Originally Posted by cstkl1
You are confining yourself for no reason there. Unless you keep both at 4 clocks (which is simply their minimum time based upon burst lengths), there is no correlation to keep these the same for peace of mind.
PRECHARGE closes a page, tRTP sets the delay between the last read transaction and tRP. tWTR is simply the delay between a write transaction and a read. The two settings are not mutually related in any way that would require you to confine yourself to the rule you state.
Anyway, the rest of your dimlemma is simply a matter of taking your time and working out what's right for you - don't worry about what other people can or can't run. IO can depend on many things so one is best advised to tune themselves gradually if so inclined. One persons stable is another persons unstable too - I have heard of people running tRDRD at 4 over DDR3-2800 on Ln2, does not mean we can all do it. For 24/7 systems most people will find that stress tests will start failing past DDR3-2400 if the bus is loaded - both the DIMMs and memory controller will need more overvoltage than many are willing to run on their systems to go any higher even if it were possible. Plus, the performance change in everyday systems is too small for many people to worry about. The only place this stuff starts to matter a lot is Super Pi 32M.
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