I don't believe I need a disclaimer to discern what is an anecdotal observation (the 1425Mhz claim - seen from years of being here, this limit seems common regardless of voltage on generic spec kits) that at least helps give him an idea of how far he will go or why he does not go far IF he does not go far (and this is significant because he was planning as instructed to do a direct jump to 1600mhz without any in-between testing), taking into account a common sense observation (binning practices on all generic kits - esp. with 4GB DIMMs/higher density ICs). Better AN idea than NO idea.
Does that mean if i have oced cpu i must ram set to 667mhz because now i have oced amd x2 555 black edition to 4GHZ... Hope that somone can help me ..
If you have an overclocked bus clock (i.e. 240Mhz vs 200Mhz - it is common to be overclocking the bus clock if you do not have an unlocked processor) then setting the "1600Mhz" (it might be labelled that way, or the BIOS might've been smarter to label it as "x8" like 1333Mhz is "x6.66") might give you a higher speed than anticipated and unstable results.