Leos Bitto wrote:
> On Mon, 17 Jan 2000, Sander Smeenk (CistroN Medewerker) wrote:
>
> > Hi Roeland!
> >
> > On Sun, 16 Jan 2000, Roeland Th. Jansen wrote:
> >
> > > > Is it possible that oc'ing my celerons could harm my IDE harddisks?
> > > > (Connected to standard IDE, not HPP366)
> > >
> > > yes it can. it has been reported by people who OC'd beyond bus speed limits
> > > IIRC. anyways -- it shows that OC isn't the way to go.
> >
> > Could it be that my harddisks, or my memory chips are old and can't handle
> > those higher FSB speeds? Would it help buying new ones?
>
> Harddisks are connected via IDE (or SCSI) which is connected via PCI. PCI
> runs still at 33 MHz if you run FSB at 66 MHz or 100 MHz. So harddisks
> can't see any difference.
But Sander told me he was running his FSB at 83MHz. Then the PCI bus
will run at 83/2 = 42MHz. He's overclocking his IDE subsystem!
> Memory chips do see a difference, but you buy PC100 chips which are
> designed to be running at 100 MHz FSB, right?
Note although the memory manufacturers would like you to believe them,
motherboard manufacturers usually spec PC100 RAM for 66MHz bus and PC125
for 100MHz FSB.
If the motherboard and the RAM are exactly in agreement on when during
the 10ns cycle the data is available/should change, then you can run a
PC100 at 100MHz. However, having a PC125 RAM running at 100MHz, allows
the motherboard to make the data available around the right time in
the cycle, and then there is a a 2ns margin before things go wrong if
one day the motherboard happens to be a bit early or late....
Roger.
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