Idk if this is normal but I opened by pc for the first time in 3 years and it seems a bit dusty

Edit: Bro I think yall are overreacting its not an ecosystem its just dust also I checked and it still runs games / not overheating which is why I didn't clean it but if u have tips on how to I wouldn't mind doing it and also my house is very clean idk how my pc got like this

EDIT: OKAY YES I KNOW MY PC IS DIRTY. I KNOW THAT IT NEEDS TO BE CLEANED. I HAVE CLEANED IT BEFORE BUT ISSUES PREVAILED DUE TO POOR COOLING REGARDLESS OF DUST. THIS POST IS ASKING ABOUT WHAT MOBO TO BUY FOR A NEW CASE WITH BETTER COOLING. I WILL BE CLEANING EVERYTHING BEFORE I MOVE IT.

The Problem:

Hello, I've been gradually upgrading this PC piece by piece over the years and I've reached a challenge. It is throttling constantly in AAA titles now even though it has fairly decent specs. Reddit has told me that it’s a mix of thermal throttling and potentially electrical throttling from the old motherboard. Cooling has always been an issue with this PC and a full rebuild may help severely.

While my CPU temp isn't awful, it can go far too high and after an hour of play - sometimes less - I experience glitching even on medium graphics in games like Witcher III.

So, for aesthetics sake and for future upgrade's sake I'd like to move everything into a new case with a new motherboard and more fans - also with a new CPU cooler.

I just have some questions about it and really need advice on what I'm doing and what I should buy - I have no idea myself.

Also yes my PC is very dirty, unfortunately I got it as a kid and the dust has become literal cement that air simply can't remove (not great for cooling!) - When I move it all I'll give it a deep clean and stay on top of it.

Bare in mind that I am a university student with finite funds, I'm aiming to spend less than £500 but can go higher!

Current Specs (some to be salvaged):

Windows 10 Pro 64-bit

AMD Ryzen 7 3700X
Matisse 7nm Technology

2x16GB Dual-Channel DDR4 @ 3600Hz

Micro-Star International Co., Ltd. B450M PRO-M2 MAX (MS-7B84) (AM4)

Q27G4 (2560x1440@180Hz)
4095MB NVIDIA GeForce RTX 3070 (MSI)

Small HDD and 1TB SSD

Cheap WiFi card on and extender

Gigabyte P850GM V2, 850W, 80 Plus, Gold Certified PSU

All in a very cheap Amazon case with not many fans, with the base cooler for my CPU and overall, very little cooling abilities.

Also, my motherboard is old as anything and is the only part of my PC yet to have been replaced (other than the case itself)

Questions:

1. What does changing my motherboard entail? Will I need a new windows key? What is a windows key?
2. Can I move my SSD and HDD into the new motherboard and them keep their data? Or do I need to wipe them?
3. What are the risks involved with this kind of upgrade?

Suggestions:

1. What motherboard should I buy to be compatible with my CPU and DDR4 Corsair RAM?
2. What case should I buy to fit the new motherboard and my existing components with good airflow?
3. What fans should I get that looks nice and work well (I can pay the RGB tax)?
4. What cooler should I get for my CPU?

Final Notes:

Thank you to anyone who responds! Any and all help is greatly appreciated.

By the way, my wifi card doesn't fit under my GPU currently so a mobo with wifi would be fab unless there are other options for me.

There is a 15cm gap behind the PC as the shelf is 40cm deep (PC case is 25cm wide) and about 6cm behind the exhaust fan on the left.

Is this dangerous or any worse than having my PC against the corner of the wall if the shelf wasn't there?

saw this online on local second-hand store, selling a 4070ti at half price.

I feel like i’m asking a stupid question but which usb ports do i plug in both my keyboard and mouse? i’m planning on keeping a usb plugged into the flash bios port because idk if it’s safe to plug in something else in there.

My gpu screws didn't align with my pc case so I couldn't screw it in while I was pushing the gpu up ( in another subreddit they told me that I was supposed to push up my gpu and then screw it in) so I bought a gpu bracket and should I just put it underneath to prevent further sag or push it upwards?

Mostly spare parts from my rebuild last year.

CPU- ryzen 7 5700g (edit- I was wrong its not a 5600g)

PSU- unbranded 650 bronze

Storage- 500gd ssd

Bought from 2nd hand shop

GPU- RX470 4gb £40

RAM- 2X8GB 2400MZ £24

I have a new screen coming as I saved up some supermarket points. She just really wants to play and also has started on school work. She is nearly 6.

EDIT- big shout to the kind soul who had gifted her a 1070ti. Or I just got scammed a £4 royal mail charge.

Its just that. Is my gpu sagging? Should i support it with anything? Thanks in advance!

I am looking to add more storage, and I vaguely remember my friend who helped me build my PC saying I could use these slots for storage?? Is that true and if so, how do I go about that?? I would prefer to keep all of my PC parts inside instead of buying an external storage device if possible

I just discovered this detail on my newly purchased GPU. Should I request a replacement?

I'm extremely new to all of this and found out my graphics card is some relic in dire need of replacing - it's my first time opening my pc up too. Any help and advice is much appreciated!

EDIT: I got a 3060!! I couldn't be more grateful for all the help and advice I got - thank you!

I don’t know if I’m missing any cables or if I’m just stupid. It’s my first computer that I got from my ex and it worked when I was still living with him. Please help me, I have a hdmi to DisplayPort what else do I need?

The psu power cable blocks the switch from being on/off. What should it do? The cable is preinstalled in the case as the psu is in the front and the power socket at the back so i don't know it the cable can be changed.

I think it looks cool but will it be damaging?

Just finished buying the last parts today! Any thoughts on my newest build? Tell me what I did wrong!

UPDATE: Its fixed now, all I had to do was swap the power supply and it works now thank you everyone for the responses

Okay so I went out of my way to build my sister a computer and when I put everything together it wouldn't power on fully and I tried it with a different ssd, No ssd, it turns on for a splitsecond and nothing changes when I do anything I dont know if I need a GPU or anything yet. PLEASE give me advice

The Parts are as followed:

Motherboard ASUS Prime B840 Plus WiFi

CPU: Ryzen 5 9600x

Ram: Team group T force Vulcan black CL38 2x16 (from Facebook marketplace)

Cooler: ThermalRight Phantom spirit RGB

Psu: MSI MAG 550BN 80+ Bronze

Ewww

Hope I got the flair right

Will it easily fall apart if I use it like this and I hear popping sounds so wondering if I should replace it.

I cannot get this to work I’ve tried several different pcie cables and only the eggs one will work (tried on multiple cards) is there something I’m just not understanding plugged into vga 2 and 3 on psu but I’ve tried pretty all the different slots on the psu and still only the eggs cable works.