)

Hardware monitor AMD Athlon 64 3200+
Temperature 0 38°C (100°F) [0x57] (Core #0)

Hardware monitor NVIDIA GeForce 6600
Temperature 0 39°C (102°F) (GPU Core)

Do i need to install a 500w coolermaster psu or a 450w corsair or can u recommend one..
5 answers Last reply
More about system restarting stresses
  1. your temps looks good. I don't think it is the power supply either.

    Try updating your video card drivers, windows update and all...
    Did you try to do some over clocking or Bios tweaking recently?
  2. Does your PC boot and do regular 2D desktop stuff like office apps and downloads OK? Does it pretty much only crash in games, or under other heavy 3D load?

    If the answer to both questions is, "Yes.", it probably is your PSU.
  3. Could be RAM; Run Memtest in the meantime, just to be sure that obvious isnt the culprit.
  4. i updated all the drivers.. i tried to run memtest but it just kept restarting. it restarts when i even try to copy from an external hard disk(with a power supply of its own) to my pen drive!!!!!

    i did not tweak anything!!!

    i think it is the psu... can u confirm??

    this is the important line

    Voltage 4----------------- 15.50 Volts for ATX +12V
  5. The problem with your voltage monitoring is the most of your voltages indicate 0 volts. That means that you cannot trust any of them.

    If you have a multimeter, you can check all the outputs. Yellow wires should be 12 volts, red 5 volts, orange 3.3 volts, blue wire -12 volts, purple wire is the 5 volt standby.

    The gray wire is really important. It sends a control signal called something like "PowerOK" from the PSU to the motherboard. It should go from 0 volts to about 5 volts within a half second of pressing the case power switch. If you do not have this signal, your computer will not boot. The tolerances should be +/- 5%. If not, the PSU is bad.

    Unfortunately (yes, there's a "gotcha"), passing all the above does not mean that the PSU is good. It's not being tested under any kind of load. But if the fan doesn't turn on, the PSU is dead.
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