GPU performance issue

I have performance issues with my RHEL 8 desktop when I used the latest nvidia driver for RTX 2000 A. I also tried a P series P620 to find the same issue with latest driver. Is this a known issue due to power distribution? Is there a work around to utilize this new RTX card with my Linux RHEL 8 kernel (precisely 8.4). Look forward to your expert comments.

Further my CPU is core-i9 series. However, I don’t have the same issue with P600 series with core-i7 series CPUs