New to RAM overclocking.. =I

[thedeathclox]

Hi there, I purchased an Asus P5Q SE motherboard, running the Intel P45 Chipset. Now, I have 4 modules of DDR2 Ram. Its, unfortunately frankensteined, but the speed is common on them; 667MHz, except for one which operates at 800MHz, but due to the others the speed is knocked down to 667. Is it possible for me to level them all at 800MHz stable? They're all going to have heat spreaders, I just ordered some. Also, the system should be well cooled. My current mix is going to be 2 Nanya modules, 1 Corsair Module, and 1 Unifosa module (800MHz). Also, that corsair module has memory timings of 4-4-4-12, whereas the others all run at 5-5-5-15. Can I ajust these to go down to 4-4-4-12 or am I S.O.L? Also, what are DRAM ratios? How do they work? Thanks in advance..!

 

[thedeathclox]

Nothing? =c