Here are my system SPecs. Power Supply ( 800 Watt -- XION Power Supply Quad SLI Ready ) Processor ( Intel Core 2 Duo Processor E8400 (2x 3.0GHz/6MB L2 Cache/1333FSB) ) Processor Cooling ( [=== Silent ===] Thermaltake V1 CPU Cooling Fan System Kit Silent & Overclocking Proof = Maximum cooling efficiency for quietness and performance ) Motherboard ( [SLI] MSI P7N SLI-FI Nvidia nForce 750i SLI Chipset w/7.1 Sound, Gb LAN, S-ATA Raid, USB 2.0, IEEE-1394, Three PCI-E MB ) Memory ( 4 GB [2 GB X2] DDR2-800 PC6400 Memory Module Corsair XMS2 Xtreme w/Heat Spreader ) I pretty much know HOW to do it. But I can't seem to get my CPU past around 3.4 I managed to get it there by raising the FSB clock to like 1400 or so. and my memory clock to like 830. (<<---- those numbers are not exact) Now my question is basically since my MOBO says it's max FSB is 1333, does that mean I can not or should not OC. I know the reason for OC is to push system to max, but does that mean ABOVE what the MOBO specs. are. I seen this CPUID screen shot that got his CPU to 4.5. We have same MOBO, same CPU, only this i am not sure about is RAM. I really don't quite understand the FSB/ram ratio. There is not an option in my Bios thats will allow me to change that. My default ratio is (according to CPUID) is FSB//DRAM === 5/6 with timings 5-5-5-18-22-2t. As I adjust FSB clock in bios the BIOS the ratio will change, but I am not sure exactly which settings affect the ratio. Is it the timings,? If so which # do they affect dram or FSB, and so forth. I know there is alot of ? here, and any ? would be great. Here is the ?Shot of that CPUID at 4.5 . Thank again.