OK, so basically the G.Skill HZ will run fine in my mobo, offer me speeds of 250Mhz and out perform the G.Skill ZX? Its only £3/$6 more expensive, so if its worth it, i'll definately get it.
about the timings tho, they are noticeably not as tight. the DDR500 is 3-4-4-8 whereas the DDR400 is 2-3-2-5. But I'll be able to run the DDR500 RAM at 250Mhz without having to mess with the CPU multipliers etc etc?
Thanks for clearing things up
EDIT* So if I used the RAM with my current OC, it would be running at 242Mhz with 3-4-4-8 timings?
How can I keep the CPU at say 2.2Ghz (i want to lower it from 2.42!) so the multiplier for the cpu is 220 but the RAM still runs at 250Mhz? Would this require a divider? :amazed: