Nowadays I have some projects that require a bit more computation power than usual. So I had the nice opportunity to build a stationary computation horse. My current mindset is that laptops are not really that useful as something to do computations on from an investment perspective. It is much more cost-effective to have good mobile internet, a weak laptop with long battery-life and a stationary machine somewhere in the world into which you remotely login to for your heavy lifting. Another practical requirement for the laptop is that it is light and has a replaceable battery. I am a big fan of the ThinkPad X series. (The T430 or T530 will always have a special place in my heart. But alas it is too heavy for me now. Of course this makes them most suitable as a murder weapon if somebody insults your machine.)
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For GPU stuff I do use windows. To avoid the problematic stuff of dealing with re-installations of generic software I stick to a fixed motherboard. Your windows then becomes plug-and-play. I settled on a Asus Prime B550M-A which is actually a bit different from my old motherboard but generally plug-and-play will work on motherboards of the same family. Of course if Linux had better GPU support this wouldn't be anything to fuss about :3
AMD Ryzen 9 5950X is good enough for my applications (16-Core). The thermalRight is the only right cooler for your CPU :D Double fan will only set you back around 30 dollars. Great cooler for the price. I think a single fan is actually enough but I generally find that if you have 2 fans then they produce less noise than a single fan as the noise generation is not linear.
I was thinking about getting an A5000 GPU to match my CPU that but it seems a better deal to go for an A4500. An A6000 or greater is overkill and waste of research funds.
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Generic source (Higher is better)
A4500 sits quite close to A5000 in terms of performance and is relatively much cheaper (at least here in Japan). A4500 has 20GB which is a couple of GB greater than the applications I plan to use it for. RTX 3090 is also not too expensive but it is quite power hungry. I matched the 20GB of the A4500 with 32GB of generic RAM which is more than enough for my level of computations.
I was thinking about getting an open case but with all the undergrads visiting my office I went for a closed case to be on the safe side. Cheap Silverstone cases are a pretty good deal. I didn't notice that the fan for my power supply would have to be located at the bottom of my case. But I just keep my machine side ways.
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Don't judge my wires :3
The total amount spent was less than that the average prof over here spends on his/her Mac setup. :D
Cat tax