Reddit mentions of StarTech.com 4-Port PCI Express SuperSpeed USB 3.0 Controller Card with UASP - USB 3.0 Expansion Card with SATA Power (PEXUSB3S4V)

> Depending on your computer, you may have to upgrade your motherboard

That's incredibly unlikely. For a start, if you have a CPU fast enough to handle VR then you have at least PCI-E 2 and almost certainly PCI-E 3. Given that, you only need a spare PCI 1x slot and you can add this card for $46 to give you 4 more USB 3 ports and 500MB/s (4Gb/s) of bandwidth with PCI-E 2, double that with PCI-E 3. More than enough.

If you have a PCI 4x slot free then you can get this monster card which also has 4 USB 3 ports on it, except, they are all on individual USB controllers that don't share bandwidth with each other, and a max 2000MB/s (16Gb/s) (again, double for PCI-E 3) of throughput, so you could connect all 3 cameras to just this card and it would function just fine.

Oculus recommends the $80 Startech with 4 USB controllers as the ultimate offering.

• 4 Port PCI Express (PCIe) SuperSpeed USB 3.0 Card Adapter w/ 4 Dedicated 5Gbps Channels - UASP - SATA / LP4 Power https://www.amazon.com/dp/B00HJZEA2S/ref=cm_sw_r_cp_apa_e2EIAbGF5PMKH
  
  However, the Startech single usb controller card (similar to the inateck) seems to also work, and is only $30-$40. While Oculus doesnt state the lesser Starteck card is compatible, the reviews say otherwise
  
  
• StarTech.com 4-Port PCI Express SuperSpeed USB 3.0 Controller Card Adapter with SATA Power PEXUSB3S4V https://www.amazon.com/dp/B009AT5SVS/ref=cm_sw_r_cp_apa_D3EIAbV1KZXJ9
  
  

It's the same system I talked the SO into getting last year while bundle prices were low so she'd have a 'turnkey vr' rig.

Protip 1 - This 4 port PCIe 1x card drops right in and helps make up for the lack of fast USB ports on the system - https://www.amazon.com/gp/product/B009AT5SVS/

Protip 2 - You have three SATA ports on the motherboard. You can disconnect the CD-ROM, drop in two 3tb (or larger) HDD's to make a decent mirror and zip-tie a SSD on top the drive bay (see photo). There are enough free power leads off the stock PSU to make this happen.

https://imgur.com/a/95hsZ

I installed the SSD first for her, mirrored the OS off the stock 1TB HDD onto the SSD, pulled the 1TB, dropped in two 3TBs and built a mirror so her rig could double as a decent Plex/Steam server.

For the price it's not a bad little rig.

The usb expansions card you use needs to have a Fresco Logic FL1100EX chipset on it. I'm not seeing anything about that on the product description page.

This expansion card costs more , but does work well. If you get this one make sure to not use the drivers that come with it, but rather generic Windows drivers.

Just to follow up with this, I did get it working with this USB add-in card. It has a Renesas controller and I think the ThinkServer does too, so pretty sure it will work.

I had to apply an update to ESXi and manually start the xHCI module, as described in this article:

http://www.v-front.de/2014/11/vmware-silently-adds-native-usb-30.html

Thanks, I'll check out the graphs tomorrow. When I tried USB 3.0 on this thing, instead of 30-40MB/s when going from one disk to another in the enclosure like I'm getting with eSATA, it was like, 15-20MB/s on a large file copy. Is my StarTech PEXUSB3S4V shit for this thing or something maybe? It worked fine when these were in their original enclosures.

This is what I’m using. 4 Port PCI Express PCIe SuperSpeed USB 3.0 Controller Card Adapter with UASP - SATA Power - USB 3 PCIe Card https://www.amazon.com/dp/B009AT5SVS/ref=cm_sw_r_cp_api_pXaJBbD648G63 . It has a power connection but it isn’t hooked up. I am using it in a white box for a windows vm. My r510 II has 2 internal 2.5” drives. You always use one of those cables to power it if needed.

StarTech.com 4-Port PCI Express SuperSpeed USB 3.0 Controller Card Adapter with SATA Power PEXUSB3S4V https://www.amazon.com/dp/B009AT5SVS/ref=cm_sw_r_cp_apa_-veaAbC514HMN