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Date:      Wed, 25 Feb 1998 14:56:37 -0800
From:      David Greenman <dg@root.com>
To:        Karl Denninger <karl@mcs.net>
Cc:        freebsd@isvara.net, FreeBSD Hackers <hackers@FreeBSD.ORG>
Subject:   Re: "Best" Fast Ethernet Card 
Message-ID:  <199802252256.OAA14216@implode.root.com>
In-Reply-To: Your message of "Wed, 25 Feb 1998 14:38:05 CST." <19980225143805.18181@mcs.net> 

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>What's the difference between the REV A and REV B boards?

   The A boards use a different NIC and are not supported.

>> The recently released 3com Fast Etherink XL (rev B) 3C905B NIC is the best money
>> can buy (apart from server cards costing upwards of 250UKP).
>> It has lower CPU usage than any other card, helping it to give the fastest
>> performance.

   The 3Com 3c905 driver in FreeBSD uses the card in compatibility mode (non-
DMA programmed I/O) and is thus the slowest/highest overhead board that we
support. The Intel PCI Pro/100B and Pro/100+ are the fastest/lowest overhead
boards that we support, followed by the DEC boards. I haven't measured the
performance of the new SMC cards, but I doubt that it is any lower overhead
than the Intel cards.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project

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