E6600 and D975XBX2

I have a D975XBX2 with a E6600 and Kingston HyperX 667Mhz RAM

I can't ajust my multiplier. Does someone have the same problem or now
how to solve?

The other thing is, when I look with CPU-Z is my multiplier switching
himself from 9x to 6x and back... He does this with standard settings
and also with a little overclocking at the moment I run it with
2880MHz, I will go a litte higher when I have the new RAMs OCZ
Platinum 4-5-4-15 (4x1GB)

Thanks Tom

'Tom' wrote, in part:
| I have a D975XBX2 with a E6600 and Kingston HyperX 667Mhz RAM
|
| I can't ajust my multiplier. Does someone have the same problem or now
| how to solve?
_____

The CPU multiplier can NOT be changed for Intel CPUs later than about the
Pentium II 300. Overclocking can only be accomplished by increasing the
FrontSide Bus frequency for these CPUs. The BIOS settings for CPU
multiplier has NO effect. At all. Can not have any effect. The CPU
multiplier is locked INSIDE the CPU. Only special experimental engineering
Intel CPUs since the Pentium II 300 have unlocked CPU multipliers.

If you have memory capable of the higher FSB, you should be able to get
upwards of 3.2 GHz with the Core 2 Duo E6600. Higher speeds will be limited
by memory performance.

The Intel Core 2 Duo E4000 series CPUs have greater overclocking potential
because the standard FSB is lower (800 MHz vs. 1066 MHz) and is so not
limited as much by memory performance. For overall USEFUL performance, an
overclocked Core 2 Duo E6600 is probably better because of a higher FSB and
larger L2 Cache.

Phil Weldon

<> wrote in message
news: ups.com...
|I have a D975XBX2 with a E6600 and Kingston HyperX 667Mhz RAM
|
| I can't ajust my multiplier. Does someone have the same problem or now
| how to solve?
|
| The other thing is, when I look with CPU-Z is my multiplier switching
| himself from 9x to 6x and back... He does this with standard settings
| and also with a little overclocking at the moment I run it with
| 2880MHz, I will go a litte higher when I have the new RAMs OCZ
| Platinum 4-5-4-15 (4x1GB)
|
| Thanks Tom
|

And does somebody nows something about this one?

The other thing is, when I look with CPU-Z is my multiplier switching
himself from 9x to 6x and back...

'Tom' wrote:
| And does somebody nows something about this one?
|
| The other thing is, when I look with CPU-Z is my multiplier switching
| himself from 9x to 6x and back...
_____

My answer applies to the Intel E6600. What you see with CPU-Z is 'thermal
throttling'. The CPU, in a completely on-CPU-chip action that REDUCES the
CPU multiplier to lower heat production if the CPU temperature becomes too
high. You can disable 'thermal throttle' (automatic CPU multiplier
reduction [based on CPU temperature], but you can NOT directly change the
CPU multiplier. You can NOT INCREASE the CPU multiplier.

Phil Weldon

<> wrote in message
news: oups.com...
| And does somebody nows something about this one?
|
| The other thing is, when I look with CPU-Z is my multiplier switching
| himself from 9x to 6x and back...
|

Phil Weldon wrote:
> 'Tom' wrote:
> | And does somebody nows something about this one?
> |
> | The other thing is, when I look with CPU-Z is my multiplier switching
> | himself from 9x to 6x and back...
> _____
>
> My answer applies to the Intel E6600. What you see with CPU-Z is 'thermal
> throttling'. The CPU, in a completely on-CPU-chip action that REDUCES the
> CPU multiplier to lower heat production if the CPU temperature becomes too
> high. You can disable 'thermal throttle' (automatic CPU multiplier
> reduction [based on CPU temperature], but you can NOT directly change the
> CPU multiplier. You can NOT INCREASE the CPU multiplier.
>
> Phil Weldon

It could be EIST.

http://www.intel.com/cd/channel/rese...nce/203838.htm

I haven't been able to find any info on how EIST works on current
processors. On the older stuff, there were two multiplier values.
AMD has multiple P-states for their processors, but I don't know
if Intel does now as well or not. I cannot find any details on
the Intel site, for how many P-states they use. But that might be
why the multipler value is changing. Disabling EIST in the BIOS
might be the first step I'd try, to make it stop.

Paul

>
> <> wrote in message
> news: oups.com...
> | And does somebody nows something about this one?
> |
> | The other thing is, when I look with CPU-Z is my multiplier switching
> | himself from 9x to 6x and back...
> |
>
>

'Paul' wrote, in part:
| It could be EIST.
|
|
http://www.intel.com/cd/channel/rese...nce/203838.htm
|
| I haven't been able to find any info on how EIST works on current
| processors.
_____

The behavior seen by the original poster IS Enhanced Intel Speedstep
Technology at work.

Additional information is at
http://www.intel.com/support/processors/core2duo/
and
http://www.intel.com/design/processo...hts/313278.htm
(particularly 6.3)
and
http://www.intel.com/design/processo...pdt/313279.htm
and
http://www.intel.com/cd/channel/rese...eng/203838.htm .

Phil Weldon





"Paul" <> wrote in message news:es8c5d$fl3$...
| Phil Weldon wrote:
| > 'Tom' wrote:
| > | And does somebody nows something about this one?
| > |
| > | The other thing is, when I look with CPU-Z is my multiplier switching
| > | himself from 9x to 6x and back...
| > _____
| >
| > My answer applies to the Intel E6600. What you see with CPU-Z is
'thermal
| > throttling'. The CPU, in a completely on-CPU-chip action that REDUCES
the
| > CPU multiplier to lower heat production if the CPU temperature becomes
too
| > high. You can disable 'thermal throttle' (automatic CPU multiplier
| > reduction [based on CPU temperature], but you can NOT directly change
the
| > CPU multiplier. You can NOT INCREASE the CPU multiplier.
| >
| > Phil Weldon
|
| It could be EIST.
|
|
http://www.intel.com/cd/channel/rese...nce/203838.htm
|
| I haven't been able to find any info on how EIST works on current
| processors. On the older stuff, there were two multiplier values.
| AMD has multiple P-states for their processors, but I don't know
| if Intel does now as well or not. I cannot find any details on
| the Intel site, for how many P-states they use. But that might be
| why the multipler value is changing. Disabling EIST in the BIOS
| might be the first step I'd try, to make it stop.
|
| Paul
|
| >
| > <> wrote in message
| > news: oups.com...
| > | And does somebody nows something about this one?
| > |
| > | The other thing is, when I look with CPU-Z is my multiplier switching
| > | himself from 9x to 6x and back...
| > |
| >
| >

Phil Weldon wrote:
> 'Paul' wrote, in part:
> | It could be EIST.
> |
> |
> http://www.intel.com/cd/channel/rese...nce/203838.htm
> |
> | I haven't been able to find any info on how EIST works on current
> | processors.
> _____
>
> The behavior seen by the original poster IS Enhanced Intel Speedstep
> Technology at work.
>
> Additional information is at
> http://www.intel.com/support/processors/core2duo/
> and
> http://www.intel.com/design/processo...hts/313278.htm
> (particularly 6.3)
> and
> http://www.intel.com/design/processo...pdt/313279.htm
> and
> http://www.intel.com/cd/channel/rese...eng/203838.htm .
>
> Phil Weldon
>

What I'm referring to, is when they say:

"Multiple voltage/frequency operating points"

they don't say how many points. EIST on older processors was
noteworthy, because it used precisely two points. I'm curious
if Intel has invested all the extra effort in VRD11 and
D-VID, only to still have the same two operating states.
AMD was different, because they test their processors at
more than two P-states, but Intel provides no such
explicit information about their products. Makes me
wonder how the BIOS knows precisely what ACPI objects
to pass to the OS (i.e. where is the knowledge about
the number of FID/VID combinations stored). At least
with AMD, you could look up what states were supported.

Paul

I did disable EIST, but it is still switching between 6 and 9, any
other idees?

WHERE did you disable EIST? There is a BIOS setting and a Windows XP
setting. See the reference from my previous post
http://www.intel.com/cd/channel/rese...eng/203838.htm ,

under 'Integration'
for the BIOS:
1.. Ensure Enhanced Intel SpeedStep technology is enabled in your BIOS.
For Intel desktop boards the Intel SpeedStep technology option is under the,
"Power," tab and labeled, "EIST." Ensure it is set to, "Enabled."
for Windows XP:

Under Control Panel - open Power Options
a.. Under the Power Schemes pull down menu
a.. To turn Enhanced Intel SpeedStep technology ON select, "Minimal
Power Management," power scheme.
b.. To turn Enhanced Intel SpeedStep technology OFF select, "Always On,"
power scheme.
More than that I cannot say, but only recommend you contact Intel customer
support.

Phil Weldon

<> wrote in message
news: oups.com...
|I did disable EIST, but it is still switching between 6 and 9, any
| other idees?
|

'Paul' wrote, in part:
| they don't say how many points. EIST on older processors was
| noteworthy, because it used precisely two points. I'm curious
| if Intel has invested all the extra effort in VRD11 and
| D-VID, only to still have the same two operating states.
| AMD was different, because they test their processors at
| more than two P-states,
_____

Intel historically has produced more robust CPUs than AMD. Intel EIST is
implemented on-CPU-die for thermal control, one step-down seems sufficient,
and clearly is the explanation for the original poster. What purpose would
additional CPU multiplier and CPU core voltage setbacks serve? Other than
to offer operation using variously inadequate thermal solutions?

Phil Weldon

"Paul" <> wrote in message news:es8jd5$u7c$...
| Phil Weldon wrote:
| > 'Paul' wrote, in part:
| > | It could be EIST.
| > |
| > |
| >
http://www.intel.com/cd/channel/rese...nce/203838.htm
| > |
| > | I haven't been able to find any info on how EIST works on current
| > | processors.
| > _____
| >
| > The behavior seen by the original poster IS Enhanced Intel Speedstep
| > Technology at work.
| >
| > Additional information is at
| > http://www.intel.com/support/processors/core2duo/
| > and
| > http://www.intel.com/design/processo...hts/313278.htm
| > (particularly 6.3)
| > and
| > http://www.intel.com/design/processo...pdt/313279.htm
| > and
| > http://www.intel.com/cd/channel/rese...eng/203838.htm .
| >
| > Phil Weldon
| >
|
| What I'm referring to, is when they say:
|
| "Multiple voltage/frequency operating points"
|
| they don't say how many points. EIST on older processors was
| noteworthy, because it used precisely two points. I'm curious
| if Intel has invested all the extra effort in VRD11 and
| D-VID, only to still have the same two operating states.
| AMD was different, because they test their processors at
| more than two P-states, but Intel provides no such
| explicit information about their products. Makes me
| wonder how the BIOS knows precisely what ACPI objects
| to pass to the OS (i.e. where is the knowledge about
| the number of FID/VID combinations stored). At least
| with AMD, you could look up what states were supported.
|
| Paul