Is it necessary to turn up your FSB and MCH voltage?

[pRada]

I was wondering if it was necessary to turn up your fsb and mch voltages in bios even though my comp is stabled after overclocking. Both voltages are at "normal" right now. Core voltage is at 1.39 and bios is set 1.4375. I tried setting both at +0.1v and ran tests and it was still stabled. So I switched it back to normal and ran test again... stabled still. Please give me your input, thank you very much!

 

[peppie]

no.

Others have far more expertise in OC then me. But I try to run my OC settings at the lowest voltages that they remain stable in stress testing. Less power, Lower Temps, Win-Win.

I will say that I have had to crank up the voltage a little over time on a couple of systems. Don't know why, they just became unstable under certain games. Up voltage a small amount, ran stable again.

regards,

 

[Markfw]

What is your stability test ? If it really is stable, then no need to up them. Usually only required above 333 fsb.

 

[badnewcastle]

I think it depends on your chipset and/or mobo and/or ram...

I have the same cpu with with an nVidia chipset 680i. I had to raise the northbridge/vtt and core voltage just to get 3.2.

 

[Tweakin]

Originally posted by: pRada
I was wondering if it was necessary to turn up your fsb and mch voltages in bios even though my comp is stabled after overclocking. Both voltages are at "normal" right now. Core voltage is at 1.39 and bios is set 1.4375. I tried setting both at +0.1v and ran tests and it was still stabled. So I switched it back to normal and ran test again... stabled still. Please give me your input, thank you very much!

I have the same chip as you running on a IP35-E @ 3.4GHz. I have vcore at 1.30 and my vdimm is at 1.85. All other voltages are at default. I bumped up the vdimm as I'm running a little hot on the fsb and wanted to ensure stability. If I crank it up I hit a wall at 3.6GHz, and I need to boost the mch voltage and then I'm good to about 3.7GHz.

If you don't have to...don't. Only use voltage when you need to.

 

[Zenoth]

Not necessary, depends a lot. Mine requires +0.25V in Northbridge to remain stable at 3.7Ghz+. I know my CPU is different, etc. But just saying, I've seen some do what I've done without a single MCH volt increase.

 

[pRada]

Thank you very much for the input guys. The reason why I ask is because I noticed my MCH heatsink is extremely hot. Idk if this is normal due to overclocking but yea, it worries me. I have a Gigabyte P35-Ds3l with a ZALMAN CNPS9500. My temps at HWMonitor reads

TEMPIN0 38c
TEMPIN1 28c

Core #0 35c
Core #1 35c

GPU core 54c

I cant seem to find out what my temps is for my MCH. All I see are voltages in Bios. Anyway, thanks again.