Windows restarts by itself

[zentago]

Well, I think is not windows but my pc

it restarts by itself, it's not the first time

specs
Windows 8.1
AMD Phenom x4 965 3.4 GHz
8 gb ram
nf980-g65
amd radeon 7850 2gb
generic power supply 700w :c

This is what I found on the events but don't know exactly what it means


Log Name: System
Source: Kernel-Power
Event ID: 41
Level: Critical

The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

EventData

BugcheckCode 234
BugcheckParameter1 0xffffe00002fc1880
BugcheckParameter2 0x0
BugcheckParameter3 0x0
BugcheckParameter4 0x0
SleepInProgress 0
PowerButtonTimestamp 0
BootAppStatus 0

 

[popatim]

kernel power is often a sign hat the psu is beginning to fail.

 

[zentago]

kernel power is often a sign hat the psu is beginning to fail.

So, if it is dying

What power supply do you recommend me to buy?