Re: Best used desktop to run Sims 3?
@MAWriterGirl This is a pretty decent time to find a good used computer considering how much powerful new hardware has hit the market recently, so hopefully you'll be able to find something within your budget. If you have a friend who plays and is considering upgrading, they might sell you their old computer, or most of it, for cheap, leaving you to only buy one or two components that they're putting into a new build. If you buy from somewhere like Craigslist or Facebook Marketplace, I'd suggest getting some basic diagnostics or running them yourself before handing over the money. Let me know if you'd like some suggestions for what to run.
For the hardware itself, the most critical component is the graphics card. Any Nvidia GPU 10-series or newer that ends in 50 or higher (1050, 1070, 1650, 2060, etc) will be able to run the game on ultra graphics settings, as would an AMD RX 570 or 580 or anything in the 5000-series. For older cards, I'd look for something one level higher, e.g. GTX 960 or RX 380. The second-to-last digit is the indicator of the relative strength within the generation; each generation is of course somewhat faster than the previous one. And especially with older cards, you'll want to find out whether the unit is overheating, for example a fan might be broken or the thermal paste dried out.
For the processor, any Intel i5 or i7 6th-gen or later (i5-6400, i7-7700K, etc), or an i3 10th-gen or later (e.g. i3-10100), would definitely be good enough, as would a Ryzen 5 or 7 2000-series (R5 2600, R7 3700X) or later or an R3 5000-series. Here again, it's worth testing for overheating, but it's also an easy fix to remove the CPU cooler, apply new thermal paste ($10 or less per tube), and remount the cooler.
RAM is easy: get at least 8 GB. 16 is nice but not necessary, and it's a corner you can cut if this is just about Sims 3—the game can only use ~3.7 GB itself, Windows uses about 2, and you can avoid heavy multitasking while you play.
For storage, an SSD is a significant quality of life upgrade, but it's not absolutely critical. Load times will be much longer with an HDD, but the game will run the same once it's loaded. So you could get a system with an HDD now and upgrade it later. If you do absolutely want an SSD, keep in mind that it'll need to be at least 256 GB to fit Windows, Sims 3, and your user content, and even then, you'll need to keep an eye on free space. 500 GB would be better, but that could also drive the price up; older systems often don't have an SSD, or have a 128 GB drive just for Windows, because they were quite expensive until a few years ago.
The version of Windows doesn't matter to Sims 3, but Microsoft is only supporting 10 and 11. If you don't care about that, for example maybe the computer will mostly stay offline, a Windows 7 computer would be fine.
If you have questions about a particular system or component, just list it and I'll have a look.