[rc5] Thinking of an Alpha
gindrup at okway.okstate.edu
Mon Nov 10 20:11:51 EST 1997
First, that estimate is from the poster's own message. Second, from a
random memory advertisement (in the 18 November 1997 PC Mag, p. 67):
168-pin (DIMM), 4x72 (ECC)
32MB: $139 64MB: $293
First items on PriceWatch (www.pricewatch.com) in
System Memory :: EDO 64MB:
EDO ECC ( buffered): $199
EDO ECC (unbuffered): $224
System Memory :: ECC 128MB
EDO ECC (unbuffered): $589
EDO ECC ( buffered): $599
128MB DIMMs are still a little exotic and thus slightly inflated.
But, there's nothing in here that leads me to believe that $4/MB is
unreasonable for ECC EDO memory.
:) I don't seem to find ECC SDRAM specifically listed. I do,
however, find a lot of lunatic vendors who seem to think $10/MB is a
reasonable starting price.
Finally, the biggest deal for ECC (anymore) is to correct transmission
errors on the bus. As bus (and chip) voltages get lower, they will be
more susceptible to transmission interference (from their own
emissions, usually) and the extra error correcting code bits help to
recover transmissions that are incorrect in only one bit.
Comparatively, very few errors occur on the chips.
-- Eric Gindrup ! gindrup at okway.okstate.edu
______________________________ Reply Separator _________________________________
Subject: Re: Re: [rc5] Thinking of an Alpha
Author: <rc5 at llamas.net > at SMTP
Date: 1997/11/10 19:15
> $4/MB for RAM... How much do you *think* it's supposed to cost?
The only kind of RAM that will go into an alpha is ecc, as is the same for
many highend workstations. ECC has error correction built in so it can
report dirty bits and other things (I believe)... In any case, this stuff
great deal more than $4/MB...
>It isn't easy or cheap, it cost me $1,200 to buy 256MB of ram for the
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