After I upgraded my processor my computer started freezing

[Joshane]

After I upgrade my processor(3.30 gigahertz Intel Core i3-2120) into (Intel Core i5-2400) my computer started experiencing freezes to be specific in "GAMES" (GTA V) before i wasn't experiencing those freeze. Before it runs in my computer smoothly with my GPU until i upgraded it, then after having those problems i tried putting back my old processor and the problem of freezing are still there!!! :-(
WHAT IS WRONG???
HOW WILL I FIX THIS???
WHAT TO DO???

Specs:
Board: PEGATRON PEGATRON PEGATRON
Serial Number: 108422810000455
Bus Clock: 400 megahertz
BIOS: American Megatrends Inc. 0207 12/03/2010
Windows:Windows 7 Ultimate (x64) Service Pack 1 (build 7601)
Current Processor(but still experience those freeze):3.30 gigahertz Intel Core i3-2120
Hard Drive:Hitachi HDT721010SLA360 [Hard drive] (1000.20 GB)
Ram: 8GB
GPU&Monitor: NVIDIA GeForce GTX 750 Ti [Display adapter]
G276HL [Monitor]

 

[RechE]

had the same problem for a while and i gound out that it was one ram stick that had something wrong with it

 

[Joshane]

had the same problem for a while and i gound out that it was one ram stick that had something wrong with it

what did you do to the ram??? change the ram?? or change slot???

 

[RechE]

do you have 2x4gb or 1x8gb ? because i had 2x8gb and one of my ram stick had something wrong with it and i just threw it away and my pc worked perfectly