You can sell it off if you wish to move to DDR4.
Intel Core i5 6500 - RM 915
Gigabyte H170-HD3 - RM 488
Corsair 8GB DDR4 2133MHz Value RAM - RM 200
MSI GTX970 4GB GDDR5 Tiger - RM 1535
Kingston HyperX Fury 240GB SSD - RM 385
WD Blue 1TB HDD - RM 215
Seasonic M12II EVO 620W - RM 409
Thermaltake Versa H25 - RM 170
Total: RM 4317 (Techview price inclusive of GST)
If you sell off the 8GB DDR3 RAM, you might be able to upgrade the CPU to i7 6700 (RM 1384), swap the mobo to MSI B150M Bazooka D4 (mATX form factor, RM 399) to cover up the extra cost if needed.
Thanks for your suggestion.
Is there any good motherboard that support 6th generation intel cpu and ddr 3? Or the performance difference between ddr 3 and ddr 4 is too big?