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- Increasing cpu voltage (on Via 266 chipset)
October 12, 2005, 7:36 am
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info. Below is my situation.
I have a somewhat old Syntax mobo based on a Via 266 chipset. I use
a socket-A Duron 1.8GHz and it runs cool (under 50 degrees C at full
load). SD-RAM timings are as fast as I can set them.
Unfortunately my mobo does not allow me to adjust the frequency
multiplier to the cpu.
All I can do is speed up the FSB (from 133 MHZ to no more than 140
MHz). This slightly speeds up the processor. The biggest
improvements from doing this seem to come from faster memory and
faster plugin cards.
In addition, I can increase the cpu voltage by 25mV, 50 mV or 75mV.
When I try one of these increased voltages it doesn't seem to do very
My question is this:
If all other things are equal then would the increased cpu voltage be
expected to improve cpu stability?
OTOH would this also shorten cpu life appreciably?
crossposted to relevant groups:
Re: Increasing cpu voltage (on Via 266 chipset)
Increasing the voltage makes transistors switch faster, which generally
allows the CPU to operate reliably at a higher frequency. Both greater
voltage and frequency increase the (electrical) power requirements; with the
same cooling arrangement that means an increase in operating temperature
which can, as I'm sure you know, cause unreliability.
A higher operating temperature will shorten the CPU life; I am not sure what
effect the voltage alone has. In any case, it is likely that if the CPU is
working reliably, it will continue to do so for longer than it is useful.
While increasing the CPU voltage will generally allow the CPU to work at a
higher frequency, in your case - increasing the FSB frequency - you are
running pretty much everything at a higher frequency. If you increase the
CPU voltage and the CPU temperature remains reasonable but there is no
increase in the amount that you can overclock before you have instability
then it is likely that some other component is the weakest link.