PC Lags and Crash while playing

[octans.sigma2]

Im having this problem for like 1-2 weeks .When i start a game it will run for like 2 mins and then it lags and sometimes it crash my pc. Max temps are 40° C both on CPU and GPU. I have most recent drivers for GPU .
I also use a molex to 6pin adapter for my GPU cuz my PSU have only 1 6+2 pin.
The only game i was able to play was CS:GO (130 fps ) but after reinstalling win 10 today it became unplayable as well.

My specs
CPU - I5 4460 3.2 ghz
GPU - Evga GTX 670 2gb
RAM - 8gb 1600 mhz
PSU - 500w
MOBO - Intel H81 BTC R2.0 (bought new in December 2018)

CPU Cooler - SilentiumPC Navis PRO 120 AiO
GPU Cooler - ARCTIC Accelero Mono PLUS

 

[scout_03]

this gpu need a 500 watts psu with 30 amp on the line get one that could hold on power with your system or you will always have those crash from psu cutting of not able to handel all parts in system https://www.evga.com/products/specs/gpu.aspx?pn=f613beb8-86f8-49d7-beef-accedf3675e3

 

[octans.sigma2]

Corsair VS650 White Certified | Is this PSU enough for my PC?

 

[scout_03]

you could use it or get this one modular with 7 years warranty https://www.newegg.ca/Product/Product.aspx?item=N82E16817139207 i use the 750 watts one .

 

[octans.sigma2]

Uhh thats way too expensive for me ... I rather buy theCorsair VS650 White Certified .. Thanks