Dedayog

It all depends on your CPU and GPU that you want.  A solid 650w will go a long way and 750w will give some overhead.
I run a Ryzen 7700x with overclocked RTX 4080 on a 750w and could easily run it on a 650w as well.
 
What CPU did you get?

I'd probably start with:
 
1.  Update BIOS, Windows, all drivers.
2.  Reset BIOS to Defaults
3.  Memtest, or just run with 1 stick at time to rule out faulty module.
 
Start there, one at a time.  

The sub is a community run and led project. LMG officially acknowledges it, and has "in case of emergency break glass" admin access to it, but to my knowledge they don't oversee it day to day. 
 
The forums are hosted and operated by LMG.

The PSU is overpriced AF
Also use de.pcpartpicker.com
I'd get a 5700x
PCPartPicker Part List
CPU: AMD Ryzen 7 5700X 3.4 GHz 8-Core Processor  (€167.99 @ Mindfactory) 
CPU Cooler: Thermalright Peerless Assassin 120 SE WHITE ARGB 66.17 CFM CPU Cooler  (€48.72 @ Amazon Deutschland) 
Motherboard: Gigabyte B550M AORUS ELITE Micro ATX AM4 Motherboard  (€100.60 @ Amazon Deutschland) 
Memory: Kingston FURY Beast 32 GB (2 x 16 GB) DDR4-3200 CL16 Memory  (€69.90 @ Alza) 
Storage: *Lexar NM620 1 TB M.2-2280 PCIe 3.0 X4 NVME Solid State Drive  (€62.90 @ Galaxus) 
Video Card: ASRock Challenger D Radeon RX 6600 8 GB Video Card  (€212.61 @ Galaxus) 
Case: Montech X3 Mesh ATX Mid Tower Case  (€54.90 @ Alza) 
Power Supply: MSI MAG A650BN 650 W 80+ Bronze Certified ATX Power Supply  (€65.90 @ Amazon Deutschland) 
Total: €783.52
Prices include shipping, taxes, and discounts when available
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2024-04-22 14:48 CEST+0200
 
B550M aorus elite is quite a good price in germany

an i7 7700 is plenty to run a NAS with a bunch of supporting apps on it.  
 
With a GPU to transcode, you'll barely notice a plex load on the box.  

Dozens.  Most made by Fractal.  Namely the North, fantastic case to build in.  Or any of the Meshify line, or Define line.  R6 was a joy.
 
North — Fractal Design (fractal-design.com)
 

Just call any of the other stores, don't email unless you want something in writing.
 
They're pretty good with taking care of the customers, I love both my stores here in Atlanta.  They';ve always done right by me.
 
 

Best deal hands down is the 7800x3d bundle from Microcenter, but you say it's not open yet?
 
AMD Ryzen 7 7800X3D, Gigabyte B650 Gaming X AX, G.Skill Flare X5 Series 32GB DDR5-6000 Kit, Computer Build Bundle - Micro Center
 

Just call any of the other stores, don't email unless you want something in writing.
 
They're pretty good with taking care of the customers, I love both my stores here in Atlanta.  They';ve always done right by me.
 
 

Yeah the cheapest house in my area is like $4,000,000

Hackers 🙂
 

6700XT or 6800 is what I would suggest for 1440p in a vacuum since you don't tell us what games or fps you're shooting for.
 
1440p Minecraft can be played on a calculator for example 🙂
 

6700XT or 6800 is what I would suggest for 1440p in a vacuum since you don't tell us what games or fps you're shooting for.
 
1440p Minecraft can be played on a calculator for example 🙂
 

I use a 7700x and I love it.  You need to change your DDR4 RAM to DDR5 as AM5 only supports DDR5.
 
The MSI PRO B650M-A WIFI, ASRock B650M Pro RS WiFi and the ASUS TUF GAMING B650M-PLUS WIFI are all great mATX boards with great VRM cooling.
 
750w will be plenty, I use a RM750i with my 7700x and overclocked RTX 4080 without issues, I see around 400-450w total system power draw during heavy gaming.
 
Discounts vary from shop to shop 🙂
 
The new CPU's are quite close to release as we have started to see BIOS updates for the Ryzen 9000 series on almost all AM5 motherboards.
But you can always wait for something better right?

Hackers 🙂
 

Perfect thank you very much dedayog

It will have access holes for mic, speakers, etc.
 
No muffling or anything.

It will have access holes for mic, speakers, etc.
 
No muffling or anything.

No, you can leave your Library SSD alone.  Just install Windows on the Gen 4, then Steam.  Go into Settings, and find the Library aspect to point it to the old folder.
 
In the Steam client options under "Download" is a point " Steam Library Folders". Just add the library from D and then restart Steam. Now all the games should be recognized.

No, you can leave your Library SSD alone.  Just install Windows on the Gen 4, then Steam.  Go into Settings, and find the Library aspect to point it to the old folder.
 
In the Steam client options under "Download" is a point " Steam Library Folders". Just add the library from D and then restart Steam. Now all the games should be recognized.

Thank you for the quick response :). Ok then, glad I don´t need to erase library SSD. Have a nice day mate :).

No, you can leave your Library SSD alone.  Just install Windows on the Gen 4, then Steam.  Go into Settings, and find the Library aspect to point it to the old folder.
 
In the Steam client options under "Download" is a point " Steam Library Folders". Just add the library from D and then restart Steam. Now all the games should be recognized.

No, you can leave your Library SSD alone.  Just install Windows on the Gen 4, then Steam.  Go into Settings, and find the Library aspect to point it to the old folder.
 
In the Steam client options under "Download" is a point " Steam Library Folders". Just add the library from D and then restart Steam. Now all the games should be recognized.

It's an either or, not a yes or no.
 
If same price, go 2x.  Easier on memory controllers.
 
Go 4x if your OCD runs your life.

What RAM is it, exactly?
 
EXPO or XMP, it should  have a profile.  Or you can manually set.
 
Pic of Windows showing 3800?  
 
Though this article seems to claim DDR5 starts at 3200MHz...
 
https://www.tomshardware.com/news/ddr5-specifications-8400-mhz-cpu-cores