LukeSavenije

I would agree with @LukeSavenije's list, however since you mentioned high refresh rates I would probably swap the 2080Ti for a 2080 and get the Aorus monitor (https://ca.pcpartpicker.com/product/RPCD4D/gigabyte-aorus-ad27qd-sa-270-2560x1440-144-hz-monitor-aorus-ad27qd-sa). 
 
If you really don't care about 1440p, then take that list and swap out the GPU for a 2070 (or maybe even a 2060) and the monitor for a 1080p 144Hz. Both options should leave you with plenty left to surprise your girlfriend.
 

PCPartPicker part list / Price breakdown by merchant Type Item Price CPU AMD - Ryzen 5 2600 3.4 GHz 6-Core Processor $154.99 @ Amazon Motherboard ASRock - B450M PRO4 Micro ATX AM4 Motherboard $79.99 @ Amazon Memory GeIL - EVO SPEAR 16 GB (2 x 8 GB) DDR4-3000 Memory $84.99 @ Newegg Storage Crucial - MX500 500 GB 2.5" Solid State Drive $61.99 @ Newegg Business Video Card XFX - Radeon RX 580 8 GB GTS XXX ED Video Card $189.89 @ OutletPC Case Cooler Master - MasterBox Q300L MicroATX Mini Tower Case $46.98 @ B&H Power Supply Corsair - CX (2017) 450 W 80+ Bronze Certified ATX Power Supply $19.99 @ Newegg   Prices include shipping, taxes, rebates, and discounts     Total (before mail-in rebates) $718.82   Mail-in rebates -$80.00   Total $638.82   Generated by PCPartPicker 2019-03-01 11:10 EST-0500    

i mean, you probably won't need either except if you got serious work to do...

Yep. But like @LukeSavenije said, no need for that wattage in the first place. My overclocked X58 Xeon (when I'm pumping 1.4-1.45v through it, consumption is much lower now that I have it at 4.2Ghz/1.306v) and Gaming X 1080 Ti will pull 550W when under the highest synthetic load I could give it, in gaming usage was around 450-500W. Measured using my RM1000i, which is overkill but I have and plan to get more power hungry hardware. 

those are good and are internally not that different, but i would choose the rmx because it's a bit newer, but you don't really need 750 watts, you're better off spending less and investing it into your system (or just snakcs)
 
country?

then you really don't need that much. i run my 1070 ti overclocked on 550 watts. on 750 i can run a 9900k with a 2080 ti and still have headroom
 
something like a pure pwer 11. supernova g2, rmx, focus, formula, whisper and many more
 
look into the psu tier list down my signature, and select at least a tier c, then you'll be fine

650? with like 250 watts use
 
math is easy in that case...

i mean, you probably won't need either except if you got serious work to do...

https://m.newegg.com/products/N82E16814150794?ignorebbr=1&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-PCPartPicker%2c+LLC-_-na-_-na-_-na&AID=10446076&PID=3938566
 
This is a better pickup then

Not worth it sadly due to bad pricing placement of it. 2200G is just a better buy

The build @LukeSavenije is more thab enough. The Ryzen 3 is more capable than you think.

Yes. It's a pretty good build, but it's pretty overkill. Also, there isn't even a GPU.
PCPartPicker part list / Price breakdown by merchant
CPU: AMD - Ryzen 3 2200G 3.5 GHz Quad-Core Processor  ($91.99 @ Walmart) 
Motherboard: ASRock - B450M PRO4 Micro ATX AM4 Motherboard  ($79.99 @ Amazon) 
Memory: Corsair - Vengeance LPX 8 GB (1 x 8 GB) DDR4-2400 Memory  ($46.99 @ Amazon) 
Storage: Crucial - MX500 250 GB M.2-2280 Solid State Drive  ($49.85 @ OutletPC) 
Video Card: Sapphire - Radeon RX 570 8 GB NITRO+ Video Card  ($199.99 @ Walmart) 
Case: Thermaltake - Versa H15 MicroATX Mid Tower Case  ($38.56 @ Newegg Business) 
Power Supply: SeaSonic - PRIME Ultra Gold 550 W 80+ Gold Certified Fully-Modular ATX Power Supply  ($79.99 @ Newegg) 
Total: $587.36
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2019-03-01 09:15 EST-0500

Share with the [bb] button, the URL you provided just shows your current list

Just for the record. . .
 

I keep my recommendation, b350 no. b450 yes
 
the steel legend is really cool too, but i want to see reviews of it first
 
i'll just get my mobo list ready
 
(from worst to best, but all good for what you want to do)
ASRock - B450M PRO4
Gigabyte - B450 AORUS M
ASRock - B450 Pro4
ASRock - Fatal1ty B450 GAMING K4
MSI - B450M BAZOOKA
MSI - B450M BAZOOKA PLUS
MSI - B450M MORTAR
Gigabyte - B450 AORUS ELITE
Asus - ROG STRIX X470-F Gaming
MSI - B450 TOMAHAWK
Gigabyte - X470 AORUS ULTRA
MSI - B450 GAMING PRO CARBON
ASRock - Fatal1ty X470 Gaming K4
Gigabyte - X470 AORUS GAMING 5
MSI - X470 GAMING PRO CARBON
Asus - ROG Crosshair VII Hero
Gigabyte - X470 AORUS GAMING 7
ASRock - X470 Taichi
ASRock - X470 Taichi Ultimate

thermal paste does come included with the (pretty good) stock cooler of the 1600
 
all the cables needed come in the box too
 
the h15 does have only one fan, so you could look into getting another fan or 2 with it, or alternatively choose for something like the fractal design focus G

this thread is protected by ponies and tanks

because we are the only ones that survived the mods war

i mean, if it actually fits, i don't see why not

I'd not go for the S12II or M12II. They are very old group-regulated units that are very outdated (v1 was made in 2007, and v2 was in 2013, for comparison most modern power supplies are from 2015 or later). If you don't understand what this means, it means it's outdated as fuck and shitty as fuck.

sounds good to me
 
you just went from a double 4 to a 12 phase my friend, good job

sli isn't worth it in general imo
 
looked into the rtx line yet?

Generally it's better to run a single graphics card, as not all games have SLI profiles, and this is especially true with VR titles. In the future it may be a good candidate for SLI scaling given the nature of how VR is rendered, but right now there are very few SLI VR games.

One single higher performance card is always much better. Get the 1080. Lots of games either don't support crossfire/SLI or they do but poorly so its unstable and nothing is more frustrating than an hour into gaming randomly crashing or to have stuttering while playing. This is from personal experience.