shadetree

OK, My theory was correct with Win 7 and the USB drivers for the ATI SB400 chipset. I left them disabled in device manager. Then successfully installed a StarTeck PCIUSB7 card with VIA 2.2 controllers, it has 4 exterior USB-A ports and a interior USB-A port and USB double pin header totaling 7 ports. I wanted this card because of the controller and the double pin header. Then I added a NZXT IUO1 internal USB expansion board feeding it from the StarTeck’s USB double pin header and a 5v power insert from the PSU with the included cables. It adds three double pin headers and two USB-A ports. Now I was able to add my card reader and the other 3 front USB ports with 1 header pair left over. The two remaining USB-A ports I added my Bluetooth dongle on one of them. At idle the CPU is 0/3 % and a very noticeable increase in performance now that I didn’t ever know I had after installing Win7. I included some screen shots after the install. Thanks again for this post and I hope some will benefit.

Booting Win7 the USB disabled in device manager CPU 0&1 0-3% at idle. USB enabled CPU 0 is 15ish % and 1 is always 100% at idle. To test this theory, I will try a Win7 supported chipset PCI 4 ? port USB adapter with 4 ? pin headers, to replace the MOBO's. If this is a solution it would help others too. I will post back the results.

Thank you very much for this tutorial Andre I have a HP Pavilion a1267c MS-7184 Mainboard with now unsupported ATISB400 chipset, no BIOS update past 3.47. The USBPORT.SYS was maxing one of my AthlonX2 4800+ cores after installing Windows 7 Pro. It didn't slow things down much but the CPU fan was at mid rpm all the time. I had to disable the USB's before things went bask to normal. I am triple booting XP, Vista and 7 with no issues with the other OS's and thinking I will use a add in USB card and continue to test 7. Posting this....I just realized that I will not be using any of the MOBO onboard devices now. My HD GPU, HD Audio, GB Net and now USB are all add in cards. Again Thanks