How to overclock hypertransport?

My system:

AMD Phenom II X4 940 Deneb Black Edition @3.5 Ghz(so far stable as hell)
GIGABYTE MA790GP-DS4H
CORSAIR DOMINATOR 4GB (2 x 2GB) DDR2 1066 (PC2 8500)
Sunbeam CR-CCTF 120mm "Core Contact Freezer" CPU Cooler
WINDOWS VISTA HOME PREMIUM 64 BIT

My problem:

can't get my Hyper Transport to run above the default/stock 1.8 Ghz(even tho my mobo supports up to 2.6)

MY exacT TO THE T BIOS SETTINGS:

HT Link Frequency = AUTO (setting this to 2.0 Ghz does NOT allow me to boot, however lowering it, does lower it)
EPP Mode = Auto
EPP Voltage Control = By EPP (previous 2 lines involving EPP = only way I can get my mem to clock @ 1066 Mhz and proper timings)
CPU Clock Ratio = x17.5
CPU Northbridge Freq = Auto (changing this multiplier alone does nothing)
CPU Host Clock Control = Auto
X CPU Frequency (Mhz) = 200 (default, and can only change this by changing previous line to manual, I have yet to touch this ever)
PCIE Clock (Mhz) = Auto
VGA Core Clock Control = Disabled (I have a nvidia XFX 9800 GT video card)
X VGA Core Clock (Mhz) = 700 (I have a nvidia XFX 9800 GT video card)
Set Memory Clock = Auto (Changing this to manual turns EPP OFF and causes memory to time wrong)
X Memory Clock = x5.33 1066 Mhz
----DRAM CONFIGURATION PRESS ENTER---- (It's set to auto w/ EPP)
System Voltage Control = Manual
Southbridge Volt Control = Normal
Sideport Mem Volt Control = Normal
Northbridge Volt Control = Normal
DDR 2 Volt Control = Normal(Pretty sure EPP sets this to the necessary 2.1 Volts to run 1066, but not 100% sure)
CPU NB VID Volt Control = Normal(I have Nvidia XFX 9800 GT)
CPU Volt = +.05 to 1.40V (Default 1.35V)

what EXACTLY do i need to change to increase my HTT

I have the 940 and a Giga-Byte 790X-udp4....I just set the multiplier (BOTH for the HT and northbridge) to 10x...

´cause I believe that HT speed can´t be faster than NB´s...
(If I´m wrong...let me know!.. jeje)

About performance.... I´m a graphic Designer....and now I can see a slightly bump in performance when switching between aplications....