How many internal usb 2.0's do i need?

[tdrauqram1305]

I'm not sure how many usb 2.0's i will need on my motherboard
specs:
MSI RTX 2070 ARMOR 8G
Lian Li PC-O11 Dynamic
WD Blue WD10EZEX
CORSAIR Vengeance RGB PRO - DDR4 - 16 GB: 2 x 8 GB
Corsair LL Series LL120 RGB (3x)
Intel Core i5 9600K
CORSAIR Hydro Series H115i RGB Platinum 280mm
CORSAIR RMx Series RM750x
Samsung 970 EVO MZ-V7E250BW

 

[Aeacus]

I'd say 2. One for Corsair AIO and another for Corsair Lighting Node Pro (for LL-series fans).

 

[tdrauqram1305]

I'd say 2. One for Corsair AIO and another for Corsair Lighting Node Pro (for LL-series fans).

what about the front panel io?

 

[Aeacus]

Your fancy case has 2x USB 3.0 Type A ports and 1x USB 3.0 Type C port on front I/O. No USB 2.0 ports though,
case specs: http://www.lian-li.com/pc-o11-dynamic/