Change the PSU to either M12II EVO or Leadex Silver, S12II isn't modular, he wants a modular PSU.

If you want faster version then go for 7200 RPM one like Seagate Barracuda.

Black is also 7200 RPM, but warranty is longer, I won't recommend you to get Black unless you have money to burn.

And any Blue > 1TB is actually Green re-brand, meaning it is only 5900 RPM (max), Seagate Barracuda's 7200RPM is definitely faster at similar price point.

No problem, just loading time will be a bit longer than 7200 RPM one.

And any Blue > 1TB is actually Green re-brand, meaning it is only 5900 RPM (max).

Hybrid drive as in SSHD? I have bad experience with it, speed is almost similar to normal HDD to me.

Normal 7200 RPM HDD is enough for games nowadays unless you want super fast then prepare your wallet for SSD.

As for media files like song, video, movie then 5xxx RPM one is fine, but transfer time will be longer.

But then by looking at the current HDD price, the difference between 5xxx RPM and 7200 RPM drive is pretty small, so no point to invest in slower drive right?

The mobo you choose only got 2 RAM slots, if you can, switch to MSI B150M Bazooka D4 or Gigabyte B150M D3H, both 4 slots and price is around the same.

Since you didn't mention which video editing software you are using, so I am not going to include a dedicated GPU for hardware acceleration purpose since the iGPU of Skylake CPU is almost equal to the performance of GT740 (except the presence of CUDA).

Intel Core i7 6700 - RM 1369
MSI B150M Bazooka D4 - RM 399
Corsair 16GB (8GB x 2) DDR4 2133MHz Value RAM - RM 400
Kingston HyperX Fury 120GB SSD - RM 229
WD Blue 1TB HDD - RM 215
FSP Hexa+ 400W - RM 155
Deepcool Tesseract - RM 139

Total: RM 2906 (Techview price inclusive of GST)

If you want CUDA as the hardware accelerator for the video editing software (if and only if the software supports it) which speeds up the process, you can drop the SSD and get a GT740/GTX750 etc.

Oh I see, the ASRock mobo is priced nearly RM 400 in KL/KV area.

Mobo upgrade won't improve performance.

What makes you want to upgrade? Bad FPS in games? If yes then you need to upgrade your GPU instead, R7 250X is pretty low end.

You want to make your PC faster but you didn't mention which part is slow and not satisfying you, so I assume is boot time.

If yes, get a SSD, your CPU is fast enough for CS:GO and your current mobo doesn't slow down any components significantly too.

Intel Core i5 6500 - RM 880
MSI B150M Bazooka D4 - RM 399
Corsair 8GB DDR4 2133MHz Value RAM - RM 200
Zotac GTX970 4GB GDDR5 Reference - RM 1399 (Christmas promotion)
WD Blue 1TB HDD - RM 215
FSP Hexa+ 550W - RM 189
Deepcool Tesseract - RM 139
BenQ GL2460 - RM 499

Total: RM 3920 (Techview price inclusive of GST)

You can choose a better looking case/PSU with the remaining budget, SSD can be added next time when you have more budget.

Only mITX mobo can fit into the case, you need to take note on the clearance too when you opt for mITX build especially GPU and PSU length, some mITX is really small and can only fit SFX PSU, but CM Elite 130 is pretty large so hardware choice is still quite wide.

You didn't mention the specific mobo model but LGA1155 is using DDR3 1333MHz by default (most of them) so the new RAM will mostly run at 1333MHz even if you buy 1600MHz.

RAM doesn't consume much power so no need change a new PSU if only upgrade RAM.

You can look for GSKill/Corsair also, but please be noted performance RAM won't improve performance by a significant margin, they are very expensive so just buy what you can afford, if your mobo doesn't support RAM overclocking, getting any RAM with speed more than what your mobo can support is just a waste.

As for GPU, no confirmation date on Pascal and Polaris (rumor) yet, since you are using GTX960 which isn't far away from current technology, I don't see any reason why don't wait.

Can you switch to RAM details instead because this page doesn't show any detail about RAM speed nor mobo model.

Alright your current RAM is 1600MHz also, so no issue to run new RAM with speed of 1600MHz.

You are running dual channel now, so 800MHz x 2 = 1600MHz.

If you buy 2 x 8GB 800MHz and run them in dual channel mode, you will get 800MHz also with each RAM runs at 400MHz respectively.

Intel Core Pentium G3250 - RM 235
Asus H81M-K - RM 240
Corsair 8GB DDR3 1600MHz Value RAM - RM 169
PowerColor R7 250X 1GB GDDR5 V3 OC - RM 299
WD Blue 1TB HDD - RM 215
FSP Hexa+ 550W - RM 189
Deepcool Tesseract - RM 139

Total: RM 1486 (Techview price inclusive of GST)

Due to low budget, I suggest you to use Haswell (4th gen) instead of Skylake (6th gen).

Build based on Dota 2 and CS:GO, if you are really interested to play other games, then you can consider upgrading the CPU to i5 or GPU to GTX960 for better performance.

Intel Core i3 6100 - RM 499
Gigabyte B150M-D3H - RM 439
GSKill NT 8GB DDR4 2133MHz Value RAM - RM 249
Palit GTX750Ti 2GB GDDR5 StormX Dual OC - RM 599
Samsung 750 EVO 120GB SSD - RM 249
FSP Hexa+ 550W - RM 199
Bitfenix Prodigy M - RM 369

Total: RM 2603 (Idealtech price inclusive of GST)

Intel Core i3 4160 - RM 487
Asus H81M-K - RM 240
Corsair 8GB DDR3 1600MHz Value RAM - RM 169
PowerColor R9 270 2GB GDDR5 TurboDuo - RM 529
WD Blue 1TB HDD - RM 215
FSP Hexa+ 550W - RM 189
Deepcool Tesseract - RM 139

Total: RM 1968 (Techview price inclusive of GST)

Will still stick to Haswell for better price/performance, if you want Skylake then you can build this but performance will be slightly weaker.

Intel Core i3 6100 - RM 510
MSI H110M PRo-VH - RM 329
Corsair 8GB DDR4 2133MHz Value RAM - RM 200
PowerColor R7 360 2GB GDDR5 - RM 485
WD Blue 1TB HDD - RM 215
FSP Hexa+ 550W - RM 189
Deepcool Tesseract - RM 139

Total: RM 2067 (Techview price inclusive of GST)

You can find it at E-Tech (Kepong), RM 219.

What makes you feel like want to upgrade? Not satisfied with gaming performance? Slow in booting?

I will go for SSD first, other parts are quite decent for gaming.