FPS Drops While Recording

[Storiel000]

Hello. I recently tried to record a pretty old game, however my FPS dropped a lot upon starting the recording.

My Specs Are:
AMD Ryzen 5 1600
NVIDIA GeForce GTX 640
16gb RAM
Windows 10 Pro 64-Bit

Also, here's my Log File: https://obsproject.com/logs/X1oPE43muS33uq4U