RuZoG

It's literally the same chip Tegra X1 that is in NVIDIA shield. It's capable for casual games and if hacked, great for emulation. 

When forums are your only thing left^

activate it and update it

I've always had better luck in OSX rubbing a variant of WINE called Crossover. Ease of use and frankly I've been able to get more Windows apps and games to run without having to tweak things too much. Not sure if its an option for you or not but the VM Idea isn't bad especially if you are running it from a boot camp partition. Always seen better performance in OSX in a VM with a boot camp partition in both Parallels and Fusion.
 
CrossOver by default makes desktop shortcuts super simple.
 
I hope it helps.

I have an XPS15 and use aa EVGA 1080 in an Akitio Thunder3 and it's not bottlenecked any more than it is by the TB3 bus. The same card in my desktop and I see maybe a 20% hit on perf with similar CPU and using an AIO cooler. It's an expensive solution if you don't have the 1080 yet, but if you do; I've seen the Thunder3 box on sale from time to time for $200. 

With that monitor, probably. That also strongly depends on what games you play at what settings.On AAA titles you may need to start stepping down from the highest settings to just high or medium to keep the FPS really high, given that the card's already 2 years old by now, but the high refresh rate will still have benefits even if you're "only" pushing 100 or 80 FPS.

what  vga card to buy  for  this  monitor??

The XF270HU is likely your best bang for the euro. Here's a good review. The prices have dropped since this review was done.
 

Acer - XF270HU 27.0" 
I already suggested this monitor to you. It's 429 euros and has all the thing you asked for so I am unsure why you are still asking for a suggestion. 

Making up your mind about size and budget would be a good start...
You have multiple suggestions and videos now, so I'm not going to add more.
Basically (partially subjectively I guess) good for gaming will be a  high refresh rate 120/144 Hz monitor. These will most certainly be TN panels in the €400 range, so not the best colours probably.  Higher refresh rates will feel a lot smoother in faster paced games and even on the desktop. If you go with IPS panels, you'll have better colours, but a harder time finding a high refresh rate one that'll fit your budget. I don't really mind my TN panel and with a bit of tweaking in the setting the colours are acceptable for me and I can enjoy movies on it just fine. You'll need to decide what you value more.
 
It is, but you're not really cooperating. What's wrong with all the suggestions people have given you? You're only replies are "what's the best monitor?", you are not even responding to people.

Your speaker header is outlined on page 20 in your manual.
 
Molex cables do take a considerable amount of force and sometimes the pins just don't exactly align. You may need to take a closer look at the male end of the connector and wiggle till the pins align then you may be able to use less force.
 
Make sure there is not a limitter set in your BIOS / UEFI setup that has the system expecting Windows 8.1 or Windows 10. You may even need to select something like Linux in the setup.

Which actual File System are you using in Windows for that volume / disk that the missing files should be on?

Congrats man. It's nice to see it through to the end.

Your Virtual Memory / SWAP / Page should either be managed by Windows and not have a hard limit unless that limit is set to about 1/2 the size of your actual RAM. In your case if you set a limit to 1GB then once the 1GB is exhausted stuff crashes or slows down. Try setting it to 8GB or let Windows manage it for you. Also keep in mind that OS' especially windows start to see big performance hits when there is roughluy only 10% free space left on the volume. 
 
Hope this helps.

DId you try clearing the CMOS? Modern Windows doesn't rely on the presence of a keyboard.
 
Or toggling the selectable BIOS (Switch next to the 24 pin POWER on the mobo)

DId you try clearing the CMOS? Modern Windows doesn't rely on the presence of a keyboard.
 
Or toggling the selectable BIOS (Switch next to the 24 pin POWER on the mobo)

Hello, I'm considering investing a few hundred USD in Bitcoin. How does Bitcoin work with taxes? Thanks.

Powerline is a possible solution.
 
If you are just looking for basic web browsing and possibly some light gaming you can get by with a USB WIFI adapter. They are really cheap and couldn't hurt to try but again something with a physical antenae would yield better performance.