My PC Freezes with buzzing sound pls help me

[sretan.nikolic]

Alright, few months ago I upgraded my PC with ram, psu and gpu. The problem is, while I'm gaming my screen just become like some solid color, green, yellow, gray, brown, etc. It never happned before and when I upgraded it started happening. And than somehow I didn't touched anything it stoped and it didn't happened like 3 months and today it happened twice while I was playing a game. One guy told me it's happening because the PSU is junk. Please if you can help me and if you think it's because of PSU can you like suggest me a good psu for my system that's around 40$-50$. Ty

My spec:
CPU: Intel I5 2400 3,1GHz
RAM: 3 Sticks of ram.Two of them are 2x2GB and the one I bought 10 days ago is 4GB HyperX Fury ( Maybe this can be problem or ?)
GPU: AMD RX 560 4GB
PSU: Falcon FLC-600L

PS: Sorry for bad English.

 

[Lutfij]

1| I'm not a fan of mixing and matching rams. Remove the single stick of 4GB ram and see if that brings back functionality.
2| Yes, the PSU is an expensive paper weight. It can and will take out more than itself.
3| Where are you located? Where would you like to purchase the PSU from(preferred site)?
4| You forgot to include the make and model of your motherboard.

 

[sretan.nikolic]

1| I'm not a fan of mixing and matching rams. Remove the single stick of 4GB ram and see if that brings back functionality.
2| Yes, the PSU is an expensive paper weight. It can and will take out more than itself.
3| Where are you located? Where would you like to purchase the PSU from(preferred site)?
4| You forgot to include the make and model of your motherboard.

1. Already did and it happened again.
2. Ok
3.I'm from Serbia, but I could buy it on amazon or ebay
4. Dell 6D7TR Optiplex 990 Motherboard

 

[Kisianik]

Just to help, your PC accepts any standard ATX power supply, are you planning to stay with your video card till you get new PC, or you considering video card upgrade in the future, if not:

EVGA 500 B1, 80+ BRONZE 500W (you need 450 watt for your current card) $45 USD https://www.amazon.com/EVGA-BRONZE-Supply-Warranty-100-B1-0500-KR/dp/B00DZ6R9GE/ref=sr_1_1?ie=UTF8&qid=1535617369&sr=8-1&keywords=evga+500b

Anything else I can help you with?