How to disable Intel SpeedStep?

I have a profiling tool (AQTime5) to figure out execution times for my own programs. The tool says in the start-up that because variable CPU speed the results might not be correct. It suggest disabling Intel SpeedStep.

Fine, I could do that. Only that I cannot find a place or setting anywhere to disable it. HP Manual mentions such setting in the bios, but it is not there. At least not with SpeedStep name. Closest thing is "Fan always on AC always enabled".

The BIOS version is F.0B (02/12/2008). I belive it is the latest.


Does anyone happen to know how to disable the Intel SpeedStep with 8510/8710 notebooks using the latest BIOS and/or Vista (mine is x64)?

 

properties >screensaver> power options > set to always on

sorry that is for XP

 

In Vista, Set the power profile to High Performance. That should disable speedstep. If not then use NHC or RM Clock and set it to the max speed manually.

 

Like miner said about NHC, in CPU Speed tab set to "Max. Performance" That overrides my Power Now or cool and quiet whatever the feature AMD.

 

None of those methods work. The Vista setting doesn't have affect. NHC says it cannot load driver. RM Clock makes Vista to complain about unsigned drivers and refuse to install them. I was running those two applications with "Run as administrator".

 

well i didn't know what the hell SpeedStep was so i looked it up and according to wikepedia if u change ur Power Scheme to The "Home/Office Desk" option that will disable SpeedStep. Give it a try.....

Edit: But i just realized ur using Vista and it's different...like what the guys suggested above so....

 

Yea, and I already said that the Vista's native setting has no affect to this computer. The speed still varies.

 

Odd, as the High Perf scheme is supposed to stop the cpu from throttling. Perhaps you should check to see if the cpu's power state is set to 100% in High Perf's advanced power settings window.....

 

Yes, it is. Look at the picture. Left window is what it should be, middle window is the setting (it's plugged) and the right window is what Taskinfo says the true CPU speed is at the capture moment.

 

You'll need to disable speedstep in the BIOS, but I'm assuming the BIOS on your notebook has the option to change it hidden from view. I don't know what type of BIOS is on your notebook but if it's a Phoenix, you may be able to disable speedstep with Phoenix BIOS Editor or symcmos.

 

Good idea. I just wish I had such option in the BIOS. I don't think this is Phoenix BIOS or even Award one. This is some HP custom made CRAP one. At least there isn't any other manufacturer name than HP itself anywhere visible.

It is kinda funny, but the Windows based BIOS configurato's help file mentions the disable Intel SpeedStep option. However, it is not in the actual configurator. I wonder if it is in the help because it is old option, too new option or for some other computer model. The help file has copyright dated for year 2006, so perhaps it is an old manual since the tool is dated for 2008 (I think).

 

Easy as cake dude,

Go to my guide, you dont have to undervolt... the signed x64 drivers for RMclock are in there...

All you have to do is disable the 6x-12x multiplier so the CPU will always be running at 13x (2.6ghz)

 

Okay, thanks for info! That sounds like it could work.

However, I sent yesterday a message to the AQTime support asking if the Machine Cycle count would be more accurate than milliseconds. I mean the CPU cycles required to do something shouldn't be affected by the CPU speed, right? I think that the value would be inaccurate only if it actually measures the time in microseconds and then calculates the cycles from that.

Anyway, I will put to hold this disabling thing for a little while.