Vista - Is that overclocking?(the famous 1:1)

My cpu is Q6600.
I have read so many times about how good is the FSB : DRM 1:1 and that you gain extra speed and,and....
And i decide to give it a try.
My cpu is 9x266 and my ram 800mhz
So i changed the cpu to 6x400 and i set my ram to [2.00D]
I also set manualy the ram timings in the correct (Factory Stock) 5-5-5-15
I DIDEN'T change anything else,no voltage,no vcore,NOTHING.
Result: at last i get the famous 1:1 in cpuz (before was 2:3)and 5,9 in Windows Experience Index.(before was 5,6) so far so good.
But i dont want to overclock,i dont want to damage my hardware.
And i will like to know,are all the above normal changes or is everclocking and maybe it will damage my hardware?

Hi panais,

You have not overclocked. Your CPU runs at a frequency which is governed by the product of the FSB and the multiplier.

Calculations: 9 * 266 = 2394 MHz and 6 * 400 = 2400 MHz.

As you can see, your CPU is still running at the same clock frequency ~2.4 GHz.

What about the System Memory Multiplier? i choose the [2.00D] <-- is that the correct??

Setting the System Memory Multiplier to 2.0 will just keep your RAM at the rated speed of 800MHz as with DDR2, you half the rated speed, so 800 = 400MHz, then you have your multiplier to 2.0 so you're still just keeping the same 800MHz speed, so yea in essence is it correct having it at this setting.

If you set it higher, you'd increase the RAM speed, but then you'd also remove the 1:1 ratio.

My cpu is 9x266 and my ram 800mhz
So i changed the cpu to 6x400 and i set my ram to [2.00D]
I also set manualy the ram timings in the correct (Factory Stock) 5-5-5-15
(!!I DIDEN'T change anything else,no voltage,no vcore,NOTHING.!! is that ok?my pc works fine)

Yea that's right, you've got 1:1 ratio, but like what Dwarf has said, you've not really overclocked everything as your CPU is still the same speed. If you're happy with leaving them at the same speeds, but keeping 1:1 ratio, then that's fine to stay with.

What is the different between [2.00A] [2.00B] [2.00C] [2.00D]?

The letters correspond to what FSB speed you have.

2.00A = 266
2.00B = 333
2.00C = 200
2.00D = 400

So as you have an FSB of 400, you have 2.00D.

Ive tried to set the ram timings at 4-4-4-12 but i get BSOD.
Am i doing something wrong?Did i miss something?

You will most likely need to increase the voltage. Increase the voltage by 1 increment then try booting again. If it blue screens/crashes, the increase the voltage a bit more. It shouldn't need that much more voltage, though.

I use the timings of 5-4-4-12 2T with my overclocked RAM and just needed to increase the voltage by 1 increment and it works fine.