Originally Posted by SAFX
It was my understanding that by installing DDR2-1000+mhz on a mobo that supports only up to DDR2-800, the memory would be clocked by to 800mhz, is that a correct assumption?
Wrong assumption, if you do go with 680i you can oc the cpu and memory separately unlinked. Meaning your cpu could be clocked to 3.6ghz assuming 10x multi 360fsb and memory clocked to 1000mhz. Do yourself a favor and stay far far away from the evga board regardless of all the bad advice your being given in this thread. You first thought about all the sata issues with that board was correct and is something that still isnt fixed. Both the asus 680i boards on the other hand seem to be the best available and with the new bios updates clock up to 500fsb.
I wouldnt recommend going 680i if your only going with one video card though. A 975x board would be the fastest clock for clock and with you getting a X6800 you wouldnt even hit the 450fsb max on most 975x boards.
The E6600 has the full 4 meg cache it doesn't need the high FSB speeds like the 6300 & 6400 due to x9 multiplier. The E6700 isnt worth the extra $200 for a x10 multiplier the X6800 isnt worth the extra $700 dollars for another BIOS feature( unlocked multiplier).
This isnt the whole picture. A 6600 is sufficient if your going with nothing but high end air cooling and a P965 mobo like a P5B Deluxe but if your using better cooling like water or phase the higher multi cpus come in handy. Especially if your dealing with a 975x board. With a X6800 and unlocked multi is alot more than just a "bios feature". Having the multi unlocked gives you an oppurtunity to get the best out of your cpu regardless of which board you choose to go with and thats simply not the case with the cpus that are locked upwards.
The one thing your skimping on is cooling. There is nothing special about a big typhoon or tuniq. If you really want an "ultimate" system you need to consider water cooling or phase change cooling. Thats the only way you'll be able to get the most out of your system and if you go with water you could also water cool your video card.