Speedstep doesn't work when using a fixed multiplier?

Kaiju · 22 Dec 2012 at 21:19

I have a 2500K and a Biostar TP67XE.

I loaded optimised defaults in the BIOS and the stock 3.3ghz will throttle down to 1.6ghz as expected using a balanced power profile in Windows 7 64-bit.

However when I increase the multiplier to say 40 and above the CPU won't throttle down to 1.6ghz and will stay at a fixed core speed.

Any ideas why?

Subliminal Aura · 22 Dec 2012 at 21:23

too late

Kaiju · 22 Dec 2012 at 21:24

Ninja edit. XD

Subliminal Aura · 22 Dec 2012 at 21:27

Set the turbo to 40... never touch the individual core values

Kaiju · 22 Dec 2012 at 21:48

Subliminal Aura said:
Set the turbo to 40... never touch the individual core values

Thank you kind sir. Saved me much time and hassle.

It truly is Xmas.

If you don't mind could you look at my settings. (Default if not specified)

Anything you would change?

CPU Configuration
-----------------------------------
Hyper-Threading:
Active Processor Cores:
Limit CPUID Maximum:
Execute Disable Bit: Disabled
Hardware Prefetcher:
Adjacent Cache Line Prefetch:
Intel Virtualization Technology:
Power Technology: Custom
C3: Disabled
C6: Enabled
C state limit: C0

O.N.E.
------------------------------------
==========Manual CPU System=============
Fixed CPU Ratio: Disabled
CPU Ratio:
CPU Base Clock(1/100 MHz):
CPU Core Current Max (Amp): 150
Power Limit 1 Value (Watt): 300
Power Limit 2 Switch: Disabled
Power Limit 2 Value (Watt):
Internal PLL Voltage Override: Enabled
Enhanced Intel SpeedStep Technology: Enabled
Turbo Mode: Enabled
1 Core Ratio Limit: 44
2 Core Ratio Limit: 44
3 Core Ratio Limit: 44
4 Core Ratio Limit: 44
CPU C1E: Enabled

==========Manual PWM Phase System=============
CPU Request Vcore:
CPU Vcore Mode: Offset
CPU Vcore Offset: +0.00v
CPU Vcore Fixed:
Phase Control:
PWM Work Frequency:
PWM I-OUT Override:
PWM Thermal report Override:
CPU VCore LoadLine: Enabled

==========Manual Voltage System=============
CPU PLL: 1.7v
DRAM Voltage:
Vcc SA:
PCH Voltage:
Vcc IO: 1.025v

Kaiju · 22 Dec 2012 at 22:16

Okay, testing 4.6ghz with a 0.5v offset. (0.1 resulted in a BSOD after a few minutes in prime)

So far CPU-Z is showing 1.332v while running prime.

Subliminal Aura · 22 Dec 2012 at 22:57

Kaiju said:
Thank you kind sir. Saved me much time and hassle.

It truly is Xmas.

If you don't mind could you look at my settings. (Default if not specified)

No problem at all, in fact I'm glad you liked the prompt, efficient yet free service

Yeah, overclocking can be a hit or miss with a lot of trial and error involved, your best best is to find the official sandybridge overclocking thread and ask a resident expert in there.

ps Had a quick scan of your settings and all seems default, nothing wrong stood out.

All the best and the very best of luck to you