I have an HP p7-1174 desk top, AMD quad, 8gb Ram, 1.5TB Seagate C HDD, AMD Radion 7850 Video card and I am trying to use a Kingwin USB 3 KH-302U3 external HDD for my back ups. This device works well with my 8.1 computer so the device functions. When I plug it in to the 1174 it only flashes rhythmically and the computer does not see it in "computer" or "disk manager". I have;
-Wiped the hard drive with Seagate disk wizard and re-formatted. No help.
-checked health of HDD. Normal
-Hooked up the HDD internally to do a back up and it worked well.
-UpDated USB 3 root hub. No help.
-Uninstalled USB 3 root hub and reinstalled. No help
-Purchased a USB 3 adapter, Vantec UGT-PC341, installed, device manager says it is working properly but the 1174 does not see the device by computer or manager.
-When the Kingwin is flashing the "device manager" page flashes off and on.
-Connected the Kingwin to Intel, win 8.1 and the device works fine.
-USB 2 works but backups take forever.
Please help my computer use its USB 3 and connect to the external Kingwin USB 3 device.