Dv1000z Underclocking?

well ive heard about people placing there celeron ms locked at 300mhz, from the bios so i was wondering if you could do this with the hp bios, i doubt it but asking because im getting a dv1000z with
Intel Celeron M Processor 380 & 1.6GHz Processor Speed

14.0" WXGA High Definition Brightview Display With 1280 x 768 Resolution

80GB Hard Drive (4200RPM)

512MB 333MHz DDR memory for multitasking power, expandable up to 2GB.

Lightscribe 8X DVD+/-R/RW & CD-RW Combo Drive With Dual Layer Support

54g 802.11b/g WLAN With 125HSM/Speedbooster support, 10/100 RJ-45 LAN

Weighs only 2.41 kg and measures just 2.99 cm thin for easy portability.

Pointing Device: Touchpad With On/Off Button & Dedicated Vertical Scroll Up/Down Pad

I/O Ports: 3 x USB 2.0, 1 x Headphone Out, 1 x Microphone In, 1 x VGA(15 Pin), 1 x TV Out (S-Video), 1 x RJ-11 Modem, 1 x RJ-45 LAN, 1 x Expansion Port 2, 1 x IEEE 1394 Firewire (4 Pin), 1 x Consumer IR (Remote Receiver)

HP Mobile Remote Control & Mobile Stereo Earbud Headphones, HP Quickplay, 6-In-1 Media Reader

MS Windows XP Home Edition Service Pack 2 operating system preinstalled; software package includes MS Works, MS Money, MS Encarta Plus and more.


Im asking this because I do not have much need for speedstep, although on long plane trips which are rare for me, i would like more battery life.

also upgrading the cpu? i know some of these have core duos in them, although i dont know how to open it or really dont want to. but is it possible? (wondering because my graphics is classified as the "celeron" option what differences does this make?

you can tell me go pentium m turion or whatever im on a budget and this is a good deal for 900 Canadian, i was going for a sempron v2000z but ran out. anyways Ty

 

Celerons do not have speedstep. Right now, I would not buy anything with a Celeron in it, I think HP just sells the leftover inventory

 

Yeah, underclocking the Celeron M is not ppossible as it does not have Speedstep and also since it is a laptop, there wont be any advanced options to controlthe cpu speed.

Regarding cpu upgrades, you should be able to put a 400MHz FSB Pentium M. The Celeron M graphics is just to indicate lower end options like the absence of firewire port, multimedia card reader and a few extra USB ports. The Core Duo or any other future processor wont work as they are pin incompatible and wont fit into the socket made for the Celeron M.

 

...... Umm wow, its pretty much fsb just as in OVERCLOCKING u lower the fsb (front side bus) and it will lower the processor, i need to know if the bios enables this or if you could flash it to make this happen,


think of it this way pentium 4s dont have speedstep but they can go up in speed, im talking about the reverse. Ive heard of people doing it.

 

Well as I said before there arent any advanced options to change the FSB in the BIOS. Without which it is virtualy impossible to decrease the FSB.
Good luck on finding a BIOS which will work instead of the OEM BIOS. This works a lot of times for desktops but for laptops it is quite rare and unlikely to work since most laptops are propreitary. Unless you can mod the BIOS there is probably no way to find a BIOS which will open up those advanced options.

You could try using Clockgen( http://www.cpuid.org/clockgen.php) which is regularly use to increase the FSB, but I dont think that it can decrease. Try it out and see if you can get it to work.

 

thank you and sorry for not reading thorough last time

 

Yes, using clockgen we can reduce the CPU speed. But it is very limited because this also decreases PCI/AGP/PCIe frequency which may cause problems esp with HDD. I guess You may safely go down to 28MHz for PCI, making for example Celeron 1.5GHz to 12.6GHz (something like that).

But they savings may not be substantial as voltage is still high. Anyways you could give it shot.