Update:
Actually i can use my external HD hook up to my usb 2.0 slot. It seems like my Visiontek 2400HD is causing the bottleneck. Breakdown:
500GB external hd + USB 2.0 PCI card = No bottleneck
500GB external hd + USB 2.0 PCI card + 2400HD = bottleneck.
So i guess my question now is, what should i disable in device manager so my 2400hd is not being shared with my other devices, here are my irq's:
[IRQs]
IRQ Number Device
9 Microsoft ACPI-Compliant System
9 VIA USB Universal Host Controller
9 VIA USB Universal Host Controller
9 VIA USB Enhanced Host Controller
9 PCI standard PCI-to-PCI bridge
9 ATI Radeon HD 2400 Series
9 Intel(r) 82801AA USB Universal Host Controller
8 System CMOS/real time clock
13 Numeric data processor
12 Microsoft PS/2 Mouse
1 Standard 101/102-Key or Microsoft Natural PS/2 Keyboard
4 Communications Port (COM1)
14 Primary IDE Channel
15 Secondary IDE Channel
10 Intel(r) 82801AA SMBus Controller
IRQ's that is shared
[Conflicts/Sharing]
Resource Device
IRQ 9 Microsoft ACPI-Compliant System
IRQ 9 VIA USB Universal Host Controller
IRQ 9 VIA USB Universal Host Controller
IRQ 9 VIA USB Enhanced Host Controller
IRQ 9 PCI standard PCI-to-PCI bridge
IRQ 9 ATI Radeon HD 2400 Series
IRQ 9 Intel(r) 82801AA USB Universal Host Controller
Btw, are you sure i can disable onboard usb 1.1 in my bios, i don't know where i would look, if there is even a option.