Why don't you give a link to the exact memory you have cause your post is slightly confusing regarding DDR2 memory and what speed you memory you bought and want to run it at.
Typically you want to run your memory and cpu at a 1:1 ratio for stability unless you memory can't handle that type of overclock.
Alright well you've certainly bought a good set of ram. Unfortunately i think you might have been slightly misled before you bought it, i'm not sure, but in the end its great ram.
While typically you would have only need to buy DDR2-533, you bought ram twice that speed for DDR2-1066.
When i talk about DDR2-533 its speed is 266mhz but its effective speed is 533 because its Double Data Rate, DDR. Your E6600 runs on a fsb of 266mhz before any overclocking. At a 1:1 ratio with your effective ram speed would be DDR2-533.
The ideal situation would to run your cpu and memory at a 1:1 ratio with a fsb between 400-450 depending on what your chipset can handle. If your cpu overclock gets to high and the heat is too much drop the multiplier while keeping the fsb high while still maintaining a 1:1 ratio. Doing this will allow your memory to run faster while still keeping it at a 1:1 ratio and not overclocking the processor so that your cooling can't handle. Most likely you'll end up somewhere below your memory's rated speed of DDR2-1066, that would be DDR2-900 if you set your fsb to 450. So if this happens the next step would be to lower your timings. You'll be probably be able to get something like 4-4-5-12 or similiar.
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