When is increasing I/O voltage needed?

[theplanb]

I know that increasing core voltagehelps overclocking..
Can someone tell me when it is "appropriate" or "needed" to increase I/O voltage instead of core voltage?
Wich one should I try to increase first?

 

[Wind]

Increasing the I/O voltage helps in O/Cing...especially in FSb O/Cing. In FSB O/Cing, the entire system & its components is stress (working extra require more power). Generally, it is needed.

 

[Migroo]

Generally I agree with Wind, although its not always a good thing to do:

ie: its a pointless thing to do if your system is 1) not overclocked, 2) running fine overclocked without any Voltage increase.

Only increase the voltage once you reach the threshold where you cant get any higher / it becomes instable.

only then do it extremely carefully... (research on what common increased voltages are, do it in small increments...)

 

[DimZiE]

i only do it when my system is unstable.... (oced)

but if it's not oced or running stable oced i try to keep it at stock Voltage..or sometimes even at lower than the stock voltage..

since higher voltage always gives more heat. and heat also cause instability probs, which would require me to find a better way to cool off my CPU..

 

[theplanb]

So.. I'm thinking..
Increasing core voltage is to give more power to the CPU.. and increasing IO voltage is to give more power to the rest of the system because they are running faster than they are supposed to?
Is that umm right??

 

[Wind]

<< So.. I'm thinking..
Increasing core voltage is to give more power to the CPU.. and increasing IO voltage is to give more power to the rest of the system because they are running faster than they are supposed to?
Is that umm right?? >>


Generally, u should only bump up the vcore if the system is not stable w/ the set O/Ced speed (like they all said). The I/O voltage can be set higher even u r running at rated speed. It give great stability. The increase in I/O voltage will not damage components & heat increase is minimal.

 

[MilkPowderR]

<<
Generally, u should only bump up the vcore if the system is not stable w/ the set O/Ced speed (like they all said). The I/O voltage can be set higher even u r running at rated speed. It give great stability. The increase in I/O voltage will not damage components & heat increase is minimal. >>



I have to agree with Wind. The increase of I/O in my system also gives me great stability for all the AGP/PCI components throughout the system when the FSB is OC'ed high. I haven't experienced in damaging any of my components by increasing the VIO. The mobo temp stayed virtually the same as when the VIO not OC'ed. The rest of the chips and circuitry on the PCB were slightly warm to the touch.

 

[cookieman]

Hi!

The IO increase is generaly related to all 3.3V components, the most important one being the memory and the north bridge.
If you OC the FSB then it is sometimes necesary to increase to 3.4-3.6V the IO.

I personaly have made testings to see how this improves the OC of my Duron, and in some cases it mattered big time! Well it seemed to me the my memory did not liked the 141+ FSB (noname 133Sdram). And increasing the IO helped there... (5 minutes lock down versus 1 hour lock down with incresed IO.)

Do not increase it if you are stable! But as soon as you touch the FSB consider the IO increase an option to achieve greater results.

Cheers,