Will use i7 instead of Ryzen in this build because budget AM4 mobo is nowhere to be found yet, as for the GPU, I'll pick GTX1060 over RX480 because GTA V favors Nvidia GPU heavily.

Intel Core i7 7700 - RM 1424
Asus H110M-K - RM 259
G.SKill Aegis 16GB (8GB x 2) DDR4 2133MHz RAM - RM 510
Palit GTX1060 6GB GDDR5 Dual - RM 1229
Seagate Barracuda 1TB HDD - RM 219
FSP Hexa+ 550W - RM 195
Tecware Edge - RM 149

Total: RM 3985 (ETECH price inclusive of GST)

Intel Core i5 7400 - RM 854
Asus H110M-K - RM 259
G.SKill Aegis 8GB DDR4 2133MHz RAM - RM 255
Zotac GTX1050 2GB GDDR5 Mini - RM 589
Seagate Barracuda 1TB HDD - RM 219
FSP Hexa+ 450W - RM 169
Tecware F3 - RM 119

Total: RM 2464 (ETECH price inclusive of GST)

You can add an SSD if you wish to spend more for a more responsive system (boot time & overall speed), SFF casing is also possible (depends on you).

I can see 2 main reasons:

[Personal Preferences] <--- Most of the people here (the one who asks for suggestion) prefer Nvidia over AMD (don't shoot me ).

[Games & softwares] <--- Most of the time, it is occupied with "Nvidia" titles, hence more GTX1060 than RX480.

The budget range in this suggestion thread is mostly < 5k, that's one of the main reasons why FreeSync/GSync is not in the discussion, yup we know that FreeSync is cheaper than GSync by quite a large margin but 1080p 144Hz FreeSync still costs > 1k, it is not really that budget friendly unless FreeSync upgrade is specified purposely.

Intel Core i7 7700 - RM 1424
ASRock H110M-ITX - RM 283
G.SKill Aegis 16GB (8GB x 2) DDR4 2133MHz RAM - RM 510
Zotac GTX1060 6GB GDDR5 Mini - RM 1229
Seagate Barracuda 1TB HDD - RM 219
Corsair SF450 - RM 460
Fractal Design Node 202 - RM 379

Total: RM 4504 (ETECH price inclusive of GST)

How much cheaper is the used HDD compared to new HDD? If it is not too much then just get a new one

WD Green is a turtle, I'll spend more to get a 7,200 RPM HDD instead

The usual i3 7100 build will be sufficient, G4560 is also fine but since you are going to rely on iGPU for gaming, i3 7100's HD630 is faster than G4560's HD610.

Intel Core i3 7100 - RM 519
Asus H110M-K - RM 279
Corsair 8GB DDR4 2133MHz Value RAM - RM 259
WD Blue 1TB HDD - RM 219
AVF PSU + Casing ~ RM 150

Total up will be around RM 1430 (Viewnet price).

Ryzen wins in multithreaded/multicore application, most of the games out there aren't fully utilizing the extra core/thread of PC processor yet, hence the one with higher single core performance will win (just like CS:GO & Dota 2).

If you plan to overclock the CPU, then you'll need to get a decent 3rd party CPU cooler and mobo.

I'll request for HDD health and bad sector report first, at least I get to know the status of the HDD before I make the purchase right

GPU technology is evolving rapidly and people tend to change their gaming card in one to two years of time so the performance that they can get NOW matters the most to them, things might change in the future when Nvidia fails to catch up in the DX12/Vulkan race when they become the primary API.

Avoid fighting with fanboy, pointless to argue with them

Wait, there is a WD Green variant with 7,200 RPM?

AFAIK only the WD Black 2TB is running at 7,200 RPM (for WD branded HDD).

Hmmm, price is way too suspicious, up to you

You can remove the GPU if your sister is ok with games running at low settings with the iGPU.

Intel Core i3 7100 - RM 522
Asus H110M-K - RM 259
G.SKill Aegis 8GB DDR4 2133MHz RAM - RM 255
Palit GTX1050 2GB GDDR5 Dual - RM 559
Seagate Barracuda 1TB HDD - RM 219
FSP Hexa+ 450W - RM 169
Tecware F3 - RM 119
AOC I2280SWD IPS - RM 405

Total: RM 2507 (ETECH price inclusive of GST)

No usage pattern/purpose and budget make it harder for us to share our suggestion

If you want to save money, then you can try to find i7 4770/4790 and re-use your current mobo because latest generation CPU is using a newer socket (1151), thus increasing the total cost for whole CPU platform upgrade.

For your budget, I would recommend getting the i7 4770/4790 (new or used, depends on you, I'll just assume you are going to get a new one which costs around 1.3k) and GTX1060 6GB or RX480 8GB. Both CPU and GPU upgrade will sum up around 2.6k.

AOC I2280SWD, around RM 400
Acer R221Q, around RM 500

Yeah, VA2419 seems to be the best option right now if you are looking for IPS and 24" screen.

Not cheap

The processor clock speed is low so expect the performance of single threaded games to suffer a bit.

Why don't get a new set (or used set) locally? Save all the hassle, and you gonna upgrade the GPU also if you really go for this refurbished PC, it's like spending money for nothing.

If you are looking for same tier (tier 1) PSU that costs the same (more or less) as the EVGA unit that I've recommended to you earlier, then you can consider these:

1. Superflower Leadex Gold
2. Corsair RMx/RMi
3. Cooler Master V series (only for fully modular model)

Or "downgrade" to EVGA SuperNova GQ series (tier 2).

How much is the mobo? RM 500++? If yes then it is overpriced, B150 is last gen chipset, current gen is B250 (the successor of B150), it is not worth to pay for RM 500 for an old chipset when you can buy a new chipset at about the same cost.

Fill-in-the-blanks

Intel Core i7 7700 - RM 1424
Asus H110M-K - RM 259
G.SKill Aegis 32GB (16GB x 2) DDR4 2133MHz RAM - RM 1040
Sapphire RX470 4GB GDDR5 Nitro+ OC - RM 998
WD Blue 500GB SSD - RM 730
Seagate Barracuda 1TB HDD - RM 219
FSP Hexa+ 550W - RM 195
Tecware Edge - RM 149

Total: RM 5014 (ETECH price inclusive of GST)

Depends on the features (3D, render, brush resizing etc.) that you are going to use in PS, some require GPU, some don't need, some won't run without dedicated GPU.

You have to increase your budget for that.

They serve the similar purpose which is to store data (a.k.a storage drive). SSD stores data in the flash memory while HDD stores data in the magnetic storage.

1. SSD doesn't boost the performance of HDD, they work independently. The recently announced Intel Optane memory is the one you are looking for if you want something that can boost the performance of HDD as it is served as a caching drive (you need a compatible 7th gen Intel CPU and mobo to use this feature).

2. And do you need HDD if you already bought SSD? This depends on you, SSD is expensive and usually we still rely on HDD to store files as they are much cheaper than SSD.

3. That's an SSD in M.2 form factor, it can run on SATA or even PCIe NVMe mode, if it is a M.2 SSD with SATA interface then the main difference with normal 2.5" SATA SSD is just the size.

4. As mentioned earlier, SSD is expensive, usually we only use it for OS and frequently used files/apps. 240GB is the standard/common size nowadays. 120GB is around RM 300 while 240GB is around RM 500 (depends on the brand and the price is based on SATA SSD, PCIe NVMe SSD is more expensive).

Which platform? Intel LGA1151 or AMD AM4?

AMD Ryzen is coming soon (11 Apr), 4C8T Ryzen 5 is quite suitable (and cheaper than 4C8T i7) for your usage, are you able to wait for another 11 days (+/-)? If cannot then you will have to stick with Intel Core i5 (4C4T).

Intel Core i5 7400 - RM 854
Asus H110M-K - RM 259
G.SKill Aegis 8GB DDR4 2133MHz Value RAM - RM 255
Palit GTX1060 6GB GDDR5 Dual - RM 1229
Samsung 850 EVO 120GB SSD - RM 285
FSP Hexa+ 550W - RM 195
Tecware Edge - RM 149
ViewSonic VA2419H IPS - RM 515

Total: RM 3741 (ETECH price inclusive of GST)

Intel Core i5 7500 - RM 922
Asus H110M-K - RM 259
G.SKill Aegis 8GB DDR4 2133MHz Value RAM - RM 255
Palit GTX1060 6GB GDDR5 Dual - RM 1229
Kingston SSDNow UV400 240GB SSD - RM 386
FSP Hexa+ 550W - RM 195
Tecware Edge - RM 149

Total: RM 3395 (ETECH price inclusive of GST)

If I were you, I will choose to upgrade the mobo and PSU.

Depends on the display connector of your monitor, if you have 2 monitors with DisplayPort and 1 with HDMI then it is quite straight forward, just use the respective display connector of your GPU and connect to the monitor, then press "Windows key + P" and choose "Extend".

If your monitor doesn't have DisplayPort (only HDMI or DVI) then you need to buy adapter (DP-to-HDMI).

Depends on your requirements, IPS (for better viewing angle and color gamut support) or 1ms (for fast pace games but it's a TN panel).

Intel Core i3 7100 - RM 522
Asus H110M-K - RM 259
G.SKill Aegis 8GB DDR4 2133MHz Value RAM - RM 255
Palit GTX1050 2GB GDDR5 StormX - RM 565
Seagate Barracuda 1TB HDD - RM 219
FSP Hexa+ 450W - RM 169
Tecware Edge - RM 149

Total: RM 2138 (E TECH price inclusive of GST)

You may add an SSD if needed.

This is a tough one, because an entry level BenQ 1080p 144Hz monitor will take ~1.3k already, and you need another RM 400+ for a 240GB SSD

If you only play Overwatch then you can save some money by going for GTX1050Ti instead of GTX1060 (or other equivalent cards).

Intel Core i5 7500 - RM 922
Asus H110M-K - RM 259
G.SKill Aegis 8GB DDR4 2133MHz RAM - RM 255
Gigabyte GTX1050Ti 4GB GDDR5 OC - RM 739
Samsung 850 EVO 250GB SSD - RM 464
Seagate Barracuda 1TB HDD - RM 219
FSP Hexa+ 550W - RM 195
Tecware Edge - RM 149
BenQ Zowie XL2411 - RM 1299

Total: RM 4501 (E TECH price inclusive of GST)

Hunt in Garage Sales for "cheap" Windows 10 key, beware of counterfeit code though.

Get a new GPU (likely to be GTX1060/RX480) and a new decent PSU like EVGA SuperNova/Superflower Leadex Gold series, both items will cost you less than 2k.

Some CPU-bounded games will still show CPU bottleneck symptoms, it is just the matter of whether you can accept the bottleneck (a.k.a lower FPS compared to a GXT1070 with i7 CPU) or not.

Example of these games are Hitman 2016, Watch Dogs 2, TC: GR Wildlands etc, try to lower down the settings (those CPU-bounded one) to obtain a stable frame rate.

Free up the space of your SSD, 8GB RAM is okay for normal usage pattern, but Chrome is known to consume a lot of memory when you open many tabs and Windows will automatically utilize your main OS drive (by default) for pagefile when your RAM is running low.

If insufficient RAM is really the root cause of Chrome occasional crash (you can check Task Manager to monitor the usage), try to get another 8GB DDR3 1333/1600MHz RAM, don't get DDR4 because it is not supported by your current system.