PC Massive FPS Drops/Lag

It could have someting to ddo with the matchmaking placing you in a server far away or the fact that the internet is twice as buzzy these days. But herre are a few tips that can help:

There is a possibility that choosing Repair after right clicking the game in Origin could fix this.

virus scan / adwcleaner, registry cleaner / ccleaner, HDD defragment / SSD trimm

use the SFC command utility to fix system files on Windows 10

driver cleaner procedure

perform a windows cleanup:  and select remove shader cash

How to set a factory overclocked graphics card to Nvidia reference clock speeds

Update the Nvidia drivers / AMD drivers && test different drivers

windows cleanboot

good luck!

Thank you for the advice. I'll give those options a try.  I did try repairing the game in Origin but that didn't work unfortunately. I experienced the same lag again (down to 1 or 2 fps) and I was unable to even pause & exit. I ended up clicking 'close window' to exit the game. Interestingly, I tried to launch the game again immediately from Origin and had the same issue as the game tried to open. Dropped to 2fps and the loading logo in the top right of the screen was lagging. Not sure if this helps but it interesting to know that the issue isn't necessarily limited to in-game. 

Again. just FYI, I've been playing on Ultra settings at 60 frames per second with no issues for over a year. The issue seems to have coincided with the last Origin update...  

Right so I've now tried the following without any success:

Repaired BF5 through Origin

Used the SFC utility 

Ran a full system scan on antivirus (no issues)

Added exceptions through the firewall for Origin

Unistalled Origin, used CC cleaner, re-installed Origin.

Removed cache for Origin manually as per EA's guidelines

Unistalled & Re-installed battlefield

Reduced graphics settings on BF5

Checked RAM health

Reverted to an older NVidia Driver that I was using before the issue started.

Adjusted Origin Application settings (turned off Cloud save & disabled Origin in-game) 

Nothing is working and the issue is happening so frequently that the game is unplayable... any further advice?

Thats quite a lot of 'tests'. 

besides asking in what region you play?

have you tested on low ping server?

what is the average ping in the game

have you tested on 16 player max server

are you playing with wireless?

have you updated network drivers / test other NIC is possible

try different game modes on differeent times on the day / avoid prim-time internet hours (18.00 /23.30)

also unplug as many as possible usb device / external devices

and reinstall / upgrade the intel chipset software driver

good luck!