Well this is a great place to learn
Ok, your FSB is what's called "quad-pumped". So originally it was running at a "quad-pumped" speed of 1066MHz. You have to divide that by 4 to get the actual frequency of the FSB. 1066/4 = 266MHz. You have overclocked the FSB to 1333MHz. 1333/4 = 333MHz, which is the actual frequency of the FSB right now.
DDR and DDR2 memory are "double-data rate", so memory running at DDR2 800 is actually running at 800/2 = 400MHz. It was a marketing gimmick back when DDR was launched to compare slow SDRAM to the new fast DDR memory that transferred data both on the rise and fall of the signal. So DDR memory running at 200MHz would actually give twice the bandwidth as SDRAM running at 200MHz. They thus called it DDR 400 memory, because it was the equivalent of SDRAM running at 400MHz.
As I explained in my previous post, the 333/800 means if the actual FSB frequency is 333MHz (which it is as I just explained), then your memory will be running at DDR2 800 speeds. And as I just explained, DDR2 800 speeds means the memory is running at 400MHz. Now this does not "lock" your FSB at 333Mhz or the memory at 400MHz. It's just a weird way of saying that the computer is setting a relationship between the FSB and memory speed equal to 333/400 = 5/6. So for every 5MHz of FSB speed, it will set 6MHz of memory speed. In other words, you can now find your memory speed by taking the FSB speed and multiplying it by 6/5. So if you increase the FSB from 333MHz to 338MHz (a 5MHz increase), your RAM will go from 400MHz to 406MHz (a 6MHz increase) which would give you DDR2 812 speeds. Make sense?
As for the 1:1 ratio being best, that's true to a certain extent. You definitely want the RAM running at least as fast as the FSB or you will lose performance. You currently have the RAM running a little faster than the FSB, which is perfectly ok. As long as the RAM is running as fast as the FSB or faster, you're good to go.
As for damaging your RAM, the only real way to do that is if you overvolt it too much, so don't give it more than 1.9v and you're fine. However, if you increase the RAM speed too much, your system might not post due to instability. This doesn't hurt the RAM, but you'll have to reset the CMOS and start from scratch with your overclock if this happens. Since the RAM speed goes up as the FSB goes up, make sure you increase the FSB in small increments and stress test with Prime95 after an increase to check for stability.
Keep pushing that CPU further! CPU speed is the most important factor in a good overclock.Edited by durch - 12/24/08 at 5:45pm