I've just been into my BIOS and noticed the above BIOS settings I provided to be slightly erroneous.

Here's them again with the slight fix included:

CPU Ratio - 9
FSB Freq - 450

Effective CPU clock speed = 4.05GHz.

RAM/MCH related settings (RAM timings as 5-5-5-18):

AI Overclock Tuner - Manual
FSB Strap to NB - Auto
DRAM Freq - 1199MHz
DRAM CLK Skew A1 - Delay 50ns
DRAM CLK Skew A2 - Delay 50ns
DRAM CLK Skew B1 - Delay 50ns
DRAM CLK Skew B2 - Delay 50ns
DRAM Timing Control - Manual
Performance Level - 7
DRAM Static Read Control - Disabled
DRAM Read Training - Disabled
MEM OC Charger - Enabled
Ai Clock Twister - Strong
NB Voltage - 1.35175V
CPU Clock Skew - 100ns
NB Clock Skew - 100ns