Reddit mentions of SanDisk Ultra II 120GB SATA III 2.5-Inch 7mm Height Solid State Drive (SSD) With Read Up To 550MB/s- SDSSDHII-120G-G25

You should go with an AMD card anyway. It's not really a good service to your friend to let him buy the worse pick just because you are not used to buying AMD. The R9 380X really is a lot better.

To go with the stock cooler is perfectly fine.

That mainboard is way too expensive for a Z97 board. 4GB ram are also not enough today. It's better to move this to skylake and have a proper basis for the future. You also absolutely need an SSD in this budget area – you don't want the PC to feel as slow and sound as it was 10 years old.

This would be my suggestion:

pc-kombo shared list

Type|Item|Price

----|:----|:----
CPU | Intel Core i5-6500 | EUR 199,90 @ Caseking
Motherboard | MSI H110M PRO-VD | EUR 56,84 @ Amazon.de
Memory | Crucial CT8G4DFD8213 (8 GB) | EUR 26,21 @ Amazon.de
Storage | WD 2TB Blue (2 TB) | EUR 75,90 @ Amazon.de
SSD | Sandisk Ultra II 120 (128 GB) | EUR 55,95 @ Amazon.de
Video Card | Radeon R9 380X | EUR 214,36 @ Amazon.de
Case | Cooler Master N300 | EUR 47,00 @ Amazon.de
Power Supply | Super Flower Golden Green HX (450 W) | EUR 69,02 @ Amazon.de
| Total | €749.17
| Generated by pc-kombo 20.03.2016 |

Your title made me think this was posted on /r/nocontext. You already got your answer, replace your death trap PSU as soon as humanly possible with a better one.

As for a replacement SSD, lemme see. I'm using this one on my laptop. Obviously, you'd get a smaller one. My brother and best friend are both using this one. They both work great so far and they load their respective operating systems within 6 or 7 seconds.

As for your friend, let her know that about 75% of reddit has shit his or her pants at least once after the age or 18. We know her pain. Tell her it gets better and with time she'll overcome the shame. One day she'll even think back and laugh about it. Don't tell her you told us about it though.

Some bits of advice:

1. That Xeon has a 3.3GHz clock. While people will tell you the Xeon works "just as well as an i7", individual clock speed has a pretty decent influence on game performance. I was able to get my hands on an i7-4790k at 4.4GHz (without overclocking!) a few months ago for $238.99 shipped from jet.com. Might want to give a closer look at your CPU choice and check for deals. (/r/buildapcsales should help)
   
   
2. If you're not overclocking, I don't see much of a reason to drop 100 bucks on a liquid CPU cooler. You could put that money towards many different things: a secondary monitor, a mouse and keyboard upgrade, storage upgrade, etc. Even throw it in the bank and save the money.
   
   
3. That's the exact motherboard I have in my rig, the GA-Z97M-DS3H. Works great - My only complaint with it is that there's only one system fan header, meaning if you intend to set up more than one case fan (which of course you do - that case comes with two fans installed) then you'll need a fan splitter similar to this unless you plug your fans directly into the PSU using molex converters, which won't allow your computer to regulate fan speed based on performance.
   
   
4. RAM choice looks good. A good price for 16 GB DDR3 RAM nowadays is $60. I was able to get 16 GB of Patriot RAM from frys.com for $52 after rebate for my build during one of their promotional code deals. They say the brand and speed don't make much of a difference for RAM, so just look out for deals and you might be able to save a buck or two here.
   
   
5. SSD choice is a decent one, and at a great price, but consider also looking into the very popular Samsung 850 EVO or Sandisk Ultra II. I've seen people recommend against the Kingston SSDNow, but I don't have any personal experience with it. I personally have the Sandisk Ultra II and my sister has the 850 EVO (I also have one in my laptop). Can't comment on long-term reliability as all these were purchased less than two years ago but they all work great so far.
   
   
6. Great GPU choice. I would look out for sales on /r/buildapcsales for this piece as well. I was able to get a refurb GTX 970 for $240 from EVGA, and I've seen new R9 390s around that price too. Could probably save at least $20 buying on sale. But definitely good choice with the 8GB model.
   
   
7. I also have the same exact case. No issues with it - love the look and has good enough airflow. Cable management isn't stellar but it's there.
   
   
8. That's a good PSU. People typically recommend the SuperNOVA G2 or GS series or a Seasonic PSU (of which I have this one), but this SuperNOVA NEX scored an 8.5 on jonnyguru, where its lowest scoring category is "Value", which doesn't really say much about its performance. Looks solid to me.
   
   Overall great build. You can save some money here and there. My total build cost about $800 with an i7-4790k and GTX 970. You can probably get yours to about that price with some tweaking and smart buying. Good luck! And let me know if you have questions.

You could go with this:

PCPartPicker part list / Price breakdown by merchant

Type|Item|Price

----|:----|:----
CPU | Intel Core i5-6500 3.2GHz Quad-Core Processor | €219.10 @ Mindfactory
Motherboard | ASRock Z170 Extreme4+ ATX LGA1151 Motherboard | €164.84 @ Mindfactory
Memory | G.Skill Value Series - DDR4 - 8 GB | €45.99 @ Atelco
Storage | Sandisk Ultra II 120GB 2.5" Solid State Drive | €54.89 @ Amazon Deutschland
Storage | Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive | €54.15 @ Amazon Deutschland
Video Card | MSI GeForce GTX 970 4GB Twin Frozr V Video Card | €349.90 @ Mindfactory
Case | Fractal Design Core 2500 ATX Mid Tower Case | €59.89 @ Amazon Deutschland
Power Supply | XFX XTR 550W 80+ Gold Certified Fully-Modular ATX Power Supply | €102.89 @ Amazon Deutschland
| Prices include shipping, taxes, rebates, and discounts |
| Total | €1051.65
| Generated by PCPartPicker 2016-01-04 20:23 CET+0100 |

This allows for overclocking non-K series CPUs. It also doesn't change most of your parts. I also would not recommend using a 430W PSU for this build.

EDIT: I made some changes based on what you wanted to put in your revision.

you can go the super cheap route and spend around $30-40, or spend $55 and get something like this:

http://www.amazon.com/dp/B00M8ABCZM/?tag=pcpapi-20

and not regret spending only $30 later on.

Ah, alright, got it.

Would a SanDisk SSD be a better alternative?

Is it worth it to bite the extra $10 and pick up 16 GB of ram, or to be cheap (and save $10) and stick with 8 GB (2 x 4 GB Corsair Vengeance sticks)?

Logitech G600

SSD

One of these perhaps?

Do you know what the big difference between yours and this one is?

http://www.amazon.de/SanDisk-Ultra-SDSSDHII-120G-G25-interne-schwarz/dp/B00M8ABCZM/

http://www.amazon.com/dp/B00M8ABCZM/

is good choice.

Not really, this is a much better drive and if you can swing the extra $20 get the 240GB version.

/u/Found_Some_Cash

Swap the case for an Aerocool Aero 800 (white/black/blue/grey) case (blue one is like £36 on Amazon atm, or £45 for the other colours), spend the difference on a better SSD, like this one:

https://www.amazon.co.uk/SanDisk-Ultra-Sata-2-5-inch-Internal/dp/B00M8ABCZM/ref=sr_1_50?s=computers&ie=UTF8&qid=1466259434&sr=1-50&keywords=SSD