Loading times with large world

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I am working on a open world game, i have one 16km by 16km landscape that is split into 8x8km tiles, but stiched and world composition removed, as i want my game to be open world multiplayer

with just my map ect the load times is fast, but once i add procedural foliage the load times become forever…

i have a decent computer and will post specs at the bottom, this i without collision enabled, if i enable collision on only LOD0 and disable it on all other LOD’s (i think im doing that right?) then it becomes MUCH longer

right now on my system my world takes around 30 minutes to open in UE, with collision it takes 1+ hour…

and i just want to add it stalls on “initializing world”

(sry copy paste, too lazy to type)

Specs
Case: CoolerMaster Storm Trooper Full Tower
Monitor: ASUS ROG SWIFT PG278Q 1440p G-Sync 144hz + ASUS VG278HE 27" 144HZ
CPU: Intel i7-4790K 4.9GHZ 1.235v 67c MAXOC: 5.1 GHZ 1.36v 78c
Video Card: MSI GTX 980 Ti SEA HAWK 1536Mhz
Cooler: Corsair H110i AF140 Pull
Motherboard: Gigabyte Z97X-Gaming 5
Memory: Kingston HyperX Savage 32GB 2400Mhz 10-10-10-30-1T
Hard Drive: Samsung 840 Pro 256GB SSD, Sandisk Ultra II 960GB SSD, 2TB WD Black
Sound Card: Creative XFi F1tality Champion 7.1
Headphones: Audio-Technica ATH-M50x
Microphone: Audio-Technica AT2020
Mouse: Logitech G502
Mousepad: Tt Sports Conkor
Keyboard: Corsair K90 Mechanical Keyboard
Operating System: Windows 10 Pro x64
Power Supply: eVGA SuperNova 1300w G2

Had to delete my foilage and resimulate it… fixed.

Whats it like now? If you upgraded pc, please lwt us know wat the specs are