AMD Ryzen is apparently the thing to go for, for budget gaming PCs these days.
https://en.wikipedia.org/wiki/RyzenHere's a recent video about memory performance on the Ryzens
https://www.youtube.com/watch?v=iHJ16hD4yskNote that frame rates on games don't really jump all that much between DDR4-2133 and DDR4-3200 memory, and over that speed, further increases don't seem cost-effective.
Ryzen comes in ranges of Ryzen-3, Ryzen-5, Ryzen-7, and Ryzen-9, similar to Intel i3, i5, i7, i9 in pricing.
You probably want a Ryzen 3 if your CPU budget is about $100 or a Ryzen 5 if your CPU budget is ~ $200
Ryzen 3 3200G = $91 on
Amazon US, 3.6 GHz, DDR4-2933
Benchmark = 7773Ryzen 5 3400G = $170 on
Amazon US, 3.7 GHz, DDR4-2933
Benchmark = 9948Ryzen 5 3600 = $175 on
Amazon US, 3.6 GHz, DDR4-3200
Benchmark = 14792Ryzen 5 3600X = $210 on
Amazon US, 3.8 GHz,
Benchmark = 20493* however the 3600X is 95 Watts, the others are all 65 Watts, so it's a power-hog.
After that, Ryzen 7's start at $300, so out of budget range.
Personally, I'd go for the Ryzen 5 3600.
The next is the motherboard. There are 4 main AM4 chipsets to consider:
B450 - basic motherboard, previous iteration
X470 - more comprehensive motherboard, previous iteration
B550 - basic motherboard, current iteration
X570 - more comprehensive motherboard, current iteration
You can get a B450 motherboard for $100. Here's a convenient video where a guy just happens to be trying to install a Ryzen 5 3600 on various old motherboards:
https://www.youtube.com/watch?v=WHdeyAuQCtMTurns out you probably have to do a bios update to get one of these suckers working with the current Ryzen processors. Some boards support bios flashback (meaning, flash from USB without needing a working processor). Here is a convenient list of some boards for this processor:
https://graphicscardhub.com/bios-flashback-motherboard/So, I'd probably go for this motherboard
https://www.msi.com/Motherboard/B450-GAMING-PLUS-MAX ... about $100 on Amazon.
If you don't mind having to flash the bios on the board then that saves about $200 on the price. For the low-end Ryzens 3/5, having the latest board doesn't seem cost-effective since the memory is going to be slow anyway.
And a 32 GB DDR4 kit (2 sticks) ... $150. Which conveniently leaves two slots open to expand to 64 GB later, since that B450 motherboard happens to have 4 memory slots, for a nice upgrade down the track.
So that's about $450 for processor, board and RAM so far. Which if you were going for the $1000 total on a whole box would seem about right.