On Tuesday 11 September 2001 04:47 am, Adrian Lynch escribi�:
> Speaking of RAM, I hope nobody minds me slating a PC company, but it
> needs to be said. I bought a PC from Evesham a while back, it should
> have come with 128Mb PC133 SDRAM, just opened it up lastnight, and
> what do I find? Two 64Mb chips, one PC133 the other PC100.
> Whats the point of giving me a mix of the two if the lower one brings
> the higher one down?
It doesn't "bring[s] the higher one down". pc66, pc100, and pc133
are mostly nothin more than marketing labels. What is important is the
nano second rating (ns) and the cas latency rating (CL), and of course
the quality and design of the PCB the ram chips are on. The pcxxx label
is practically meaningless.
A rough gauge is that the ram should be 1000/133.3 = 7.5ns to run at
133.3mhz. Better 133mhz ram will also be non-ECC, and CL2. BUT most
ram sold under the pc133 marketing label is 8ns (really 125mhz), CL3,
on less than the best quality/design PCB.
Bottom line is ram is what'll do, according to what you set it to
with bios settings. I've had ancient 66mhz ram, before the pc<whatever>
labels were invented, that would run reliably at 112mhz, CL3. I've
been using an old 128mb stick of 8ns CL2 ram (pc100) flawlessly for
years at 135mhz CL2. It's in my system right now mixed with 2 other
sticks of pc133, all running together at 135mhz CL2 with -0- errors.
--
Tom Brinkman Galveston Bay
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Go to http://www.mandrakestore.com
