[Budget] RM3000 to RM3500

[Purpose]
Regular tasks such as surfing/MS Office and Dota 2

[Hardwares that will be re-use]
Mouse only.

[Monitor resolution]
1080p

[Games & softwares that use frequently]
Dota 2

[Personal preferences]
Can play Dota in maxed settings

[Location]Kuala Lumpur

I'm a complete newbie; just wondering what else do I need to buy besides the processor, mobo, graphics card, RAM, HD, PSU and monitor? Chassis and keyboard? Do I need a fan?

Thanks for the advice!