But, if your only experience in building your own PC was from years ago, you'd be in for a pleasant surprise. Nowadays there's very little to worry about. No jumpers, easy cable management, even the front panels are no longer the mess they used to be. You can even avoid dealing with ANY cables at all for your SSD, if you go with the M2 form factor.
You can build from start to finish in less than one hour. It takes longer to install the OS (if it's Windows), than it takes to assemble the machine.
Of course, then there's part selection. Which is now exceedingly easy, thanks to the likes of https://pcpartpicker.com/
Don't know what to pick? Well, there's plenty of builds by other users. Pick one, modify to taste. The site will let you know if there are incompatibilities. In my case it even warned me that a GPU I wanted was too big and might not fit.
You can even have 'parametric filters'. For instance, say you want 16GB of system memory and you don't care about brand. You can say "I want 16GB, in either 1x16GB or 2x8GB, rated 3 stars or above, pick the cheapest". And it will pick one, usually linking straight to the product page(those may be affiliate links, not sure but I'm ok with that).
> I'm also less interested in those huge, full of fancy glowing RGB lights, gaming rigs and more interested in something small, silent and discreet.
I got a PC that's only slightly larger than a PS4. No RGB lights or anything. That's entirely up to you, even more so if you are choosing your own parts.
Unless you get case which is too small, and you have problems getting you hands in there.
You can build in this case pretty easily as long as you don't try to do fancy things, like custom loop. It's smaller than the Corsair One, and you get better upgrability. It's small and discreet. Silent depends on what parts you pick.
There are many other cases that are similar, but not quite as space-optimized. Popular ones include the Ghost S1, and the Ncase M1. All three support the same-caliber specs you would get with a Corsair One.
Let me know if you want help selecting parts/building in such a case.
Edit: What I really need is a 5.25" slot on one of these so I can stick in a 3.5" hard drive toaster for forensics work :(
This isn't the 90's/00's where you had to match graphics interfaces, FSB timing, RAM sockets/timing, modular vs cabled PSUs, set jumpers, configure components' master/slave relationships, run molex's/splitters, maximize board fans, clump case/button/etc connectors, terminate sockets, etc, etc.
* does my motherboard m.2 slot support PCIe or SATA m.2 SSD-s?
* on AMD motherboards: will my CPU work out of the box or do I need a loaner CPU to perform a BIOS update?
* using the wrong fan header on the motherboard for your AIO water cooler
* not setting the proper XMP profile for your RAM
Those are the ones that I could think of immediately.
Definitely SATA, most likely m.2 as well. They're not either/or.
More likely, you'll run into exhausting your PCIe lanes and might knock your GPU into 8x/4x mode or your additional SSD's into the dedicated SATA lanes.
> on AMD motherboards: will my CPU work out of the box or do I need a loaner CPU to perform a BIOS update?
Unless you fall into a very specific set of Motherboards from during the Zen -> Zen+ transition, the answer is no.
> using the wrong fan header on the motherboard for your AIO water cooler
Any header will still work, and it's not catastrophic anyways. Just change it if you got it wrong. Realistically, any modern motherboard will have the CPU fan header marked clearly, as opposed to the chassis headers.
> not setting the proper XMP profile for your RAM
The point of XMP is that you don't have to choose the profile. You just choose "XMP custom" (or however your motherboard manufacturer labels it) in the UEFI settings. If you don't, you'll get standard JEDEC RAM timings, which is hardly going to stop you.
I mean, your off the top of your head examples are all pretty easily solvable and probably wouldn't even be encountered unless you were specifically looking for them anyways. And if you don't configure them, most will Just Work (tm) at default configurations.
The weird thing is how pre-builts seem to tier the products at. You can get Pre-builts with good CPU/GPU combos but absurdly low RAM/Storage quantities.
They like to tier at 16GB RAM/500GB SSDs and then go up from there for hundreds of dollars without a change of the CPU/GPU and that really confuses me.
It's a shame there is little to no physical retail for this stuff anymore as it used to be easier to find a fire sale on a pre-built that needs to move because of how brick and mortar works.
That said, it truly is easy to do it yourself and that has its own satisfaction.
Teenager me had the knowledge and patience to build one and would have loved too, but didn't have the money at the time.
Adult me doesn't have the patience, nor the knowledge anymore, but has the money.
I'm also less interested in those huge, full of fancy glowing RGB lights, gaming rigs and more interested in something small, silent and discreet.
So, in so many words, I can't compare, but I'm fairly certain it would take me more time than is worth trying to come up and build a rig as slick as the Corsair One.