Question Worse gaming performance UNLESS browser open

[goshagugl]

I have no idea why this is happening but it has been happening in every game I play (elden ring and BF1 recently).
Unless I have my firefox browser open on my 3rd monitor, my performance is completely [language redacted] (literally 30% of the usual FPS)
Just tested with BF1 and my fps went from ~120 with high CPU usage 95%+ across all 8 threads with browser open to super choppy 30-70fps with 100% usage across all cores with no browser open.
Any advice/ideas appreciated.

I have tried:
bios update
malware scan
windows updates
various games

P.S. played BF1 for a few days and had great performance, now for the last week it has been [language redacted] no matter what settings I change, bad input lag + 50% of expected frame rate. This issue is probably unrelated.



CPU: i7 9700k
CPU cooler: cooler master
Motherboard: TUF z390 plus gaming, BIOS ver 3006 12/10/21 (latest version)
Ram: 16gb corsair ddr4 @ 3000mhz
SSD/HDD: samsung ssd boot drive + seperate drive for games
GPU: rtx 4070
PSU: 650w gold rated, 1 yr old
OS: w10
Monitor: 140hz 1080p samsung, 240hz 1440p LG, 60hz 1080p samsung

 

[Lutfij]

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

RTX 4070
What GPU did you have prior to the RTX4070?