USB splitter for front i/o case USB'S

[lgoodwn12]

I have an ASUS ROG STRIX Z370-H GAMING LGA1151 motherboard, a Corsair h100i v2 and Rosewill Nighthawk 117. Well my MOBO only has 2 USB 2.0 & a serial port connector (10-1 COM) headers on it and my case has 4 USB 2.0 on the front i/o with 2 cords that plug into the MOBO. My h100i also has a USB cord that needs to be plugged in. Can I plug one of the USB cords either from the h100i or the front i/o plugs into the COM header on the MOBO? Or is there a splitter that I can plug both of front i/o USB plugs from my case into one USB 2.0 header on the MOBO?

 

[das_stig]

I like these, keeps things tidy.

https://www.amazon.co.uk/NZXT-AC-IUSBH-M1-Internal-Connectors-External/dp/B01IFGFTJ2

 

[lgoodwn12]

That's not exactly what I'm looking for, what I'm trying to find a splitter 2 to 1 USB to plug into from my front i/o USB 2.0 to MOBO USB 2.0 header.
my corsair link is plugged into one of the USB headers and one of my front i/o case USB 2.0 is plugged into the other.

 

[BFG-9000]

No USB splitter can work without a hub chip. das_stig pointed out one way to get more motherboard headers, using an internal hub. Another is to use a PCI or PCIe to USB 2.0 expansion card with headers, but nothing attached to those ports would be bootable.

Nobody makes a COM port to USB adapter, because its 115kBit/s is more than 4000x slower than USB 2.0 so what use would that be, besides being exactly what you are looking for?

I suspect most people would just tape over one of the 4 front ports and use its header for the h100i. 3 front ports should be plenty, and there's no reason for the Corsair to take up the entire header when it only uses half (each motherboard header runs two USB ports). Alternately, the Corsair uses a standard mini-USB connector so there's nothing stopping you from running a regular USB-A to mini-USB cable from a rear port outside the case through a slotcover to the h100i inside.