Oculus Rift - Multiple USB Controllers

Folks,

I'm thinking about adding a USB PCIe card with separate controllers for each port to my next DS machine. Is that a good idea?

I want a moderately powerful system for general gaming and Oculus Rift. My eight year old DS i7-920 gives spotty performance, and in particular I have trouble with USB.

With three Rift sensors and the headset, I can't plug them all into one USB controller and get them to work. So what I want is a rig with at least two separate controllers for USB 3.0 ports, and I need a total of 6 ports; 4 for the Rift, one for my kb/mouse, and one for miscellaneous peripherals.

I also want a quiet rig, so here's what I came up with so far. Thanks for any advice on USB for a Rift machine.

Specifications:
Chassis Model: Corsair Carbide Quiet 600Q
Exterior Finish: - Standard Factory Finish
Trim Accents: - Standard Factory Finish
Processor: Intel Core i5-8600K (6-Core) 3.60GHz <br><strong></strong>
Motherboard: ASUS PRIME Z370-P (Intel Z370 Chipset) (Up to 2x PCI-E Devices) (No SLI Support)
System Memory: 16GB DDR4 3200MHz Digital Storm Performance Series
Power Supply: 750W EVGA SuperNOVA (750 G) (Fully Modular)
Expansion Bay: - No Thanks
Optical Drive: DVD-R/RW/CD-R/RW (DVD Writer 24x / CD-Writer 48x) (Internal)
Storage Set 1: 1x SSD (512GB Samsung 850 PRO)
Storage Set 2: 1x Storage (2TB Seagate / Toshiba)
Storage Set 3: - No Thanks
RAID Config: - No Thanks
RAID Card: - No Thanks
Internet Access: High Speed Network Port (Supports High-Speed Cable / DSL / Network Connections)
Graphics Card(s): 1x GeForce GTX 1080 8GB (Performance Edition) (VR Ready) <br><strong></strong>
Sound Card: Integrated Motherboard Audio
HPC Processor: - No Thanks
Extreme Cooling: H20: Stage 2: Corsair H115i - 280mm Liquid CPU Cooler (Fully Sealed + No Maintenance)
HydroLux Tubing Style: - Not Applicable, I do not have a custom HydroLux liquid cooling system selected
HydroLux Fluid Color: - Not Applicable, I do not have a custom HydroLux liquid cooling system selected
Cable Management: Premium Cable Management (Strategically Routed & Organized for Airflow)
Chassis Fans: Standard Factory Chassis Fans
Internal Lighting: - No Thanks
Airflow Control: Digital Storm Thermal Management Control Board & Software
Chassis Mods: - No Thanks
Noise Reduction: Noise Suppression Package Stage 1 (Optimized Airflow & Fan Speeds Only)
LaserMark: - No Thanks
Boost Processor: Stage 1: Overclock CPU - Up to 4.7GHz on All CPU Cores
Boost Graphics Card(s): Yes, Overclock the video card(s) as much as possible with complete stability
Boost OS: Yes, Disable and tweak all of the non-crucial services on the operating system <br><strong></strong>
Windows OS: Microsoft Windows 10 Home (64-Bit Edition)
Recovery Tools: Factory Reset Feature + Windows Installation CD (Partition up to 50GB of Storage)
Virus Protection: Windows Defender Antivirus (Built-in to Windows 10)
Office: - No Thanks
Game: - No Thanks
Display: - No Thanks
Surge Shield: - No Thanks
Speakers: - No Thanks
Keyboard: - No Thanks
Mouse: - No Thanks
Branded Gear: - No Thanks
Priority Build: - No Thanks, Ship Within 15-20 Business Days After Order Is Successfully Processed
Warranty: Life-time Expert Care with 3 Year Limited Warranty (3 Year Labor & 1 Year Part Replacement)