It is the CPU not any operating system. That cpu and platform, it is a bit slow for certain modern games/engines. Especially if its either the first FX generation (8150, etc) or anything under the 8 core ones. The IPC on any ryzen 5000 cpu is almost 3 times more IPC than an FX. Another variable is your GPU is way faster than what the CPU can process and it will bottleneck on any FX platform and might be using 50-75% of what the GPU can deliver. So it might be running like if it was a 6600 or slower even though the GPU is way more powerful. Those CPU make great home servers nowadays.

Guide: https://archive.org/details/manualsbase-id-78410/page/12/mode/2up

If you can’t upgrade to something newer you might want to check the FX guide that used to be on the AMD website (provided the link above) that tells you how to overclock the CPU through the NB but don’t do it to overclock the CPU but just the NB and then underclock and undervolt everything near or the same as stock. This will make the CPU open up and run way better. Most of the times the NB might come at 2200 if Im not mistaken you can overclock that to 2400.

• You will need to raise the voltage (believe its NB) for that which I forgot the name but is in the guide.
• Be aware some motherboards won’t post when you do this if the board has weak VRMs or are cheaper boards. The chipset 990 or 970 has nothing to do with the construction and quality of the motherboard.
• If your ram is 1866mhz you can lower it to 1600mhz then raise the NB until you can see the RAM go up to something close to 1866mhz. If your ram is 1600mhz then lower it to the previous speed in the bios and then raise to get to 1600. Since you have 4 sticks of RAM that stresses the Memory Controller on the CPU a bit so if your motherboard is high end it might let you get to 1866 with 4 sticks and might even let you get to 2133mhz.
• Since you provided no details on what you have I can’t speculate much.
• Once you raise the NB everything will go up in the clock. So now you have to lower the cpu clock to the closest stock clock. Same with HT link and other clocks lower them to the nearest to stock.
• Also if you can match the HT with the NB at 2400 that will also make the system spend less power and be smoother.

IF nothing posts when you do this you need to reset your bios through the pins close to the CMOS battery (either using jumper pins or with a metal screwdriver). In that case its best to leave the NB at 2200mhz and lower the HTlink to 2200mhz. Some motherboards if they are higher end it will allow you to go to 2600 in the NB and HT but most wont allow that. Cheaper boards wont allow you to go to 2400mhz and will stay in 2200 you can lower the HT to 2400 or 2200 to make it run less stuttery.

This is all by my experience, but my advice is to read the guide and understand a bit more of what you can do. Don’t trust anything I say without reading the AMD guide first and deciding what to do because I haven’t worked on the platform in a while and may be mixing the NB and HT. But the one you should raise that I remember is the one that default is at 2200mhz. The other will be at 2600mhz unless the board is not too powerfull both might be at 2200mhz. At least with that as a reference you might be able to squeeze a bit more from that platform.

I apologize I didn’t write all of this in an ordered way.