Hello!
I've noticed this site while wondering around on the internet, looking for some answers on how to change the vcore voltage on my FIC VB-601 motherboard, since it supports multiplier change and also FSB change but not vcore voltage change. I've read tons of posts on the forum, but i couldn't find any answer regarding this subject...so here i go:
My hardware specs are :
-> FIC VB-601 version 1.4, with the latest bios (MI4118) (award BIOS)
-> Pentium II Klamath 300mhz @ 2.8 Volts
...modding the voltage on the CPU itself, seems quite hard has explained in here : http://fermi.ruc.dk/~hkt/p2volt/
...and modding the board itself, i couldn't find any link nor information, regarding vcore voltage modification...
My last hope is that you guys can help me out somehow, explaining to me if it's possible (or not) to add a bios function that allows me to change the vcore voltage of the cpu, and what tools/how to do it/what code to insert, if possible...
I've used awdbedit with the hope that some vcore function would be there but hidden, with no luck...
Can any of you help me out please ?
Thank You,
Keeper
adding vcore voltage change support to a bios
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- BIOS Guru
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Not possible .
The Bios has to control VCore change via direct connections to the Voltage chip and without a connection that's not possible .
And the Klamath should get very hot if you overvolt him .
Have you tried to lower the multiplier and raise the FSB ?
I have a 266 running fine at 3x100
The Bios has to control VCore change via direct connections to the Voltage chip and without a connection that's not possible .
And the Klamath should get very hot if you overvolt him .
Have you tried to lower the multiplier and raise the FSB ?
I have a 266 running fine at 3x100
Yes..i've tried alot of things with the multiplier..:
4.5 x 66 fsb (~300 mhz - works - default)
4.0 x 75 fsb (300 mhz - works)
3.5 x 83 fsb (~290 mhz - works)
3.0 x 100 fsb (300 mhz - a little unstable)
3.0 x 103 fsb (309 mhz - a little unstable)
3.0 x 112 fsb (336 mhz - BSOD on windows)
4.0 x 83 fsb (~333 mhz - BSOD on windows)
4.5 x 75 fsb (~337 mhz - BSOD on windows)
3.0 x 133 fsb (~400 mhz - PC doesn't boot)
4.0 x 100 fsb (400mhz - PC doesn't boot)
note: This memory stick is a 256mb@133mhz from compaq.
...so, has you can see, any multiplier/fsb pair, that makes the CPU go over the 300mhz barrier, generates instability/crash on the system.
My conclusion is that the problem resides on lack of voltage..so i think..it can also be a problem with the AGP bus voltage..or even both.
The only thing that i find strange in all this, is that at 300 x 100 fsb, the PC starts to crash after sometime, though the memory stick supports up to 133mhz..
I'm just doing this OC, due to the reason that i just need about 10~12% more of CPU power, to be able to watch my divX movies at the normal speed (25frames/sec). And supposedly, this CPUs have that margin..
My video card (Riva TNT 2 Ultra) is OC'ed at 200mhz core / 220 mhz dram, way behond the defaults (150/183) and working perfectly. I'm just saying this in case you thought on overclocking it to solve my "issue"..
If you or someone else could give me a link on how to overclock the voltage on the klamath (or how to solve this), i would apreciate.
Thank you,
Keeper
4.5 x 66 fsb (~300 mhz - works - default)
4.0 x 75 fsb (300 mhz - works)
3.5 x 83 fsb (~290 mhz - works)
3.0 x 100 fsb (300 mhz - a little unstable)
3.0 x 103 fsb (309 mhz - a little unstable)
3.0 x 112 fsb (336 mhz - BSOD on windows)
4.0 x 83 fsb (~333 mhz - BSOD on windows)
4.5 x 75 fsb (~337 mhz - BSOD on windows)
3.0 x 133 fsb (~400 mhz - PC doesn't boot)
4.0 x 100 fsb (400mhz - PC doesn't boot)
note: This memory stick is a 256mb@133mhz from compaq.
...so, has you can see, any multiplier/fsb pair, that makes the CPU go over the 300mhz barrier, generates instability/crash on the system.
My conclusion is that the problem resides on lack of voltage..so i think..it can also be a problem with the AGP bus voltage..or even both.
The only thing that i find strange in all this, is that at 300 x 100 fsb, the PC starts to crash after sometime, though the memory stick supports up to 133mhz..
I'm just doing this OC, due to the reason that i just need about 10~12% more of CPU power, to be able to watch my divX movies at the normal speed (25frames/sec). And supposedly, this CPUs have that margin..
My video card (Riva TNT 2 Ultra) is OC'ed at 200mhz core / 220 mhz dram, way behond the defaults (150/183) and working perfectly. I'm just saying this in case you thought on overclocking it to solve my "issue"..
If you or someone else could give me a link on how to overclock the voltage on the klamath (or how to solve this), i would apreciate.
Thank you,
Keeper
-
- BIOS Guru
- Posts: 3153
- Joined: Thu Mar 21, 2002 8:16 pm
- Location: Near Hannover (CEBIT) Germany
- Contact:
It's very hard to overclock a Klamath to more than 300 MHz and it needs very good cooling .
More VCore should not help to overclock - it makes this hot CPU heating up your case very fast .
A little unstable at 100MHz Operation might come from FSB overclock(CPU does not like the high I/O bus) or a mainboard/memory thing
More VCore should not help to overclock - it makes this hot CPU heating up your case very fast .
A little unstable at 100MHz Operation might come from FSB overclock(CPU does not like the high I/O bus) or a mainboard/memory thing
Applying extra voltage will cause a CPU to overheat.
I think Denniss is saying that overclocking, even without applying extra voltage, will also cause a CPU to overheat. Therefore I would stay away from overclocking.
However I noted your settings to attempt to overclock the CPU mostly relied on faster FSB speeds. For a faster running speed, you will require the appropriate RAM speed to match (PC100 or PC133). You may only currently have PC66 memory.
If I were you, I would avoid overclocking because of the overheating risk. Rather install a faster CPU and retire the existing CPU to a system required for less demanding tasks.
I think Denniss is saying that overclocking, even without applying extra voltage, will also cause a CPU to overheat. Therefore I would stay away from overclocking.
However I noted your settings to attempt to overclock the CPU mostly relied on faster FSB speeds. For a faster running speed, you will require the appropriate RAM speed to match (PC100 or PC133). You may only currently have PC66 memory.
If I were you, I would avoid overclocking because of the overheating risk. Rather install a faster CPU and retire the existing CPU to a system required for less demanding tasks.