Re: Over-Clocking in Vista 64
On Wed, 17 Oct 2007 18:30:55 -0700, "Charlie Russel - MVP"
<charlie@mvKILLALLSPAMMERSps.org> wrote:
>Windows doesn't care. Right up to the point where your overclocked system
>does something that it isn't supposed to do, because it failed. Either
>because of overheating or because an overclocked component produced the
>wrong output. Keep in mind that a single-bit error introduced by the CPU or
>the memory could result in a BSOD (best case) or subtle data corruption that
>goes unrecognized until it's too late (worst case).
>
>You can probably tell what I think of overclocking.
Yep, ignorance is bliss or so they tell me. ;-)
>
>You want to overclock? go for it. But _expect_ problems. And please don't
>report errors here that happen when the system is overclocked.
What I can tell is you don't really understand the topic. I've
overclocked all kinds of systems. Problems? Zero.
Lets backup. Introducing the CPU cycle.
Over simplified, one key element is the fetch-decode-execute
instruction cycle or the time period during which one instruction is
retrieved from memory, by the CPU and it's supporting circuits,
decoded then executed. View it as similar to some real word clock. The
faster the clock runs, the faster time would appear to pass or in the
case of a CPU the faster the clock runs the quicker the CPU can
process instructions and obviously the faster your computer will do
what you ask of it.
The clock frequency or how fast it oscillates between two possible
states keeping things in sync. Depending on the instruction the CPU is
processing it can take multiple cycles to complete the instruction.
The CPU is internally aware of this. So if it has two instructions to
be executed and it knows that the first will delay five clock cycles
to be executed, it will automatically start the execution of the next
instruction on the 6th clock tick. Newer CPU designs allow several
execution units to work in parallel. So in effect modern CPU's can
process multiple instructions at once.
Why overclock? Over clocking pushes the CPU to run faster because of
a higher clock rate that is driving it so the time it takes between
each cycle is shorter, thus resulting in better performance.
The CPU uses both and internal and external clocks. Instructions
internally passing through registers in the CPU itself are running at
a very high clock rate (internal clock) BUT data transferring to and
from the memory on their journey to and from the CPU is controlled by
the much slower North Bridge, a separate chip. This communication
happens over the FSB (front side bus) By bumping up how fast this bus
runs, data pulled from memory can flow faster.
That is a nutshell (lots of technical gibberish left out on purpose)
is basically what overclocking is all about. It is easy, safe and
supported by all major mother board manufactures on many of their MB
models and is easily altered form BIOS. If or not it is depends on
what you buy. Some box makers may not implement overclocking but to
suggest overclocking is dangerous, caused CPU's to overheat or Windows
or any OS to start making mistakes or corrupt data is simply
unfounded. Overclocking is self limited in you know you've pushed
things too far if the system won't boot or hangs trying. Then like I
said in my original post you simply back off a bit.