[Cialug] OT: Gigabit speeds (was Gigabit NICs)

[Jonathan Bailey]

On a slightly related topic... Any suggestions for a board/NIC combo that
can do line speed that is decently cheap? We're looking at using a setup to
do routing, but want off the shelf parts. PCI-X is what we need, but we
don't need multi-ghz CPUs to do the job..


Jon 

-----Original Message-----
From: cialug-bounces at cialug.org [mailto:cialug-bounces at cialug.org] On Behalf
Of David Champion
Sent: Tuesday, November 14, 2006 1:46 PM
To: Central Iowa Linux Users Group
Subject: Re: [Cialug] OT: Gigabit speeds (was Gigabit NICs)

Here's a pretty good explaination of it...

http://www.karbosguide.com/hardware/module2c3.htm

Standard 33mhz, 32 bit PCI has a max bandwidth of 132MBps. This mentions
that PCI-X (133mhz 64 bit) should have 1GBps bandwidth. That's quite a big
difference.

Another thing to remember is that depending on how your chipset works and
what devices you're using, you may be sharing the PCI bus with a lot of
other devices, like sound, usb, firewire, video...

-dc

Nathan C. Smith wrote:
> I wonder if you could ever really approach a gigabit from any machine.
> Anybody have any concrete data?
> 
> We did some multicast imaging of desktop machines with gigabit 
> adapters and hit over 100 mb/s (106 iirc) and I thought that was 
> excellent.  The only way I could imagine going faster would be direct 
> from memory but then there is the lousy desktop bus.
> 
> I seem to recall some gigabit adapters have their own Southbridge, or 
> node on some motherboards.  What is the speed of a PCI or PCI/x bus like?
> 
> -Nate
> 
>> -----Original Message-----
>> From: Aaron Porter [mailto:atporter at gmail.com]
>> Sent: Tuesday, November 14, 2006 12:18 PM
>> To: Central Iowa Linux Users Group
>> Subject: Re: [Cialug] Gigabit NICs
>>
>>
>> On 11/13/06, jcbailey at code0.net <jcbailey at code0.net> wrote:
>>> Other than that, the PRO/1000s sound great so far. We can
>> get them for
>>> $31 from CDWG so it isn't too bad of a deal.
>> Those look like the desktop adapters. Depending on what you're 
>> looking for, they might be a good fit but you won't be able to push a 
>> full gig/sec. No complaints about drivers/stability/compatability 
>> though.
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