Tbh, I'm super happy with the performance I'm getting. I did dig through my bios and found an old OC to 4.7 GHz that got me a few extra FPS on the low side.
I'm playing on my TV right now. My monitors are also over a decade old. I couldn't run faster than 60 FPS right now even if I wanted to lol but I appreciate the thought.
But aside from ray tracing being off, I'm running 1080p at ultra settings perfectly fine. I'm just super stoked my ancient CPU can still run newer/more intense titles. It's like being around in 2010 using a CPU from 1999. If you were using a Celeron that went in a slot, you probably weren't running Windows 7, let alone Crysis lol