Intel Centrino Overclocking Guide Posted!

Dashken · 30th Jan 2005, 09:50 PM

Due to their proprietary nature, notebooks have so far eluded attempts at overclocking. Except for isolated cases, notebooks have so far been safe from the overclocking craze. Until today, that is.

Today, we will show you how to overclock Intel Centrino motherboards! We will show you how to do it, as well as explore the risks and the rewards associated with such an attempt.

Link : Intel Centrino Overclocking Guide!

aye29 · 31st Jan 2005, 01:29 AM

In the section about PCI Speeds, you said that "we only tested up to the FSB speed of 125MHz. At that FSB speed, the PCI bus would be running at 41.6MHz." Why does the screenshot of ClockGen in the previous section show a PCI speed of only 20.24MHz when the FSB speed is 121MHz?

Adrian Wong · 31st Jan 2005, 01:32 AM

Quote:

Originally Posted by aye29

In the section about PCI Speeds, you said that "we only tested up to the FSB speed of 125MHz. At that FSB speed, the PCI bus would be running at 41.6MHz." Why does the screenshot of ClockGen in the previous section show a PCI speed of only 20.24MHz when the FSB speed is 121MHz?

That's because that screenshot was for the processor speed of 1.7GHz with the FSB speed of 121MHz and PCI clock speed of 40.48MHz.

After that, we went a bit further.. to 1.75GHz but no further. We did not take a screenshot for 1.75GHz.

aye29 · 31st Jan 2005, 01:39 AM

I understand that you didn't take a screenshot of the processor at 1.75GHz. I don't understand why ClockGen reported the PCI speed to be only 20.24Mhz and not 40.48MHz as it should be when running at 1.70GHz.

Adrian Wong · 31st Jan 2005, 01:56 AM

Quote:

Originally Posted by aye29

I understand that you didn't take a screenshot of the processor at 1.75GHz. I don't understand why ClockGen reported the PCI speed to be only 20.24Mhz and not 40.48MHz as it should be when running at 1.70GHz.

We are not sure either.

Possibly the Toshiba M30 motherboard is using a minor variation of the ICS clock generator. This may have allowed proper adjustment of the FSB but caused ClockGen to report the PCI and AGP clocks at half the actual clock speeds.

Chai · 31st Jan 2005, 07:44 AM

These clockgens may not be accurate when reporting the PCI and AGP speed, because they normally cannot detect the PCI speed thru software, this is especially true for boards without PCI lock.

Adrian Wong · 31st Jan 2005, 01:03 PM

Yeah, that's why we still had to confirm that there was no PCI lock with the Centrino motherboard by running tests with HDTach.

zamo_x · 31st Jan 2005, 02:56 PM

i have the same model of notebook (satellite m30). i have tried to overclock.. all the things work excellent except the sound.. which doesn't want. it works only at default fsb.
what about the cooling? have you seen any difference, heat increase?

peaz · 31st Jan 2005, 05:53 PM

Looks like the sound chip does not like the increased PCI Bus, i guess there's no choice but to bump it back down to the default speed

Adrian Wong · 31st Jan 2005, 06:04 PM

Huh, you sure the sound chip won't work, even with a slight overclock?

There will be an increase in thermal output, no doubt. After all, everything is now running faster.

However, the Pentium M processor and the i855PM chipset don't have a very high thermal output in the first place so you should not need to worry too much about overheating.

In fact, our M30 was completely stable even at 1.75GHz. We could have gone higher, I suspect, if only the PCI bus was locked.

30th Jan 2005, 09:50 PM	#1 (permalink)
Dashken Administrator! Join Date: 21 Apr 2003 Location: Penang Posts: 30,332 Reputation: 2417 Rep Power: 62	Intel Centrino Overclocking Guide Posted! Due to their proprietary nature, notebooks have so far eluded attempts at overclocking. Except for isolated cases, notebooks have so far been safe from the overclocking craze. Until today, that is. Today, we will show you how to overclock Intel Centrino motherboards! We will show you how to do it, as well as explore the risks and the rewards associated with such an attempt. Link : Intel Centrino Overclocking Guide! __________________ \| Intel C2Q Q9450 \| MSI P45 Neo3-FR \| 2 x 2GB OCZ / 2 x 1GB G.SKILL DDR2 800 \| 1 x Seagate 250GB HDD \| 2 x Seagate 750GB HDD \| 3 x Seagate 1TB HDD \| NVIDIA GeForce 9500GT \| Cooler Master CM690 chassis \| Cooler Master eXtreme Power Plus 550W PSU \| Dell E248WFP 24" Widescreen \| Windows 7 Ultimate x64 \| Blog : Dashken's I-Blog Gallery : Dashken's I-Paintings

31st Jan 2005, 07:44 AM	#6 (permalink)
Chai Administrator Join Date: 6 Oct 2002 Location: Maranello Posts: 28,333 Reputation: 4864 Rep Power: 84	These clockgens may not be accurate when reporting the PCI and AGP speed, because they normally cannot detect the PCI speed thru software, this is especially true for boards without PCI lock. __________________ Chai (Contributor & Forum Admin) http://www.techarp.com/

31st Jan 2005, 01:03 PM	#7 (permalink)
Adrian Wong Da Boss Join Date: 10 Oct 2002 Location: In front of my ASUS F8V notebook! Posts: 33,850 Reputation: 3948 Rep Power: 80	Yeah, that's why we still had to confirm that there was no PCI lock with the Centrino motherboard by running tests with HDTach. __________________ Dr. Adrian Wong Tech ARP \| Blog @ Tech ARP \| The Free Trade Zone DYKT : The only offshore account I have is at the sand bank? My blog posts : - The fuss over Genetically Modified food - It's been a really bad day... - Dreambuilders - The 4Life Riovida MLM Scam - Murder From The Grave - Cancer-free water? - Alkaline Water Filter - Fact or Crap? - Live Blood Analysis (LBA) - Junk Science!

31st Jan 2005, 02:56 PM	#8 (permalink)
zamo_x Newbie Join Date: 31 Jan 2005 Posts: 2 Reputation: 0 Rep Power: 0	i have the same model of notebook (satellite m30). i have tried to overclock.. all the things work excellent except the sound.. which doesn't want. it works only at default fsb. what about the cooling? have you seen any difference, heat increase? Last edited by zamo_x : 31st Jan 2005 at 03:38 PM.

31st Jan 2005, 05:53 PM	#9 (permalink)
peaz ARP Webmaster Join Date: 13 Oct 2002 Location: http://atpeaz.com/ Posts: 8,640 Reputation: 1748 Rep Power: 33	Looks like the sound chip does not like the increased PCI Bus, i guess there's no choice but to bump it back down to the default speed __________________ Ken Ng Tech ARP Follow me at Twitter Blogs @ http://www.atpeaz.com/

31st Jan 2005, 01:29 AM	#2 (permalink)
aye29 Newbie Join Date: 31 Jan 2005 Posts: 4 Reputation: 0 Rep Power: 0	In the section about PCI Speeds, you said that "we only tested up to the FSB speed of 125MHz. At that FSB speed, the PCI bus would be running at 41.6MHz." Why does the screenshot of ClockGen in the previous section show a PCI speed of only 20.24MHz when the FSB speed is 121MHz?

31st Jan 2005, 01:39 AM	#4 (permalink)
aye29 Newbie Join Date: 31 Jan 2005 Posts: 4 Reputation: 0 Rep Power: 0	I understand that you didn't take a screenshot of the processor at 1.75GHz. I don't understand why ClockGen reported the PCI speed to be only 20.24Mhz and not 40.48MHz as it should be when running at 1.70GHz.

31st Jan 2005, 06:04 PM	#10 (permalink)
Adrian Wong Da Boss Join Date: 10 Oct 2002 Location: In front of my ASUS F8V notebook! Posts: 33,850 Reputation: 3948 Rep Power: 80	Huh, you sure the sound chip won't work, even with a slight overclock? There will be an increase in thermal output, no doubt. After all, everything is now running faster. However, the Pentium M processor and the i855PM chipset don't have a very high thermal output in the first place so you should not need to worry too much about overheating. In fact, our M30 was completely stable even at 1.75GHz. We could have gone higher, I suspect, if only the PCI bus was locked. __________________ Dr. Adrian Wong Tech ARP \| Blog @ Tech ARP \| The Free Trade Zone DYKT : The only offshore account I have is at the sand bank? My blog posts : - The fuss over Genetically Modified food - It's been a really bad day... - Dreambuilders - The 4Life Riovida MLM Scam - Murder From The Grave - Cancer-free water? - Alkaline Water Filter - Fact or Crap? - Live Blood Analysis (LBA) - Junk Science!