Hi bro thanks. but can advise me like how this setup is much efficient than the one i quote?
For the mobo, MSI the brand ok mah? cos i see online like not good and is 8 gb ram is sufficient?
I am just gonna add to the already recommended specs that others has given.
1) Cpu: Get the non-k i5-4570. the 'k' version is for overclocking
2) Motherboard: this one u need to research by urself as some motherboard comes with internal wifi and 1-2 ps/2 ports(your mouse and keyboard interface) go to the manufacturer's website and check out their I/O ports.
3) PSU: In my own opinion, seasonic and Silverstone makes their own(not made in china) so their quality control is much better. If u managed to get a bad one then u are just very unlucky. BTW, its true that 620w is sort of overkill and if you really want to save more you can go for the 500w one that seasonic has. But its better to get slightly higher wattage for a PSU.
4) RAM: you don't need 16GB unless you doing rendering stuff. 8GB is more than enough for games and normal office work. Get the cheapest LOCAL ram. preferably 1600mhz
5) Graphic Card: In my opinion, get the gigabyte 760 GTX 2GB. Its like the best $$ for its value. Palit 760 GTX 2GB is for budget conscious just slightly less performance. If you can wait awhile, NVidia will drop their prices as ATI is releasing their new cards.
6) SSD/HDD: Plextor is the best value for SSD. you can consider it. you might want to consider a 256GB instead if within your budget about S$288 for now.
7) Casing: the best value would be Sharkoon T28.
8) OS: Obviously go for 64bit as 32bit OS limits ram/memory to 4GB.
Its up to you if you want win 8 or 7. You only need the Professional version if you want to use Remote control or domain networks which you won't use so go for Home editing.
If you not sure where to buy:
mynextcomonline <-- if you are lazy/busy to go down. they provide free delivery(>$100) and free assembly if you buy a whole PC(which you are).
They accept only cash on delivery and gives you quite a very reasonable amount of discount for it.
Tradepac <-- if you are going down to simlim this is the place to bargain. But make sure you request to get your boxes and extra cables/stuff back.