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How to get NB @ 2600Mhz? - Page 3

post #21 of 50
Thread Starter 
Quote:
Originally Posted by Rocket Dog View Post
4.1-4.3Ghz aint going to happen on a C2 chip mate.

Most highly binned Phenom 2 x6's don't ever get that high.
It has happened. I've gotten my CPU to 4.1Ghz Before no problem @ 1.57V's.
post #22 of 50
Quote:
Originally Posted by Nvidia-Brownies View Post
It has happened. I've gotten my CPU to 4.1Ghz Before no problem @ 1.57V's.
At stupid voltage... And was it fully stable?

I can do 4.1Ghz at 1.5v and be 50 runs intel burn test stable.

And I have a Crosshair 4 Extreme with a Phenom 2 x6 1075T

CPU Vcore is 1.5v
DRAM is at 1.65
CPU-NB is at 1.35v
NB is at 1.4v for 3Ghz
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post #23 of 50
AMD platforms tend to have less consistent naming conventions for certain things.

Some board do have separate CPU-NB (IMC, L3, "uncore"), and NB (a misnomer, they mean chipset) voltages.

You shouldn't need to touch chipset voltages unless you are increasing hypertransport speed, and you should never need to increase hypertransport speed. I actually run a singificant underclock on my hypertransport bus, because it doesn't hurt performance at all, and allows the chipset to use less voltage and stay much cooler.

Quote:
Originally Posted by Nvidia-Brownies View Post
I only have these three Voltage options:
CPU Voltage
CPU-NB Voltage
DRAM Voltage

I cannot find one specifically for the NorthBridge other than the CPU-NB.

The Board has a max of 4Ghz NB Freq. but it doesn't have a voltage adujustment?
CPU-NB voltage is what you are looking for.

Quote:
Originally Posted by Nvidia-Brownies View Post
It has happened. I've gotten my CPU to 4.1Ghz Before no problem @ 1.57V's.
Those settings will damage the chip and/or the board in short order.
Edited by Blameless - 8/9/11 at 10:36am
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post #24 of 50
Quote:
Originally Posted by Blameless View Post
CPU-NB voltage is what you are looking for.
Giving his IMC more voltage will not stabilise the NB.
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post #25 of 50
Quote:
Originally Posted by Rocket Dog View Post
No, He's wants to overclock his NORTH BRIDGE to 2.6Ghz... Not his RAM

So He needs to leave the CPU-NB which is the IMC alone and adjust the NB voltage.
Thank you, someone who knows something about AMD's chips.
post #26 of 50
Quote:
Originally Posted by Rocket Dog View Post
No, He's wants to overclock his NORTH BRIDGE to 2.6Ghz... Not his RAM

So He needs to leave the CPU-NB which is the IMC alone and adjust the NB voltage.
dude...i've been clocking amd system for years and years...you have no clue what you're saying. i usually touch the nb chipset only if i go iwth dual gpu setup. nb voltage are usually set at 1.25 to 1.3volts if anything. he needs to worry about the memory controller. it can go as high as the cpu voltage beccuase its located on the cpu die itself. please dont confuse yourself.
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post #27 of 50
Quote:
Originally Posted by Rocket Dog View Post
Giving his IMC more voltage will not stabilise the NB.
The IMC/L3 is the NB.

If you are talking about the chipset on his motherboard, that is what he doesn't want to OC.
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post #28 of 50
Quote:
Originally Posted by sleepergsr View Post
dude...i've been clocking amd system for years and years...you have no clue what you're saying. i usually touch the nb chipset only if i go iwth dual gpu setup. nb voltage are usually set at 1.25 to 1.3volts if anything. he needs to worry about the memory controller. it can go as high as the cpu voltage beccuase its located on the cpu die itself. please dont confuse yourself.
No you're the one getting confused, The only thing that increasing the CPU-NB voltage will do is generate more heat within the chip itself and cause instability but I guess you knew that right

I run a 3Ghz MB clock and if I drop my NB voltage down by a single notch it fails stress testing and raising the CPU-NB voltage does nothing to help it. Putting the NB voltage back to 1.4v allows me to pass stress testing again.
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post #29 of 50
Thread Starter 
Quote:
Originally Posted by Rocket Dog View Post
At stupid voltage... And was it fully stable?

I can do 4.1Ghz at 1.5v and be 50 runs intel burn test stable.

And I have a Crosshair 4 Extreme with a Phenom 2 x6 1075T

CPU Vcore is 1.5v
DRAM is at 1.65
CPU-NB is at 1.35v
NB is at 1.4v for 3Ghz
I think a 1075T has C3 Stepping. Check CPU-Z.

EDIT: - The Phenom II X6 1075T Has E0 Stepping, which calls for stupid low voltage for a High OC.

Keep in mind, I bet you I got one of the CRAPPIEST Batches avaliable. I can't even unlock my dang cores without one being completely instable any way I try to unlock it. I've even gone as far as 1.6V's for unlocking to no avail.

Don't compare a Hex Core to a Dual-Core, and E0 Stepping to C2 Stepping. Two totally different things.
Edited by Nvidia-Brownies - 8/9/11 at 11:19am
post #30 of 50
Quote:
Originally Posted by Blameless View Post
The IMC/L3 is the NB.

If you are talking about the chipset on his motherboard, that is what he doesn't want to OC.
They are separte things but they're still linked, The NB still links to the CPU and it's that link that's being overclocked thus the need to increase NB voltage.
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