HELP! Voltage for a C2 600 cb0 @900

[The Doors]

Please Help me!
I'm becoming crazy!

I'm trying to O/c @900 my C2 600 cb0 on a Msi 6337E Pro (now @746 at nominal voltage of 1.5 and Fsb83 rock stable) without result, hang at Bios Post or during bootup of Win 98se.

I've lapped Cpu & Hsf and lowered the voltage from 1.7 to 1.5 so temps now are not so bad: Cpu@idle 35 C & 48 @full load (with Folding@home), mobo always 25-26.

So, I've test Dimm (Pc133) setting Cas delay @ 2 & 3, the same!

Seems to be the Cpu voltage, I cannot set voltages up to 1.75 and the Bios is updated at last release (ver 1.3).

Have someone suggestion to do it?
I must wait for Bios update or it's better change Mobo (Asus or Abit)?

This is the configuration:

Case Tower YeongYang YY-1240 with 4 fan
(80mm & 92mm blow in and 80mm & 120 blow out)
PS Macron 300W MPT-301
Mobo MSI 6337Pro I815E
Intel C2 600Mhz cb0 @746Mhz 1.5v
128MB Dimm Pc133 @Cas2 (64Mb Semicon Cas3 & 64Mb AIM Cas 2/3)
HD0 IBM DTLA 307030 30GB UDMA-100 @7200RPM
CD-ROM Philips 32x UDMA-33
Mirò PcTv PCI (TV, Teletext & Video capture)
ASUS AGP-V3800 TNT2@140Mhz 32MB@165Mhz Pure AGP2X (side band enabled)
SoundBlaster PCI 128
Trust PCI Ethernet Card 10/100Mb
Mouse Logitech TrackMan Marble
Microsoft Natural Keyboard
Monitor Relisys RE551 1024x768@67Hz

Thank you very much :-)

[Phil]

have a look at www.hardocp.com under the articles section for info on how to get higher voltages on fc-pga chips as your cBO may need upto 1.8v or maybe 1.9v

[Newbie_Doo]

The cB0 C2-600 can be wired for 1.65V default and then adjusted with your motherboard. The next step after that is 1.90 volts, and I wouldn't go there unless you have GREAT cooling.

Go HERE: http://developer.intel.com/design/celeron/datashts/ and download the datasheet on the Celeron and read pages 18 and 87. Then go HERE: http://www.hardocp.com/articles/intel_stuff/bumpvoltage.html for the how-to on pin wiring. Good luck.

[The Doors]

Thanks for you support,
probably it's the only way possible for O/C Cpu on my Mobo, so it can reach 1.9v, but it seems a little dangerous.
Have you done it?

[Newbie_Doo]

I have a Soyo SY7VCA Motherboard. It only has adjustments for up to +10% on the voltage Adjustment. I have my cB0 C2-600 wired for 1.65V default right now. As soon as my fans arrive for the watercooling setup (Thanks Tachyon) I am upping the voltage to 1.90. I have the same stability issues that you have. I can do 900 at 1.82, but it's a little unstable. I can't multitask and browse at the same time, I get thermal lockups.

Read the links and study the datasheet. Several of us have done this successfully and it's easily reversible if you get a different mobo.

[GauntMan]

I had mine at 1.95 volts during burn-in. It was at that voltage for about 2 months. Now I get 900 at 1.75V. Your seems hot. Mine was at 31C full load @900 1.95V.

[Mr B]

The Doors (Mar 02, 2001 10:24 a.m.):
Please Help me!
I'm becoming crazy!

I'm trying to O/c @900 my C2 600 cb0 on a Msi 6337E Pro (now @746 at nominal voltage of 1.5 and Fsb83 rock stable) without result, hang at Bios Post or during bootup of Win 98se.

I've lapped Cpu & Hsf and lowered the voltage from 1.7 to 1.5 so temps now are not so bad: Cpu@idle 35 C & 48 @full load (with Folding@home), mobo always 25-26.

So, I've test Dimm (Pc133) setting Cas delay @ 2 & 3, the same!

Seems to be the Cpu voltage, I cannot set voltages up to 1.75 and the Bios is updated at last release (ver 1.3).

Have someone suggestion to do it?
I must wait for Bios update or it's better change Mobo (Asus or Abit)?

This is the configuration:

Case Tower YeongYang YY-1240 with 4 fan
(80mm & 92mm blow in and 80mm & 120 blow out)
PS Macron 300W MPT-301
Mobo MSI 6337Pro I815E
Intel C2 600Mhz cb0 @746Mhz 1.5v
128MB Dimm Pc133 @Cas2 (64Mb Semicon Cas3 & 64Mb AIM Cas 2/3)
HD0 IBM DTLA 307030 30GB UDMA-100 @7200RPM
CD-ROM Philips 32x UDMA-33
Mirò PcTv PCI (TV, Teletext & Video capture)
ASUS AGP-V3800 TNT2@140Mhz 32MB@165Mhz Pure AGP2X (side band enabled)
SoundBlaster PCI 128
Trust PCI Ethernet Card 10/100Mb
Mouse Logitech TrackMan Marble
Microsoft Natural Keyboard
Monitor Relisys RE551 1024x768@67Hz

Thank you very much :-)

Maybe I'm missing something, but i don't see listed what you are using for a heatsink/fan anywhere.

What are you using?? Thermal compound??

If you're using the intel hsf, that might have a bit to do with it.

Just wondering......

Mr B

[got_yogurt]

yeah, that does seem really hot. You might want to look into getting a new HSF combo. Also, it helps to have case cooling... Its really helped me.

[The Doors]

Thank you guys,

I've a Cpu cooler No brand (OEM) with Silicone Compound (Silmore) but I'll replace it with a Swiftech MC370-0A as soon as possible, I'm waiting answers from the European Distributor.
I wanna try before with the new Hsf @1.75v and after, if fail, try with cable wiring.

For MrB (the tuner): do you remember I've OEM cooler? :-)

[Mr B]

There is a trick to "hotwire" the voltage for the Celeron II posted elsewhere in the forum, that would help you to raise that vcore.

I wouldn't try until you get the better hsf in place, though.

Look back thru the posts in "intel cpus" for the hotwire trick.

Spring for the Arctic silver thermal compund, too. the Radio shack stuffjust won't cut it at the high end.

Mr B