LienusLateTips

OK. https://pcplus.ba/product/corsair-cx450m-450-watt-b-sm/ is the best you can get.

Don't, cheap AIOs are usually more expensive than budget air coolers and perform worse. The Vetroo V5 should keep a 12600k cool and only costs $25 US (so whatever the conversion rate is). Either way it's way cheaper than even the cheapest AIOs. 
 
OK, that makes a bit more sense, but I'd still argue you should go for a cheaper B660 motherboard. The Prime B660M-Plus D4 is the much less expensive and has almost the exact same features, just looks a little more plain, and the Prime Z690M Plus D4 is also the same price as that B660 TUF board. 
 
Also I'm pretty sure MSI is coming out with an mATX B660 board, so it's probably worth waiting for and checking that out once it releases. 

If you're getting only a 3200G/580 for 1500USD, even in this market... you are spending too much elsewhere. Probably the RAM and PSU.
 
What country are you located in? (to check pricing)

there is little  to no improvements with a 3080 and gen4 , i doubt it matters for a 3060.
 
https://www.google.com/amp/s/www.techspot.com/amp/review/2104-pcie4-vs-pcie3-gpu-performance/
 
 

Ugh well you don't have a graphics card lol. 
Also what settings are you playing on? Not sure what the current state of igpus is but I wouldn't expect any decent frame rates at 1080p or higher. 

Integrated graphics on Intel 10th gen are not really adequate for competitive gaming. 
 
CS:GO you can mostly get by with just decent CPU power, GTA5 will run an EZ-Bake Oven if you turn the settings and resolution down enough. Valorant you'd need all low settings to have a chance. 
 
12GB of RAM also suggests to me there's a good chance your memory is not running in dual channel, which certainly wouldn't help matters. 

Motherboards usually provide you with one or two sata cables.  The SATA power cables come with the power supply.
But, your configuration doesn't have any SATA hard drives, it contains only 2 M.2 drives, which plug directly into the motherboard.
 
I would argue that it's seriously stupid to pay 90 pounds on 4 coolers.  The case comes with 2 fans already preinstalled.
Just pay 20-30 pounds more on a better case that comes with more fans pre-installed if you think you need that many fans.
 
Also in real world scenarios, you wouldn't notice ANY difference between that 970 Evo plus and the SN550 drive.
You could get a 2 TB SSD for 188 pounds, ex the Adata XPG SX8200 Pro  if you want drives with dram cache and all that, you can see review here : https://www.tomshardware.com/reviews/adata-xpg-sx8200-pro-ssd,5955-4.html
 
 
 

SATA data cables come with motherboards (you dont need one), power cables are on PSU or come with it. Anything that is on the case, as you might guess, comes with the case. You dont need to buy any cables.

Because I think folks are generally decent!  And this is literally how I bought my CPU, A mum, selling off her teenaged son's kit, not wanting to allow him to be exposed to "Facebook marketplace "  and the potential horrors therein.
They were fine and kind, (of course!)

 

Can you buy online? Ebay has tons of options for used buiness grade pcs. I wouldn't buy a new pc for this budget as your gonna cheap out on parts you don't want to that will cause issues(ssd, psu)
 
 

On FB Marketplace prices are often cheaper. I get used stuff all the time for below eBay and RRP - recently picked up a 10900KF and Z590 board for CAD400 (200GBP or so). Another time three P55 motherboards, an i7 6700K and board and a GTX 1060 for $25. 
 
It happens.
 
Now though, this listing sounds like a scam.

If you definitely want something new, and not built with all OEM parts.....
 
PCPartPicker Part List
CPU: AMD Athlon 3000G (14nm) 3.5 GHz Dual-Core Processor  ($92.99 @ Amazon) 
Motherboard: Gigabyte B450M DS3H WIFI Micro ATX AM4 Motherboard  ($74.99 @ Newegg) 
Memory: *Neo Forza FAYE 16 GB (2 x 8 GB) DDR4-3200 CL16 Memory  ($49.99 @ Newegg Sellers) 
Storage: *Team MP33 512 GB M.2-2280 NVME Solid State Drive  ($42.99 @ Amazon) 
Case: Deepcool MATREXX 40 MicroATX Mid Tower Case  ($51.98 @ Newegg) 
Power Supply: EVGA GD (2019) 600 W 80+ Gold Certified ATX Power Supply  ($39.99 @ Newegg) 
Total: $352.93
Prices include shipping, taxes, and discounts when available
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2022-01-17 21:21 EST-0500
 
This is about all you'll get.
You could go down to a A320 board, or get a 250GB SSD, but you wouldn't really be saving too much.

If you're wanting to keep things on one machine then I wouldn't go that route (with direct connections to each set of peripherals). Instead I'd go the RDP + cheap thin client route, but even then you'd have to really ask yourself if that's something you want to get into. Personally I'd just keep it simple and use individual desktops. Used OptiPlex machines are cheap, and that budget can get a very decent system for what they need to be used for. 
 
Edit:
Any particular reason why? Warranty? A used system would offer better bang for the buck at that price level, especially if you want to keep it as cheap as possible. 

programs like aster can do this, but with how cheap used desktops are, Id say its not worth the hassle.

Guessing it's because you have a 3 core Bulldozer chip.
 
And a GTX 950, when SteamVR recommends a GTX 970 as *minimum*

Its a PCIe power connector. It's to provide extra power to the PCIe slots if you have multiple GPUs. If you're just running a single card, don't worry about it.

SK Hynix is pretty well known in the industry for OEM drives, mostly selling drives for prebuilts and laptops. They only recently moved into selling directly to consumers, but their drives are very solid and I'd feel comfortable recommending one. 
 
If it would make you feel better, I know the SSD in the Framework laptop Linus is using is an SK Hynix SSD (I forget the exact model, but it's one of their Gen3 NVMe drives). 

Hardware Unboxed uses the 6900XT for CPU benchmarking.
 
LTT has done plenty with AMD as well.
 
Price to performance literally doesn't matter in these showcase builds.
 
Uh... no?

 
While the RTX 3090 and similar are slower than the RX 6900 XT, keep in mind RTX has... RTX and DLSS. Which people want, or they just like the NVIDIA brand.
Plus, in a lot of cases it's really not cheaper. The RX 6600 at retail costs more than the scalp price for an RTX 3060 where I live. Same with 6600XT/3060, 6700XT/3060 Ti, 6800/3070. Makes zero sense.
 
Somewhat, no, they do, no, yes/no, yes.

Sure, just send an image or text over in the thread. I'm sure other people would too

Probably because it's a little bit out of date, but still very fast, one of the fastest PCIe 3 SSDs. 
 
I'd go with the 970 EVO Plus over the 980 any day if it wasn't too much more. Again you shouldn't restrict yourself to Samsung SSDs.

DRAM makes a big difference if you're moving a lot of small files around/using those files. If it's a largely storage drive... you'll be fine without DRAM. Otherwise, I'd get a DRAM drive.
 
The 970 EVO Plus is the second highest tier model in the 970 series, released 2019-2020, with DRAM. The 980 is the lowest end model of their 2021 980 series.
 
The closest thing you have to a DRAM 980 is the 980 Pro. There are other brands making SSDs just as fast/good with PCIe 4.0, I'd check those out too. Examples on the low end being Sabrent Rocket Q4, Adata Gammix S50 Lite. Higher end including Sabrent Rocket 4/4+, Crucial P5 Plus

You should get whatever is good and cheap and within your budget... within some reasonable limits (for example mines are No QLC drives, just too low endurance and write speeds once the cache is full)
 
If it's for storing movies and games, I'd say just get the 980 or SN550.
 
I'd rather add more money and go for 1 TB SSD, instead of paying 24$ (or whatever in your local currency) more and still get 500-512 GB. A regular person playing games and normal applications won't really "feel" that extra performance, it's a waste of money.
 
edit: I'd have no problems ordering a QLC SSD for an office pc, for example at work the PC is 90% of the time doing Excel spreadsheets and a proprietary application that works with a database on another server.  The performance of the SSD on the local machine doesn't matter so I wouldn't care if it's QLC or not. But for home, it would bother me.

No, it's 3D TLC memory, Micron 64 layers.  You get higher speeds because 64 layer memory chips are faster than the latest 96/112/128 layer chips  (which are now made because they're more profitable, get more capacity in a chip, but because more layers, you get less overall speed per layer)
 
WD SN750 has dram and also uses the older 64 layer Sandisk / Toshiba 3D TLC and you get decent speeds (3.5 GB/s reads, 2.6 GB/s writes) ...
 
WN SN750SE is dramless and uses other memory chips.
 
A lot of SSDs use some portion of the memory chips in pseudo-SLC mode as a write cache, to improve write speeds.  For example, they take 30 GB of TLC where each TLC cell holds 3 bits, and they switch it to SLC mode where each cell only holds 1 bit ... so you get around 10 GB of SLC memory which is faster and has higher endurance (instead of 2000-4000 erase cycles, you get 8-10k+ erase cycles on this pseudo-slc memory area)
 
On a 500-512 GB SSD, typically a SSD controller will usually have between 12 and 80 GB of pseudo-SLC memory, but of course the amount will decrease as you fill up the drive with data.
But the point is you'll get very fast writes for as long as you fill this pseudo-slc amount and then write speeds will decrease a bit. So for example, you could transfer a 20 GB video to the SSD and you wouldn't notice a performance drop, but do the same with a a 100 GB archive and you may notice speed drop a bit once you go above 50 GB or so... it depends on the SSD.
 
In the case of WD SN750, the cache is set to 12 GB, and once it fills the write speeds drop to around 1.5 GB/s
On a 970 Evo 1 TB, you get around 30-50 GB and then the write speed drops from 2.5 GB/s to around 1.2 GB/s :
 

Probably because it's a little bit out of date, but still very fast, one of the fastest PCIe 3 SSDs. 
 
I'd go with the 970 EVO Plus over the 980 any day if it wasn't too much more. Again you shouldn't restrict yourself to Samsung SSDs.

First, these issues wouldn't cause capacitors failure. Second, they were fixed in post 2018 revisions of Seasonic Focus. Third, current revision Seasonic Prime has similar issues, so if anything, replacing your Focus with Prime would just potentially make things worse if you're planning to upgrade the GPU. And lastly, PSU efficiency doesn't really correlate with it's quality and overall performance, there are 80+ Gold PSUs that i'd recommend over some 80+ Platinum/Titanium any day, including Prime PX/TX.