Highest settings in Fallout 4 will not provide a very good gaming experience due to unstable FPS, unless you disable or tune down some of the costly settings like God-rays and shadow distance quality.
BTW 3k cannot get you a i5 + GTX970 nowadays and it will set you back to GTX960/R9 380 only.
Intel Core i5 6500 - RM 885
Gigabyte H170-HD3 - RM 529
GSKill NT 8GB DDR4 2133MHz Value RAM - RM 249
Asus GTX960 2GB GDDR5 Turbo - RM 949
FSP Hexa+ 550W - RM 199
Bitfenix Nova - RM 149
Total: RM 2960 (Idealtech price inclusive of GST)
If you are willing to spend more, you can swap the GPU to GTX970, the cheapest GTX970 is Palit reference card (a.k.a Single Fan model), RM 1399.
The mobo can be downgraded to mATX mobo with 4 RAM slots like Gigabyte B150M-D3H, RM 439 to save some money, case can remain the same (or choose other case you prefer) since it can fit mATX also.
As for PSU, to get something durable and future proof, you can consider Seasonic M12II EVO 620W or Leadex Silver 650W, RM 409 and RM 399 respectively, so when you opt for high end card, you don't have to change it.
Thanks for the prompt reply. Does that mean that if i were to increase my budget to RM3500 I can get a i5 6500 + GTX970 setup? By the way, what is the difference between the Gigabyte H170-HD3 and B150M-D3H?
Thanks in advance.