Help Over Clocking PIII500

[TheXrGuy]

:confused:
I'm looking for some advice in my OC journey. I'm running a Slot 1 PIII 500MHz on a ASUS P2B Rev1.1, I have gotten the CPU stable at 620(133MHz)@2.6V My next bus jump is 140MHz! I use Soft FSB to set the bus, every time I set it to 140MHz the system reboots. I can't understand this. It never hangs, always reboots.

I've taken out all my RAM and I am left with a Kingston 133MHz CAS 2. I've got that set to 3-3-3

The Video Card is a Voodoo 3 3000 AGP. Using the 2/3 divider, at 140MHz I think this thing would be at 93MHz?? Could that be the problem?

I'm also running a Linksys NIC, D-Link NIC, Montego II Turtle Beach Sound, ATI TV Wonder VE.

At 133MHz Bus I can set the PCI to 33MHz or 40MHz, both work fine, 140MHz bus puts the PCI to 35.

Power Supply is a 300W A-Open.

Any ideas?
I want my 700MHz!!!

Thanks

[TUK101]

That sounds like the problem to me. The Voodoo cards run extremely hot as it is when running with no OC'ing. Plus, and I am not sure, but I think that PIII 500 chip is running on the older Katmai core, and those did not OC very well. Good Luck!!!

[[OC]_SR20DE]

TheXrGuy, Hi

If it was your V3 3000 card, your computer would freeze instead of reboots. I donno.. my old V3 2000 PCI is in my Daddy's T-bird (I built it for him) with Iwill KK266 running at 143 fsb and has no problems at all. OC'ability on the V3 PCI and AGP version are different however, it's not the video card in this case. I think it is your Katmai P3 500 choking at that OC'ed level. Usually when the system is OC'ed too high, either it won't boot, get stuck when loading windows, or constant auto reboots. I afraid your CPU is maxed out. Running at 620@ 133fsb on your type of CPU is already very good.

you want 700mhz out of your P3 500?? that's gonna be too much. I haven't heard those reaching 700 yet but maybe you can! but that's not going to happen with the air cooling. But then again I donno your CPU will OC that high since it's already maxed out. Good luck!

[JetMech]

Originally posted by TheXrGuy
:confused:
I'm looking for some advice in my OC journey. I'm running a Slot 1 PIII 500MHz on a ASUS P2B Rev1.1, I have gotten the CPU stable at 620(133MHz)@2.6V My next bus jump is 140MHz! I use Soft FSB to set the bus, every time I set it to 140MHz the system reboots. I can't understand this. It never hangs, always reboots.

I've taken out all my RAM and I am left with a Kingston 133MHz CAS 2. I've got that set to 3-3-3

The Video Card is a Voodoo 3 3000 AGP. Using the 2/3 divider, at 140MHz I think this thing would be at 93MHz?? Could that be the problem?

I'm also running a Linksys NIC, D-Link NIC, Montego II Turtle Beach Sound, ATI TV Wonder VE.

At 133MHz Bus I can set the PCI to 33MHz or 40MHz, both work fine, 140MHz bus puts the PCI to 35.

Power Supply is a 300W A-Open.

Any ideas?
I want my 700MHz!!!

Thanks When you set your Pci to 33 your Agp is at 66 35=70 etc. Why are you using 3-3-3 for cas 2 memory. For the Bx chipset 140mhz will need exceptionally cooperative components and PC 133 memory set as cas3 ain't gonna hack it. Set you memory to 2-2-2 and see what happens.

[TheXrGuy]

Some excellent advice from all of you,

Thanks for all the info. I think I'll set it to 600 and be happy with that. It seems to be a sweet spot.

Cheers
TheXrGuy

[batboy]

I'll almost guarantee you'll never get that CPU and system to run at 140 MHz FSB. Sorry.

JetMech, he was trying to use RAM settings at 3,3,3 when attempting to reach 140 FSB, which is the right thing to do since those settings are more stable than 2,2,2. I never recommend uses CAS 2 settings until you can at first get the system stable using CAS 3 settings. However, I would try using the CAS 2 settings when running at 133 FSB.

[JetMech]

Originally posted by batboy
I'll almost guarantee you'll never get that CPU and system to run at 140 MHz FSB. Sorry.

JetMech, he was trying to use RAM settings at 3,3,3 when attempting to reach 140 FSB, which is the right thing to do since those settings are more stable than 2,2,2. I never recommend uses CAS 2 settings until you can at first get the system stable using CAS 3 settings. However, I would try using the CAS 2 settings when running at 133 FSB. I see your point. Thanks.