Hi guys, I'm new in here. Just want some suggestion regarding my desktop customization.

Last few months I customize one for dad (which occasionally I borrowed it for gaming), as i owned a lousy laptop.
Price is RM2800++ with Ori OS and other cha-ba-lang stuff.
Specs was:
-I5 4440 3.1ghz
-Gigabyte B85M-D3H
-4GB 1600 DDR3 RAM
-Sapp R7 260X OC 2GB
-WB Blue 1TB
-Aerocool Strike X 500W PSU
-LG DVD, Samsung 19.5inch LCD LED, W8.1 64bit etc.

Which happen cpu auto shutdown occasionally (twice in a week?), could it be possible low PSU?

Now I'm getting mine as laptop (7years) died. >w<
-I7 4770K 3.5GHZ - RM1085
-Z87-G41 PC MATE - RM 325
-8GB RAM Kingston FuryX - RM277
-Kingston SSD (120GB) - RM 239
-WD Green HDD (2TB) - RM257
-Sapp R7 260X OC 2GB - RM445
-Cooler Master G650M 650W PSU - RM325

Just wonder is the PSU sufficient to power it? >w<
Compare to my previous customization, cost addtional (rm1127) 
Other like DVD, Monitor will buy the same I guess...
Roughly RM4k...    still thinking buy or not such price.

Majority use for gaming , especially for AC series (Assassin Creed Unity coming) 

Any suggestions for cheaper or value per ringgit hardware for this?
Thanks in Advance.