Is 100Mhz RAM a con?
Phil Chung
with a new Super 7 motherboard. I bought a 64Mb 100Mhz DIMM along with a
K6-2 400 to go with it. As an experiment, I took a DIMM from my old
motherboard and plugged it in. I haven't had any crashes since. So is
there actually any difference in 66Mhz and 100Mhz RAM?
--
+-[ Philip Chung ]
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+-[ e-mail: PCh...@unseen.freeserve.co.uk ]
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Jez Thomas
Phil Chung <PCh...@unseen.freeserve.co.uk> wrote in message
news:7mtflo$chc$1...@news5.svr.pol.co.uk...
> Is 100Mhz RAM just a marketing ploy? I recently replaced my motherboard
> with a new Super 7 motherboard. I bought a 64Mb 100Mhz DIMM along with a
> K6-2 400 to go with it. As an experiment, I took a DIMM from my old
> motherboard and plugged it in. I haven't had any crashes since. So is
> there actually any difference in 66Mhz and 100Mhz RAM?
It was probably a 100 Mhz chip in the 1st place.
Phil Chung
> > Is 100Mhz RAM just a marketing ploy? I recently replaced my motherboard
> > with a new Super 7 motherboard. I bought a 64Mb 100Mhz DIMM along with a
> > K6-2 400 to go with it. As an experiment, I took a DIMM from my old
> > motherboard and plugged it in. I haven't had any crashes since. So is
> > there actually any difference in 66Mhz and 100Mhz RAM?
>
> It was probably a 100 Mhz chip in the 1st place.
Is this likely? The PC was bought in December 1997, before 100Mhz FSB was
popular.
+-[ Philip Chung ]
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+-[ P.Y.L...@ncl.ac.uk ]
Roger Hunt
100...@finan.ncl.ac.uk>, Phil Chung <P.Y.L...@ncl.ac.uk> writes
of 66MHz RAM runs fine at 100MHz - it is a bit of a lottery though, you
may be lucky, you may not.
I have 96MB of EDO SIMMS (bought in 1997 for a fortune) that is
perfectly happy at 100MHz. :-)
--
Roger
Phil Chung
> PC100 RAM is supposed to be guaranteed to run at 100MHz. However a lot
> of 66MHz RAM runs fine at 100MHz - it is a bit of a lottery though, you
> may be lucky, you may not.
> I have 96MB of EDO SIMMS (bought in 1997 for a fortune) that is
> perfectly happy at 100MHz. :-)
Well, I'm glad that mine works at 100Mhz. Windows 98 is much smoother
with the extra RAM (though that might be down to the new 400Mhz K6-2...).
I would have had 128Mb. exceept I had already sold one of the DIMMS :-(
jazzyd1
and AGP Diamond Monster 16 meg thingy and 128 Mbyte SDRAM pc100 I thought!!!
I had a bloody nightmare of a time getting the system to run stable anyway
after changing the mboard twice Vidio card once I found it to be the bloody
mem was not pc100 even though I could slow the sys bus down to 66mhz. sys
was still very unstable took it back and changed mem for correct pc 100 mem
and i can abuse the sys as much as I like and it never crashes now, and this
has been since March. So like other people have said I suppose it depends,
but I have found it to be better.
JazzyD :-)
Phil Chung <P.Y.L...@ncl.ac.uk> wrote in message
news:Pine.GSO.3.95-960729.99...@finan.ncl.ac.uk...
Phil Chung
> >I have 96MB of EDO SIMMS (bought in 1997 for a fortune) that is
> >perfectly happy at 100MHz. :-)
>
> Are you sure? 100MHz needs 10ns timing at least, EDO can't do that,
> the fastest EDO goes to about 50ns, most common is 60. You need
> SDRAM to run that fast. Maybe your board is running the FSB at 100MHz
> but has detected your EDO for what it is and has put wait states in,
> or something.
I think VIA chipsets allow an asynchronous clock frequency. The FSB runs
at 100Mhz, but the memory bus can run at 66Mhz. So maybe this is what's
happening in this case.
Roger Hunt
>Are you sure? 100MHz needs 10ns timing at least, EDO can't do that,
>the fastest EDO goes to about 50ns, most common is 60. You need
>SDRAM to run that fast. Maybe your board is running the FSB at 100MHz
>but has detected your EDO for what it is and has put wait states in,
>or something.
>
That's probably it, my EDO will not run at the Turbo speed in BIOS at
100MHz, which is asking a bit much, but runs at the default Normal BIOS
setting.
This gives an all-round gain of about 10% versus 66MHz at Turbo.
(Using Cachechk 7)
--
Roger