View Full Version : Can't reach FSB 150 ! Why ?
I have a PII 350@490 - 140 FSB x3.5 - 256 MB PC 133 Mhz. - Voodoo 3 3000
And i can't reach the 150 FSB !
When i use 150 FSB the computer hangs when i power on... i wait 10 minutes power on again and i can get to setup BIOS over to 140 FSB.
What could be the problem ?
Could it be the Voodoo ?
Any tips WELCOME !
Thanks
Sohryu Asuka Langley
03-09-01, 11:52 PM
ram? spec? a lot of things contribute.. try lowering your CAS setting or find a -33Mhz in your BIOS setup if its a bia board.. what mobo? more voltage? huh? huh? into plz
LimeyGreg
03-10-01, 12:01 AM
Check the database - average oc is 462. Only handful of people have theirs at 500+. Try increasing the core voltage but watch the temps. You may be lucky. Your oc is still pretty good considering the chip.
Check out "got_yogurt" post "My Trip to 600Mhz on a 300Mhz PII"
Sohryu Asuka Langley (Mar 09, 2001 11:52 p.m.):
ram? spec? a lot of things contribute.. try lowering your CAS setting or find a -33Mhz in your BIOS setup if its a bia board.. what mobo? more voltage? huh? huh? into plz
The ram is 2 sticks of 128 MB PC 133 Mhz.
If i lower the cas it don't boot
What is a -33Mhz ? Same as cas ?
mobo ?
Sorry i'm a beginner
The core voltage is at 1.49 V.
Thanks
LimeyGreg (Mar 10, 2001 12:18 a.m.):
Check the database - average oc is 462. Only handful of people have theirs at 500+. Try increasing the core voltage but watch the temps. You may be lucky. Your oc is still pretty good considering the chip.
Check out "got_yogurt" post "My Trip to 600Mhz on a 300Mhz PII"
My temps are 30ºC idle and 33ºC full load 350@490
I don't know how to increase the core voltage, the BIOS doesn't have the option. I don't know why i have a core voltage of 1.49 if the default core voltage of the PII is 2.0... How can i increase it not from BIOS ?
Ofcourse i'm happy with my o/c but you know.... we always want more....
thanks
Try finding your motherboard manual or a link to it on the web. Then look for manual pin settings for the voltage. Some can be set only by physically changing switches on the motherboard.
LimeyGreg
03-10-01, 09:11 PM
That's okay - we were all beginners at one time.
I'm not familiar with your mobo, but as Marty says, check your manual and/or manufacturers web site. Older boards were not too overclocking friendly and you may be limited by it. You may be able to flash the bios for more options - but that is a little scary for a newbie, I know the first time I did it I held my breath for the whole flashing process - and crossed my fingers.
When you lower the CAS your actually asking it to work faster and you may be forcing it out of spec. Good quality ram will usually be okay but generic is a crap shoot.
Best advise I can give is to be patient and try a little at a time. Read the guides here and read the posts on the boards. When it comes time to upgrade your will be armed with all the knowledge you need to build an overclocking rig.
LimeyGreg (Mar 10, 2001 09:11 p.m.):
That's okay - we were all beginners at one time.
I'm not familiar with your mobo, but as Marty says, check your manual and/or manufacturers web site. Older boards were not too overclocking friendly and you may be limited by it. You may be able to flash the bios for more options - but that is a little scary for a newbie, I know the first time I did it I held my breath for the whole flashing process - and crossed my fingers.
When you lower the CAS your actually asking it to work faster and you may be forcing it out of spec. Good quality ram will usually be okay but generic is a crap shoot.
Best advise I can give is to be patient and try a little at a time. Read the guides here and read the posts on the boards. When it comes time to upgrade your will be armed with all the knowledge you need to build an overclocking rig.
Thanks buddy !
I'm learning this too fast to be real. two days ago i had a PII 350, today i have a PII 350@490... it's enough for me.... i will keep learning so i can improbe. I will do it better next time thanks to you people that helps every day !
I'm not that newbie in computers in general, just new in overclocking. So i had flashed my BIOS i got some new options... but my motherboard does`t support voltage selection, she detects what the micro needs.
So i will have to search some other way to get this baby more than fbs 140 !
Do you know if the voodoo 3 3000 AGP works at fsb 150 ?
Thanks for you help and patience !
if you find out how to change you voltages, lower your i/o as far as you can and raise your core to 2.2. with a good heatsink and fan this should get you to over 150fsb.
wild_andy_c
03-12-01, 04:24 AM
To lower the I/O voltage makes no sense. Increasing the I/O increases the potential speed that the RAM can opertae at.
You may well have just found the top of your PII's op speed. No more no less. Just because someone elses chip does 155Mhz FSB doesn't necessarily dictate that you will do the same.
CPU's are like chicks, you get bad ones and you get real bad ones
zeisel (Mar 11, 2001 07:57 p.m.):
if you find out how to change you voltages, lower your i/o as far as you can and raise your core to 2.2. with a good heatsink and fan this should get you to over 150fsb.
That Voodoo 3 2000 you have is AGP ?
I have checked with the tech support of DFI and my mother doesn't support voltage change... so i will have to buy a new mobo if i want to o/c to 150 fsb.
Thanks a lot !
wild_andy_c (Mar 12, 2001 04:24 a.m.):
To lower the I/O voltage makes no sense. Increasing the I/O increases the potential speed that the RAM can opertae at.
You may well have just found the top of your PII's op speed. No more no less. Just because someone elses chip does 155Mhz FSB doesn't necessarily dictate that you will do the same.
CPU's are like chicks, you get bad ones and you get real bad ones
Great comparison :)
How can you lower/increase your i/o ?
Thanks
all i meant by that is that he should mess w/his voltages a bit and that lower i/o allows me to get higher fsb
Zatan...I also have a PII350 only @ 392 as I can only reach an FSB of 112. I have a Gigabyte GA-6BXC which I nave not tried to flash the BIOS...yet. Got any suggestions?
Eric (Mar 14, 2001 10:09 a.m.):
Zatan...I also have a PII350 only @ 392 as I can only reach an FSB of 112. I have a Gigabyte GA-6BXC which I nave not tried to flash the BIOS...yet. Got any suggestions?
Before i try to help you i need to know:
What happens when you try to set the FSB more then 112 ?
I don't know you mobo.... do you change FSB in the BIOS or by switches ?
What video card and RAM do you have ?
In case your mobo allows you to change core voltage, increese it, that could help...
What temps are you getting ?
See you
no my voodoo is pci, it boots and runs fine with my ati mach64 to, oh and by the way, its running at 350@548 at the moment
zeisel (Mar 14, 2001 04:02 p.m.):
no my voodoo is pci, it boots and runs fine with my ati mach64 to, oh and by the way, its running at 350@548 at the moment
Great O/C ! Congratulations !
I think i'm limited by the voltage of CPU and the AGP bus !
I got the FSB up by switches and frankly their manual didn't even say how to do that. I just went ahead and flipped switches. I have tried to get it to 133 FSB but the PC won't even start.
I have 128 MB SDRAM PC100 and a crappy ATI ALLinWONDER 8MB with a Voodoo2 12 MB PCI add-on.
wild_andy_c (Mar 12, 2001 04:24 a.m.):
CPU's are like chicks, you get bad ones and you get real bad ones
Hmm... I like the real bad ones thank you :)
As for the chip.. hmm, temps are decent.. you have generic ram or the gooood stuff?
Also did you say your voodoo was a pci? (Same here!)
I'd try a stick of decent Ram, increasing your voltage, and for heavens sake man, get your Mother boards manual and find all the jumpers/settings for it, cant rely on just the bios softmenu's ;)
-Trek
Eric (Mar 14, 2001 08:13 p.m.):
I got the FSB up by switches and frankly their manual didn't even say how to do that. I just went ahead and flipped switches. I have tried to get it to 133 FSB but the PC won't even start.
I have 128 MB SDRAM PC100 and a crappy ATI ALLinWONDER 8MB with a Voodoo2 12 MB PCI add-on.
I think the primary problem getting to 133 fsb maybe the memory freq. but i also could be the core voltage or CPU. Try to get a 133 mhz stick of memory (from some friend just to try) or increese the CPU core voltage !
Thanks for the reply.....now..how do u go about increasing the core voltage? I will try and get a 128 PC133 but until then....
Eric (Mar 17, 2001 09:24 a.m.):
Thanks for the reply.....now..how do u go about increasing the core voltage? I will try and get a 128 PC133 but until then....
To core voltage change can be achieved from the bios (if new enough) or may be by swichs.
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