Okay. I have an MSI 845 Ultra-ARU motherboard and I plan on getting a Northwood CPU. I would like to OC the CPU and get to a stable 133 MHz front side bus. At 133 the 1/4 divider kicks in and keeps the rest of my components in spec. I would like to get the 2.2 GHz chip, but at 133 MHz fsb it would be running at about 2.9 GHz. If I get the 2.0A chip, I can get to around 2.6 GHz with a 133 fsb. I have three case fans (front intake, rear exhaust, and side intake over the cpu), and a Thermaltake P4 Volcano 478 heatsink/fan with AS3 as the thermal compound. I also have two 256 MB Micron PC2400 DDR SDRAM. Would I be better off getting a 2.2, or 2.0 GHz Northwood CPU? Thanks.