Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
In message <c81wc.670347$Ig.127689@pd7tw2no>, kmchow
<Volvo740Racing@yahoo.com> writes
>Do it at your own risk, but I hear increasing the voltage is sometimes
>needed to keep an overclock stable.
Very often the case, but you usually only have to bump it up slightly.
Remember the mobile processors are basically standard ones that have
been tested to work at stock speed but at a reduced voltage and
therefore power.
Should be no problem pushing the chip to the normal 1.65V and a bit more
(that's why they are so sought after!)
>
>But why and/hor how does increasing the voltage help stability? Perhaps
>another newgroup member can elaborate?
The only reason they keep decreasing the voltage is to try and reduce
the power consumption and heat. This makes the data signals in effect
weaker (as they are smaller) and more susceptible to electrical noise,
capacitance effects etc. Remember that standard TTL and the first
pentiums were 5v chips!
Bumping the voltage back up can help 'strengthen' these data signals. If
you have adequate cooling, there isn't usually a problem. (I say
adequate as most CPU/Heatsink designs these days don't have a huge
degree of design latitude, hence you can certainly fry them if they get
overvolted and run too hot)
>
>"Rob Hemmings" <SpamDaMan@nowhere.noway.con> wrote in message
>news:c9q1at$pjq$1@south.jnrs.ja.net...
>> Has anyone *not* been able to o/c a (1.45V) mobile XP2500 at
>> 200FSB (ie as an XP3200) on an A7N8X deluxe 2.0 mobo?
>> I currently use a locked XP2500 Barton, but can't run it reliably at
>> above 185Mhz FSB and need just a little more speed.
Just a thought, as someone else has mentioned, you may be stressing your
RAM here, but also it could be the AGP or PCI buss. I'd try the voltage
at something like 1.7v but @200FSB - your AGP/PC should be 66/33 then.
If it works, start bumping the voltage down until you get probs.
You do know there is a utility to do this in real time from windows for
the mobile chips? I've done it on my machine and it works fine.
--
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