• The number after it is the data transfer rate. Simply divide it by 2 to get the maximum FSB speed for which the module is rated. Example: 800/2 = 400 MHz. Therefore, DDR2-800 can work on systems with a FSB of up to 400 MHz (anything more and you’re lucky).
^^^ This is in the sticky I posted. Your Memory is running at a stock 1.8V it will run as PC6400 until you up the voltage. Probably ~2.1V Then it will run at 1066 speed, but still identify as PC6400 as crosshairs stated.
Keep in mind that according to the above statement, the Ram FSB (you set in bios) is half of the rated FSB.
So currently you are running at 333 FSB. 333X2 is 666 (667).
This means that at stock Voltage you are underclocking your ram.
You can turn it up to 400 and it would run at 800.
If you turned up your voltages to 2.1 You could run your ram at 533, which would give you 1066.
However there are a few things to keep in mind.
As you raise your CPU fsb, you will marginally raise your ram FSB unless they are not locked together, which they usually are especially on budget boards.
So underclocking your ram is actually beneficial while your overclocking your CPU.
If you start your ram out at 667, and put your CPU at 333X9 it will give you 2997Ghz.
If you raise it to 340X9 it will be 3060 Ghz and your ram will go up to 340 = 680, and so on.
Once you see where your final CPU FSB is at you can adjust your ram accordingly.
Example: My CPU I can set it at 450X8 or 400X9 to achieve 3600 Ghz.
This means my ram can either bet set at 801/2 = 400 FSB (For X9 multi) or 901/2 = 450 for (X8 multi).
@400 FSB I can run my ram at about 1.9V and at 450 around 2.0V.
If I wanted to I could also run my CPU @ 514X7 = 3598 Ghz which would be 1028/2=514 but I have a dilema.
4GB of my ram is rated @PC8500 (1066) and 4GB of my ram is rated @PC5300 (667) "my old ram".
Now I could just run the new ram with only 4GB and be happy. My CPU can actually go up to 3.7 with only the 4GB, but....
I don't like the waste of ram. So I have to find a balance. In dual Channel my PC5300 can run 800 FSB and I can push it to 900 FSB.
Soooo, I can either run my CPU @400X8 or 450X9 for 3600. Keep in mind, running your FSB higher will affect everything in your system.
Running a higher FSB will run a scoch faster, but only something you might see on a benchmark, for real world applications, I would go
to the lower to save heat and wear and tear.
Capice? I hope I explained it well and don't get flamed from the real overclockers.