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Technology Stocks : 3Com Corporation (COMS)
COMS 0.001300.0%Dec 18 4:00 PM EST
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To: joe who wrote (21132)9/1/1998 3:12:00 PM
From: Steve Porter  Read Replies (1) of 45548
 
Joe,

I hope you're right and more $$ goes to companies that
are making profits.

Well Joe, it's not just me saying this but a lot of the big boys... this means there money is already moved or moving into companies like COMS.. which follows my train of thought of 2 weeks ago.

But, when the market finishes correcting, if it does, and
$$ start flowing back, I think we'll see the same
pattern as before. Net stocks are already bouncing back
a little it seems.

Just can't see it happening. I don't know.. the old saying about once bitten twice shy.

Isn't it true though, that most PC computers and workstations
are not built to work with bandwidth coming out of a
ethernet gigabit lan system?

This is true.. now for the technical answer (you have been warned)

Let's do some quick math.

1Gb (gigabit) = 125MB (MegaBytes)

Now the bus inside your PC right now (the fastest one available for a NIC) is PCI which:

runs at 33Mhz and is 32bits wide. Again 32bits = 4bytes.

so the theoretical maximum throughput of pci is

33Million x 4 bytes = 132MB/s

Now this is theoretical. By the time you add PCI retries, a PCI HD controller, etc. you will be lucky if you have 40+ MB/s left over.

Obviously this is not enough.

However, the next PCI is 66Mhz and 64bits wide. This yields a maximum throughput of 528MB/s which is plenty to accomodate a Gb ethernet card.

Steve
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