So I'm planning on building a PC for the first time. I've spent about a week doing some low-level research and came up with this:
System Builder
My budget is around $1250 for the full thing, so this is near the top end of that after I add a monitor and keyboard (I already have a good mouse). I will mostly be using it for casual, moderate gaming.
I'm happy with the case, RAM, and hard drive and I'd like to keep these as is, but advice on everything else (CPU, video card, power supply, cooler, mobo - whether these are too much or good enough) would be nice. I'm not particular although I do prefer AMD based on what I've read so far.
I think what I selected is a bit overboard for that, so any ways to cut the cost without losing any noticeable performance would be appreciated. I also would like to know if I need any additional fans besides the two built into the case - a few searches suggest that those should be fine as long as I'm not planning to do anything super heavy, which as of now I'm not.
I'd also like to have an old MacBook hooked up to the monitor so I can use that for browsing and spreadsheets and what not, but I know how to do this and that should be fairly easy.
I do have a work computer as well which will be completely separate from this - my work is very computationally expensive, but that's all run on that machine or remotely on servers. The main reason for actually wanting to build one is so I don't have to game on my work machine anymore (which I probably shouldn't be doing anyway
).
If you can wait a month, motherboards based on the B450's successor, B550, will be for sale. The main difference is that it supports PCIe 4.0. The GPU that you picked out is only PCIe 3.0, but getting a PCIe 4.0 motherboard now will mean that, in a few years, if/when you upgrade your GPU, you'll get the most out of it. Also, unlike the B450, the B550 will support the upcoming Zen 3 CPUs, so that, years from now, if you want to replace your CPU, those will be an option to get a greater upgrade. If you can't wait a month, there are X570 motherboards that start at around $160 (or $50 more than the B450 one that you picked out) and already support PCIe 4.0 and will support Zen 3 CPUs. If I were you'd, I'd either wait a month and get a B550 motherboard or pay $50 extra for an X570 one now.
In fact, if you wait at least until next week, the Ryzen 3 3100 and 3300X will be released. See Commander Clueless' post above for a review of the 3300X (which also contains a link for their 3100 review). The 3100 benchmarks about the same as the 2600, yet will be only $100. That would save you at least $60. I would go with the 3300X, though, which is a good bit faster and only $120. That would still save you at least $40. The only downside is that both are only 4-core, but that makes no difference for gaming, which it sounds like this system will be almost exclusively for.
If I were you, I'd wait a month and get a spanking brand new B550 motherboard with a spanking brand new 3300X, but I understand if you're impatient to upgrade, especially with the lockdown providing so much free time.
Whatever you do, the CPU is going to come with a pretty decent cooler. If you have no intention of ever overclocking it (and note that the 3100 and 3300X don't even benefit from it in games), there's not a whole lot of reason to get a fancy cooler, IMO.
You said that you're happy with the case, which I respect, but, like alex suggested, you could shave off up to $100 on the case if you're willing to go more basic and give up the "premium" feel, the windows all around it, the front USB-C port and so on.
I have the $75 Corsair 200R and have been quite happy with it:
It's just a basic, but good quality case. Of course, I'm not the type who puts my case on display on my desk and wants windows for people see my hardware lit up by RGB lights, which seems all the rage these days. That's what the case that you picked out is for, so consider if that's really "you" before you spend extra on it. There's also the even cheaper 100R, which does have a window.
Oh, you asked about case fans. I think that two is plenty, personally. Whenever I've put more than that in a case, I've ended up disconnecting or removing them because I realized that I value a quieter case over one that's a degree or two cooler.