It looks like !buildapc community isn’t super active so I apologize for posting here. Mods, let me know if I should post there instead.
I built my first PC when I was I think 10-11 years old. Built my next PC after that and then sort of moved toward pre-made HP/Dell/etc. My last PC’s mobo just gave out and I’m looking to replace the whole thing. I’ve read over the last few years that prefabs from HP/Dell/etc. have gone to shit and don’t really work like they used to. Since I’m looking to expand comfortably, I’ve been thinking of giving building my own again.
I remember when I was a young lad, that there were two big pain points when putting the rig together: motherboard alignment with the case (I shorted two mobos by having it touch the bare metal of the grounded case; not sure how that happened but it did) and CPU pin alignment so you don’t bend any pins when inserting into the socket.
Since it’s been several decades since my last build, what are some things I should be aware of? Things I should avoid?
For example, I only recently learned what M.2 SSD are. My desktop has (had) SATA 3.5" drives, only one of which is an SSD.
I’ll admit I am a bit overwhelmed by some of my choices. I’ve spent some time on pcpartpicker and feel very overwhelmed by some of the options. Most of my time is spent in code development (primarily containers and node). I am planning on installing Linux (Ubuntu, most likely) and I am hoping to tinker with some AI models, something I haven’t been able to do with my now broken desktop due to it’s age. For ML/AI, I know I’ll need some sort of GPU, knowing only that NVIDIA cards require closed-source drivers. While I fully support FOSS, I’m not a OSS purist and fully accept that using a closed source drivers for linux may not be avoidable. Happy to take recommendations on GPUs!
Since I also host a myriad of self hosted apps on my desktop, I know I’ll need to beef up my RAM (I usually go the max or at least plan for the max).
My main requirements:
- Intel i7 processor (I’ve tried i5s and they can’t keep up with what I code; I know i9s are the latest hotness but don’t think the price is worth it; I’ve also tried AMD processors before and had terrible luck. I’m willing to try them again but I’d need a GOOD recommendation)
- At least 3 SATA ports so that I can carry my drives over
- At least one M.2 port (I cannibalized a laptop I recycled recently and grabbed the 1TB M.2 card)
- On-board Ethernet/NIC (on-board wifi/bluetooth not required, but won’t complain if they have them)
- Support at least 32 GB of RAM
- GPU that can support some sort of ML/AI with DisplayPort (preferred)
Nice to haves:
- MoBo with front USB 3 ports but will accept USB 2 (C vs A doesn’t matter)
- On-board sound (I typically use headphones or bluetooth headset so I don’t need anything fancy. I mostly listen to music when I code and occasionally do video calls.)
I threw together this list: https://pcpartpicker.com/list/n6wVRK
It didn’t matter to me if it was in stock; just wanted a place to start. Advice is very much appreciated!
EDIT: WOW!! I am shocked and humbled by the great advice I’ve gotten here. And you’ve given me a boost in confidence in doing this myself. Thank you all and I’ll keep replying as I can.
Compared to those pain points building a modern PC should be a breeze. CPUs go in Zero Insertion Force sockets so as long as you remember to lift the little lever you won’t bend any pins. People don’t even wear static discharge wrist bands anymore (all though it couldn’t hurt) or worry about shorting things out. And power connectors only fit one way unlike the AT power connector.
Speaking of breeze your only pain point might be making sure you have enough air circulation for cooling all that gear.
I remember working on a PC back in my Geek Squad days that had a lever.
For air circulation, what should I be on the lookout for? Making sure I have clearances, of course, but should I buy more fan that I need?
Case usually have fans preinstalled that should be fine. Just pay attention to the direction, have tham all blow air front to back. There is usually an arrow indicating which way it moves air.
Run a benchmark after buiding the PC and check temperatures.
Don’t just look at temperatures though, look at clock speed too. 95c+ is normal for modern high end CPUs (AMD 7000 series actively try to run at that temp under full load). What you want to make sure is that it’s not throttling.
If this is a server and you don’t want your thermal paste to be toast in a year then I’d suggest lowering the maximum temperature in the bios if it lets you.
That and you need to decide how much positive or negative pressure you want in there as well. You could always do some calculations. Treat your case as an open control volume where mass can transfer across the boundaries. Then the sum of air going into and out of the case must equal the rate of change of air in the case. Assuming the volume of air in your case is constant, this term would be zero. So you can look at the rated volume flow rate for each fan (CFM - aka cubic foot per minute) and see if this summation is positive or negative. A positive value would mean “positive pressure” and a negative value “negative pressure”. The only problem is if the fans are not running at max RPM and/or the rated CFM value - which is the case if you have your fans plugged into the motherboard( regardless of whether you’re using PWM or 3 pin). In this case, you would have to calculate the volume flow rate of each individual fan as a function of the RPM. This may not be a linear function and would probably require taking some data and coming up with a regression for the data. This would be way harder to do.
tldr: add up the CFM going into the case, subtract the CFM leaving the case. If the value is positive you have “positive pressure”