The most common cause of instability is heat. If you find that
a lot of aspects of your system are unstable, more cooling for
your case would be the first step to take. A new heatsink, case
fan, or video card cooler can prevent heat-related crashes,
and even allow higher overclocking.
a highly overclocked processor stable can be an art. A high
performance heatsink can prevent many errors, but sometimes
that's not enough. One widely used technique is to raise the
voltage of the CPU slightly. Raising the voltage is obtainable
through the bios, or motherboard jumpers. How ever, it is not
recommended that you raise the voltage of the CPU more than
+0.3v of its specified rating. If that does not help, your CPU
might have reached its limit and the only option is to bump
down the clock speed until it is stable.
in ram can be tricky. The very first option is to raise the
cas latency from 2, to 3 (often found in the bios). This may
hinder overall performance, but in many cases allows lower rated
ram to run at higher speeds. Much like raising the voltage for
a CPU, raising the I/O voltage can also cause borderline ram
to become stable. This is also done through the system bios,
or motherboard jumpers. How ever, be warned that the I/O voltage
can affect other aspects of your system, including the video
card. Another, less tested option is to shield the ram-sinks.
In most cases ram does not create much heat, the sinks often
shield the ram from any electric interference.
unstable video card can be the result of many things. Like the
processor, heat is often the culprit. This can only be reduced
with alternative cooling methods. Ramsinks are relatively cheap,
and can prevent texture corruption, and system crashes. Alternatively,
there are products which blow air all over the card, cooling
not only the ram but the heatsink and chipset as well. While
they don't work quite as well as ramsinks, and a larger chipset
heatsink, they are much easier to install and work with. If
the video card is unstable due to an overclocked AGP port there
are other options that can reduce the risk of crashes. Since
the AGP port is a fraction of the front side bus, often times
overclockers find the AGP bus running higher than specified
speed. While newer motherboard chipsets have the option of the
AGP port running at ½ the fsb (front side bus), the popular
440BX chipset is stuck with 2/3. Thus when running at anything
higher than 100mhz FSB, the AGP port is out of spec.