I will be building a new computer soon and I’m going to get a Q9450 and some 2x2gb G-Skill ddr2 1000, and I don’t plan to overclock at first. Anyways, I read somewhere that I can run the ram at 1000mhz and the cpu fsb at 1333mhz at a 2:3 ratio. Is this true? I am confused about this.
I dont know about bios ratios but the math doesnt work for 1000/1333 to equal 2/3. According to my calculator a 3/5 would work at 800/1333, if that setting exists. If you dont plan to overclock, get motherboard approved ram and let it run at default spd timings.
You don't need to close it AFAIK. Someone will resurect it in 6-8 months and a moderator will kill it after that.
About the ratios : It depends on the manufacturer.
Gigabyte uses : 2.0, 2.4, 3.0 and the likes. So 333 x 2.4 = 800 (DDR)
Asus uses : 2:3, 3:5, 5:8 and so on. So 333:400 = 5:6, 333:500 = 2:3
Some motherboards don't support this so read the manual. I'm not sure about the EVGA 750i FTW. You can always get RAM to run at a ratio of 1:1 if it doesn't work otherwise.
The ratios are FSB:RAM. For gigabyte and some others you need to use DDR frequencies. For ASUS you need physical frequencies (half of DDR). Your math doesn't add up because you turned them around.
3:5 works for 200:333 (or your 800:1333) on budget chips (E2xxx) with slower RAM (DDR2 667).
I've checked too. EVGA has a FSB:MEM Unlinked option so you can run any frequencies you want to.
Correct. Some ASUS boards do this too. I believe the ASUS Formula has this. Not sure about Gigabyte boards though. Also any one know if being able to run at unlinked is related to a perticuler chipset? Can all chipsets do this?