Although I donšt know actual numbers on the hardware side of things I can give a few bits of real world info on this...
Here at home I have a B&W G3-500 (384megs RAM OS X 10.1.5) and a 8500/233 (604e) ( 896Megs Ram Mac OS 9.1) with a KNE110TX 10/100 enet card... And when the B&W is hooked to my friends iBook it will blow large files back and forth very fast... But when I have the B&W G3 and the 8500 hooked together it is hardly noticeable speed increase from the built-in 10T connection... At work we have a Starmax 3000 (basically a 4400 with a different riser card) with a 300Mhz G3 as a file server with a RTL 8139 in it... And when serving to the machines with 100TX it is not much quicker then 10BT but the machines with 100TX go very fast between themselves... note: the Starmax is running Debian 2.2r4 and all the other machines on the network are Windows 98SE machines (yes I like the irony of a Mac running Linux being a fileserver for a bunch of pc's they converted from all Macs to pc's and the only machine left to be a file server was a Mac... :') sloopy. on 8/2/02 2:11 AM using moldy cheese [EMAIL PROTECTED] engraved this message > On 1 Aug, this message from Michael Hackett echoed through cyberspace: >> On Thu, 1 Aug 2002 16:50:41 -0400 (EDT) >> "Albert D. Cahalan" <[EMAIL PROTECTED]> wrote: >> >>> Michael Hackett writes: >>>> No, because you can't change the PCI clock. >>> >>> Do you know this specifically for his hardware? Remember that >>> it is 100% allowed to run PCI at less than 33 MHz, and that >>> this is common. >> >> Ah, well, I've never heard of that on the Mac side, but that may be the >> case. From everything I've read, the PCI clock was independent of the >> system bus clock, but nothing's to say that information wasn't wrong. > > No, you're right. The PCI clock is fixed at 33 MHz. > >> Can you point me to a source for more info? > > Look for this here on Apple's developer site: > > Designing_PCI_Cards_Drivers.pdf > > Also, Apple technote 1008 is of interest. > >> Regardless, the fact remains that any PPC Mac has plenty of PCI >> bandwidth for megabit Ethernet. > > Well, I'm having problems with a 100Mb/s Ethernet on my 7600. Remember > that 80 MB/s is the absolute maximum according to Apple > _under_optimal_conditions... meaning using 'Read Multiple' and 'Memory > Write & Invalidate' PCI commands for the card's DMA operations. No idea > what the RTL8139 on my card really uses.... > > Cheers > > Michel > > ------------------------------------------------------------------------- > Michel Lanners | " Read Philosophy. Study Art. > 23, Rue Paul Henkes | Ask Questions. Make Mistakes. > L-1710 Luxembourg | > email [EMAIL PROTECTED] | > http://www.cpu.lu/~mlan | Learn Always. " >
