For example, my PC is currently boasting an AMD Ryzen 5 3600, 16GB of DDR4 Ram, and a Geforce GTX 1070ti. Should I be able to run a consistent 60fps? Or do I need to upgrade?
Can I even play PS2 games on RPCS3?
The minimum specs to get full speed in most games is Intel (Haswell) 4th Gen CPU, or AMD Ryzen CPU. I have a Ryzen 5 1600x, and every game I tried runs full speed, and more actually. Some games run 250-300fps if I turn the frame limiter off. It's a well optimized emulator. It actually runs faster than PCSX2 does.
Anyone with an AMD Ryzen 5 1600x CPU, equivalent or better should have no issues running RPCS3.
Every emulator I tried runs great on an AMD Ryzen CPU. So it's complete misinformation to suggest that emulation isn't good on AMD CPUs. The Intel CPUs are faster, if you want to uncap the frame rates for example, they're about 30% faster than AMD, but you still get full speed on emulators with AMD Ryzen chips. PCSX2 (PS2), Dolphin (GC/Wii), Cemu (Wii-U), RPCS3 (PS3), all run full speed on AMD Ryzen chips. On every game I played on those respective emulators. Played Xenoblade Chronicles X on Cemu last year, and it ran full speed on AMD Ryzen, even at 4k upscaled resolution, and the emulator probably runs faster now. Tales of Graces F, Tales of Xillia 1 & 2, and Demon's Souls and Dragon's Crown all ran full speed on RPCS3, although I had to make custom config files for some of those games to solve some minor issues, but they all ran at 4k upscaled for zero performance hit.... The tales games ran at 200fps+ in battles if I turned the frame limiter off....So yeah, these Ryzen chips are plenty good for emulation.