Question PC freezes and no power on usb

[Gkrishyanjo]

Okay so, I'm facing a problem with my PC.

CPU: Q6600
Mobo: Esonic G41
RAM: ddr3 1333mhz 2*2gb
GPU: GTX 650 ti twin frost msi
USB keyboard mouse
PSU:Technos 450W
Windows 7 Ultimate Edition

No overclocks

I was gaming on my PC till night . was working fine...I woke up the next day to open my PC again but found a problem....My monitor would not give display..and many research and googling i found that my motherboard was damaged..
I changed my motherboard to the above mentioned with had low TDP but had option in the bios ...My pc booted in windows ...after 2 3 minutes when i started to game it would freeze ..the gpu was giving me display but the pc was fully freezed with no power to the usb.
I checked for gpu damage by taking out gpu and running PC on intregrated but the same problem..
SO i replaced my hdd as there were 8 current pending sectors (c5)...changed hdd booted a new os into hdd with latest drivers but still the same problem..
i ran cputemp to find out that my cpu was at 58C and gpu at 52C preety normal..

i can run my pc in normal condition like 10 minutes doing something and it would then freeze...there is no exact time when it could do that ..sometimes its at 2 min or 3 min or 20 min ...or sudden freeze when i use cpu and gpu intensive apps or games..what is the problem

Checked solution
Rebooted my pC
latest drivers
no problem in usb keyboard and mouse
new motherboard
new hdd
checked for loose cables
checked and tried resting cmos battery...

Any ideas? Thanks

 

[Calvin7]

See if you can borrow another power supply -400 watts or greater. Try using that.

 

[Gkrishyanjo]

See if you can borrow another power supply -400 watts or greater. Try using that.

Ya i had the same idea that psu wasnt able to deliver enough power during high demand ..will try and reply if it works .thanks!