What is the standard accepted overclocking percentage increase that has been determined as safe; now that its better understood from years of geeks doing it. And that is to say without overheating the cpu as the main target here. Will be using Arctic Silver 5 on top of processors to heat sink, Note: Cooling will be by 2X-HD-120mm cooling fans and thermaltake cpu heat sinks in full size towers. Power supplies will be 350-420watt thermaltakes. Motherboards are ASUS and Intel. ASUS M266 Motherboards 266MhzFSB, Socket 7 362-1133/1333/1600/1800/XP2000. , Intel P3-P34X-133FSB Motherboards using Processors P3(Socket-370 & Slot1)733Mhz-866Mhz 2X933Mhz-1.0oGhz-1.26Ghz-1.4Ghz. Intel P4B- 266/400FSB Motherboards Processors P4(Socket-478)1.7Ghz/1.8Ghz 2.0Ghz, I will be using maximum matched ram per crucial recomendations, with max FSB in each aplication. PC 133, PC2100, PC 2700, PC3200, PC800RDRAM. Also can I go Max DDR 4000 for any of this or better yet DDRII 4200/5300/6400 on any of the P4 stuff. I am also building my first 800FSB once I get the hang of these builds using a ASUS P5GVMX Motherboard/P4 Prescot 3.62Ghz Processor/3Gb RamPC3200 and 64Bit 2005XP Pro Server Retail SP1 got off E-Bay supposedly never used. I am behind the times but am coming up to speed. I have Scott Mueller's Upgrading and Repairing PC's 16th Edition but haven't read it all yet. Someday I'll be able to buy new; and by then there will probably be a linkable 100X16core CPU with 100GbRAM and 1Teraflop HD, & 100"LCD LOL