So you need a new monitor and would like to board the 4K UHD train? Impossible to fulfill all requirements if this is true
Intel Core i7 6700 - RM 1289
Gigabyte H110M-DS2 (D4) - RM 276
Kingston 8GB DDR4 2133MHz Value RAM - RM 151
Palit GTX1070 8GB GDDR5 Jetstream - RM 1848
WD Blue 1TB HDD - RM 209
FSP Hexa+ 550W - RM 188
Tecware Alpha - RM 199
Dell P2415Q UHD - RM 1859
Total: RM 6019 (ETech price inclusive of GST)
The build list contains all the cheapest parts available in the market already but it is still over your budget

, so you need to "downgrade" your requirements, I suggest you to go with normal 1080p monitor for now.
Thank you & sorry for the late reply.
I guess 6K++ is reasonable for 4K setup & I agree my original budget is quite low. I think I'm gonna increase my budget and go with the 4K monitor like you suggested.
Thanks again.