Well mister, you don't read your own thread properly.
You have "chosen" a couple of PSUs, and your 'simple question' has been already answered.
For your satisfaction, here is a recap:
Yousif_2 :
will 450W work on it or will there be problems
No, neither of the 380 or the 380X will work on just a 450W PSU; they have too low output on the +12V rail and could also not have the required PCI-E connectors. Get a 550W or better. (DustinV)
Zerk2012 also suggested you go for a 960 which will have a way better chance of running on a 450W power supply.
Yousif_2 :
Will a Corsair VS550 ATX/EPS Vs Series 550 W 80 Plus Power Supply work for the 380x or 380.i have no intention of overclocking it.
To which I said:
It'll work, but the power supply isn't the best quality. Get Corsair CX600 instead of that one. It's better quality.
The card is expensive, so you want it to last. Get a good quality power supply.
For a 'cheap and non-overkill' PSU I'd say you look at any 500W+ power supply which costs around $70 or so(INR 4500+ if you're buying from India and PKR 6900+ if from Pakistan).