From owner-freebsd-hackers  Sun Mar 21 12:15:20 1999
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To: Matthew Dillon <dillon@apollo.backplane.com>
Cc: Terry Lambert <tlambert@primenet.com>,
	Dag-Erling Smorgrav <des@flood.ping.uio.no>, andreas@klemm.gtn.com,
	rsnow@lgc.com, ckempf@enigami.com, wpaul@skynet.ctr.columbia.edu,
	freebsd-hackers@FreeBSD.ORG
Subject: Re: Gigabit ethernet -- what am I doing wrong? 
In-reply-to: Your message of "Sun, 21 Mar 1999 12:03:31 PST."
             <199903212003.MAA14516@apollo.backplane.com> 
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Date: Sun, 21 Mar 1999 12:13:48 -0800
From: Amancio Hasty <hasty@rah.star-gate.com>
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Hmm....
Does anyone know when the faster PCI busses (64bits or 66MHz PCI clock rate) 
are going to be availabe ?

Also, are there any giga ether cards for AGP ports?
	Tnks!
	Amancio

> :Does anyone know of a  faster PCI chipset implementation for PCs? Lets say 
> :schedule
> :to be deploy in the next 6 months...
> :
> :	Tnks,
> :	Amancio
> 
>     Most of these chips already pretty much saturate the PCI bus's available
>     bandwidth.  You aren't going to get a significant improvement unless you
>     go to a double-speed or double-wide PCI bus.  Double-wide ( 64 bits )
>     is a standard and, in fact, the Gigabit chipset we've been discussing
>     appears to be able to deal with 64 bit wide PCI busses.  However, the PCI
>     bus supplied with most PC's is a 32 bit wide bus, so you are limited
>     to an absolute best case 130 MBytes/sec or so worth of bandwidth.
> 
> 					-Matt
> 					Matthew Dillon 
> 					<dillon@backplane.com>
> 




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