Newbie Needs Help please

Ok so I have OC my system a few times but not sure what I am really doing. I need to find the best settings for my system.

MB Gigabyte EP43-DS3
RAM 6 Gig PC2-6400 DDR2 (400)Mhz ?
BIOS V9 - MIT intelligent Tweaker
GTX260
E8500 CPU 3.16
OS Win7 Ultimate 64bit

Ok so 1 thing I am confused about is in BIOS the memory frequency shows two numbers in blue like this:

Memory frequency 800 800 I some times have had 800 1066

Now in CPU-Z my memory shows as PC2-6400 (400Mhz) - whats the numbers all mean? what is my memory frequency? what should the memory in BIOS say? How do I get this to be 1:1 or at least perfect for my system?

the other thing is I have changed the FSB from 333 to get my system up to 3.30 and 3.40 Mhz clock speed but have not adjusted and voltages as I am not sure I should. I found it runs fine with low temps at 3.30 but this increases the ram numbers and I don't know if it's a good thing or bad.

Right now I have it back at stock. Ram shows 800 1066 FSB 333

So please I would really appreciate any advice on settings here that will make my system fly better if possible oh and soon I will change the CPU to a Quad 9400 already ordered.

I use FSX alot so this is why I need to make it as good as I can.

Colin

You have DDR 800Mhz that is 400 DDR= 800MHz, set your dividers so you don't go over 400MHz when you overclock.

Welcome to the Forum! http://www.ocforums.com/showthread.php?t=491697

The "dividers" Wingman is referring to might be called "System Memory Multiplier" in the bios.
I couldn't find any info on the bios of that board so I'm assuming it might be the same or similiar to the p45.\

You can check by using cpu-z>memory tab>FSBRAM.
Look for the 1:1.
Later you can play with the dividers to increase performance.