Intel Centrino Overclocking Guide Posted!

Dashken · 30th Jan 2005, 10:50 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, 02:29 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, 02:32 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, 02:39 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, 02:56 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, 08:44 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, 02:03 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, 03:56 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, 06:53 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, 07:04 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, 10:50 PM	#1 (permalink)
Dashken Administrator! Join Date: 21 Apr 2003 Location: Penang Posts: 29,545 Reputation: 2162 Rep Power: 56	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 Core 2 Duo E6850 @ 3.2Ghz \| ASUS P5B-E Plus \| G.SKILL 2x1GB DDR2 800 \| 6 HDDs (2TB+ only ) \| NVIDIA GeForce 7600GT \| Dell E248WFP 24" Widescreen \| Blog : Dashken's I-Blog Gallery : Dashken's I-Paintings

31st Jan 2005, 08:44 AM	#6 (permalink)
Chai Administrator Join Date: 6 Oct 2002 Location: Maranello Posts: 26,115 Reputation: 3845 Rep Power: 70	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, 02:03 PM	#7 (permalink)
Adrian Wong Da Boss Join Date: 10 Oct 2002 Location: In front of my BenQ Joybook 7000 notebook! Posts: 29,426 Reputation: 2830 Rep Power: 63	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? Keep Tech ARP free! Visit our sponsors! We need PROGRAMMERS and TECHNICAL WRITERS! Contact us if you are a hot shot programmer or technical writer! My items for sale : 50x SD Card \| Memory Stick PRO \| Cyclone Energy Saver \| Seiko SS watch \| Tiger/Carlsberg beer jugs \| Travel Speakers \| Motorola V600 \| Nokia N90 SOLD! \| New Lowepro Mini Trekker AW Other items for sale @ the FTZ : Zalman CNPS9500 LED @ $20 \| Zalman CNPS7700 Cu @ $20 \| Zalman CNPS7000 Cu @ $20 \| Swarovski bracelet watches \| Dell 17" LCD \| Hi-Fi speakers \| English DIVX movies \| HP LaserJet toners! \| Office chairs

31st Jan 2005, 03:56 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 04:38 PM.

31st Jan 2005, 06:53 PM	#9 (permalink)
peaz ARP Webmaster Join Date: 13 Oct 2002 Location: http://atpeaz.placidthoughts.com/ Posts: 8,487 Reputation: 1633 Rep Power: 30	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 Visit my web gallery - Ken's Digital Canvas Shoot and Earn Money from Stock Photography Sterling@PJ Community Forums

31st Jan 2005, 02:29 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, 02:39 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, 07:04 PM	#10 (permalink)
Adrian Wong Da Boss Join Date: 10 Oct 2002 Location: In front of my BenQ Joybook 7000 notebook! Posts: 29,426 Reputation: 2830 Rep Power: 63	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? Keep Tech ARP free! Visit our sponsors! We need PROGRAMMERS and TECHNICAL WRITERS! Contact us if you are a hot shot programmer or technical writer! My items for sale : 50x SD Card \| Memory Stick PRO \| Cyclone Energy Saver \| Seiko SS watch \| Tiger/Carlsberg beer jugs \| Travel Speakers \| Motorola V600 \| Nokia N90 SOLD! \| New Lowepro Mini Trekker AW Other items for sale @ the FTZ : Zalman CNPS9500 LED @ $20 \| Zalman CNPS7700 Cu @ $20 \| Zalman CNPS7000 Cu @ $20 \| Swarovski bracelet watches \| Dell 17" LCD \| Hi-Fi speakers \| English DIVX movies \| HP LaserJet toners! \| Office chairs