USB 3 PCI-E card doesn't show up at all in Win7 Device Manager about 1/3 of the time

In Windows 7 Pro SP1, HP S5730 Desktop, AMD Phenom II X2 511 Proc,  8gb ram.  PCI-E card: "ORICO PUV3-2O2I",

About 1/3 of the time when we reboot the computer, the VIA USB 3 ROOT HUB does not appear at all in the device manager.  (So there's no error message because there's no item). The only way to get it to appear is to reboot.

When it does appear, it is listed as "VIA USB 3 ROOT HUB", driver versions 5/29/2014, 6.1.7600.4701

The Orico driver download links leads to a via driver "VIA_XHCI_Driver_V4.70C_AP", I went to VIAs site and found the same driver, plus an older one from 2013, "VIA_XHCI_Driver_V4.40D_AP", but switching to that one made no difference.

I tried reseating the PCI-E card but so far no improvement.

When it is working, it works correctly at usb 3 speed. We normally  have an "AmazonBasics" USB-3 7 port hub plugged the USB 3 PCI-E card.
dgrrrAsked:
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nobusCommented:
can you test it in another slot?  maybe a bad contact somehow.
or update your drivers; best start with chipset :
http://support.hp.com/us-en/drivers/selfservice/HP-Pavilion-Slimline-s5000-Desktop-PC-series/5035352/model/5052496
rindiCommented:
If the other slot doesn't help, I'd take a look at the PC's PSU, it probably just can't deliver the wattage needed for your hardware.

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Danny ChildIT ManagerCommented:
Also see whether your BIOS has a "quick boot" option, and if so, turn it OFF.  This may give the card more time to be recognised by the system.

Do you also find it's found more or less often after a reboot compared to a cold start up?
LeeTutorretiredCommented:
I've requested that this question be deleted for the following reason:

Not enough information to confirm an answer.
dgrrrAuthor Commented:
Thanks gents - it was the power. More peripherals made it worse, fewer peripherals made it better.
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Windows 7

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