Question Having horrible unplayable fps drops whilst in the battle bus and after jumping out in fortnite on a good pc

[yxx]

My fps drops to around 10 averaging around 20 when jumping out of the fortnite battle bus. I have tried everything including running benchmarks,reinstalling fortnite,resetting my pc
i had the same issue and upgraded my pc from i3-7100+1050 ti to i5-8500+rtx 2060
after a while after entering the game my fps becomes playable and normal
this has made the game unplayable for me
my specs are
Corsair VS450 PSU
i5-8500
asus b360m-A
Galax rtx 2060
8 gb hyper X fury 2400mhz

 

[rgd1101]

1 stick or 2 stick ram?
check ram usage?
ssd or hdd?
test with a better quality psu?