UPDATE: deciphering cpu-z for c2d overclocking

[slag]

Read this on xtremesystems.org

"Originally Posted by jetjaguar
i changed the default to 333

but at 450fsb ... 667 makes my ram run at 4:5 or 5:4 wutever it is .. which makes it run at 1160 when im at 450 .. so i kept it at 533 which runs the ram at 1:1 which would be ddr2 900

Try to use IDCC to check the memory speed. Because I remember I read somewhere in this thread that CPUZ won't report the correct fsb:mem ratio when the board is in 1333 strap."

I'm using cpuz 1.38

First screen shows my bus speed at 354.8 mhz. This is not my memory bus speed, right?

The memory tab shows my RAM frequency @ 443.4 mhz. My core speed is 3192.


mem

Whats a good program to use for measuring correct voltages, etc with the Bad Axe 2 motherboard?

 

[Tempered81]

i would also like to know a good program for this.

 

[Alone]

First screen is for your processor (cpu), that's your FSB (front side bus).

The second one is for your memory (RAM) which is 443. Remember, if you have ram that says 800MHz, it operates at 400MHz. So, technically speaking, your ram is running at ~887(443.4 * 2).

 

[n7]

Unless you have very good RAM, you should set the RAM ratio to 1:1, instead of 4:5.

Then see how far you can get with that CPU.

Once it's hit its max, then you can mess with RAM ratios/timings etc.

 

[slag]

cpuz is misreporting that, or the chart @ CALC is wrong. I have my reference frequency set at 333 and memory frequency set at 667 which should be a 1:1 ratio @ 1333 strap.

However, my memory speed should be @ 366 and instead, its @ 454.4 mhz.

That doesn't add up.

 

[Shimmishim]

go back to the 266 strap and see what happens.

 

[myocardia]

Originally posted by: slag
cpuz is misreporting that, or the chart @ CALC is wrong. I have my reference frequency set at 333 and memory frequency set at 667 which should be a 1:1 ratio @ 1333 strap.

However, my memory speed should be @ 366 and instead, its @ 454.4 mhz.

That doesn't add up.

Nope, you're doing the math wrong. Intel multiplies the true FSB by 4, when they say what the stock FSB is on their processors. So, 333.33x4= 1,333 Mhz, the strap you're using, which is 4:5, just like CPU-Z is telling you. Your processor's non-overclocked FSB is 266 Mhz, not 333 Mhz. Set your RAM to run @ 266, or the 1066 setting/strap, and it will then be 1:1 with the processor.

 

[slag]

Originally posted by: myocardia

Originally posted by: slag
cpuz is misreporting that, or the chart @ CALC is wrong. I have my reference frequency set at 333 and memory frequency set at 667 which should be a 1:1 ratio @ 1333 strap.

However, my memory speed should be @ 366 and instead, its @ 454.4 mhz.

That doesn't add up.

Nope, you're doing the math wrong. Intel multiplies the true FSB by 4, when they say what the stock FSB is on their processors. So, 333.33x4= 1,333 Mhz, the strap you're using, which is 4:5, just like CPU-Z is telling you. Your processor's non-overclocked FSB is 266 Mhz, not 333 Mhz. Set your RAM to run @ 266, or the 1066 setting/strap, and it will then be 1:1 with the processor.

Thanks for that info. The calculator listed above is incorrect then.

 

[n7]

Originally posted by: slag

Thanks for that info. The calculator listed above is incorrect then.

No it's not

I just used that calculator to caluculate the exact numbers you listed orginally.

You don't need it though.

RAM speed is calculated based on your FSB:
1:1 = same as FSB
4:5 = 1.25x FSB
2:3 = 1.5 FSB


And so on...

 

[slag]

sure it is.

333x667 should equal 1:1 frequency, based on the calculator.

it doesn't.