|Many Gigabyte motherboards in their BIOS' offer a 'Memory Multiplier' which is probably your 2.66, 3.33, 4.0 settings. These choices vary depending on what the frequency your CPU is supposed to run at, for example, if you had a CPU with a naturally higher FSB you would be offered a different set of choices, specifically lower ones. You can try this and see if you can fool the BIOS into offering you a different set of choices on your memory multipliers: Set your frequency to 333 and your memory multiplier to the lowest (2.66) and your CPU multiplier to 9, then save changes and exit, but when it reboots, go directly back into set up rather than into Windows so the higher memory setting should not matter, and see if you are offered the 2.0 memory multiplier option now. If it is, then you are all set, if it does not, then you will either need to limit your OC so your memory does not increase beyond 800 (or whatever it's design limits are), or look into overclockable memory that can tolerate the higher rate. As far as the ratio is concerned, the ideal is 1:1 or 1:2 (many even dismiss this completely), but if you cannot achieve it, your machine will actually run very well at a ratio of 3:4, in fact I have run a machine OC'ed at that ratio with a similar issue and it ran very well. Later I swapped out the CPU for an E7500 that I got a decent buy on (Microcenter) and since that has a higher base FSB, the RAM speed issue was solved (it is only the 800MHz FSB CPU's that are as limited on the memory multipliers offered on the Gigabyte boards, the 1066FSB base CPU had batter options).|
Edit: Just also thought: you can use a Frequency of 300MHz and a CPU multiplier of 11 for 3.3GHz and that would give you 300x2.66=798MHz DDR2 RAM freq. and a 1200MHz FSB and keep you within your memory limits, increase your FSB, and that should be the same ratio you currently have. Many will object that it is not an ideal setting, but it is a workable setting, should give you a performance improvement, and is not really that 'bad'.
You have to be a little bit crazy to keep you from going insane.