HP NC6400 Multiplier locked and CPU on 100%

Hello Guys!

My NC6400 CPU T7200 are locked at 10X 999Mhz instead of 2.0ghz and I believe the problem is Mainboard , it's a mobo with ATI grafik.

The only solution has been to USING RM-Clock and making cpu to run on full throttle trough RM-clock , but unfortunately RM-clock works after windows start and it means that every Windows start take 3-5 minutes for me.

In every other program , OS , any Linux or DOS, CPU are 100% and multiplier locked on 10X

I have tested Orthos too , it will not be able to switch multiplier to 16X , only RM-clock can do that.

Installing windows xp or 7 take 5-6 hours !


following things I have done:

Tried with or with out battery.
Tried with HP and non HP adapter 18-20 V 3,5 - 4,9Amp
Tried with DDR2 667Mhz and 800Mhz Kingston,Samsung,HP even HyperX 1 or 2 or 4 GB
Tried with few HDD or DVD drive internal and external
Tried with T5500 , T5600 , T7400 CPU
Tried with other FAN and Heatsink
Tried with other LCD / LCD cable / VGA to TV
Updated Bios 10 times and down grade it again

Right now the mainboard is pulled out from notebook and I test it with a NEW fan + Heatsink and any CPU and RAM with a bootable USB flash UBCD and same problem exist!


I have few other NC6400 mainboards fulty one with ATI graphic and two with Intel graphic ,
IS THERE ANY ONE WHO CAN PROIVDE ME TO REPLACING WHICH PART ON THIS MOBO WITH THOSE OTHER FAULTY MAINBOARD I HAVE?

Should I replace BIOS ? BIOS setup seems to be ok and t goes trough update with a bootable BIOS update with out any problem.

Thanks to HP There is NO WAY to turn of this SpeedStep thins or changing multiplier in Setup Bios.



Thanks / Pesare6969

Your Intel Core2 Duo Processor T7200 supports SpeedStep which lowers the CPU Ratio/Multiplier while there's no load.

To test, download and run BOTH Prime95 and CPU-z, start Prime95 and open CPU-z you 'should' see 2.0GHz+/-.
Prime95 - http://www.mersenne.org/freesoft/
CPU-z - http://www.cpuid.com/softwares/cpu-z.html

SpeedStep is to conserve power, I use it even on my OC'ed rigs, and I know once the CPU is under load I'm seeing the CPU go all the way up. Otherwise it's like your car idle 600 RPM or 3000 RPM while parked...which makes good sense.

Thanks for your reply.

I promise you that I know what speed-step is and I have already test it with CPU-Z , Orthos and Prime95 ! Problem is that multpler is LOCKED by mainboard !

There is nothing wrong with all my 4 intel cpu t5500, t5600 , t7200 and t7400 they work good on other machines, but on this mainboard MULTIPLIER is locked!

Installing windows xp take 5-6 hours , is that normal for a 2.0ghz dualcore cpu with 4gb hyperx ddr2 ram? HDD is a seagate momentus SSD hybrid ! I have test it with other ram and hdd too, same thing.

I'm sure that MAINBOARD is faulty, the only thing I ask you guys is, if replcing of bios could help me, I have 3 other HP nc6400 faulty mobo all of them have power problem but nothing wrong on their bios.

Is there any person who are more into mainboard parts, who can tell me which part is clockgenerator?

Should I upload some picture on this board?

Thank you for you answer.

The mainboard is alreday out of notebook and there is no CMOS battery connected! As I told before I have done that flashing renstalling/upgarde of bios at least 10 times, everything seems to be ok but nothing changes beside the bios version.

Now I have 3 other mobo which fault is battery charging or power problem but their BIOS are good, do you recommend me to replace one of those good BIOS on this faulty bord or as you call it faulty bios?