Date: Sun, 10 Mar 1996 16:43:06 -0800 From: "Russell L. Carter" <rcarter@geli.fastnet> To: Rashid Karimov <rashid@rk.ios.com> Cc: jkh@time.cdrom.com (Jordan K. Hubbard), hasty@rah.star-gate.com, freebsd-hackers@FreeBSD.org Subject: Re: P6 and PCI Message-ID: <199603110043.QAA05845@geli.clusternet> In-Reply-To: Your message of "Thu, 07 Mar 1996 09:53:28 EST." <199603071453.JAA19072@rk.ios.com>
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> Well, I've been off in the desert for a while, but I don't believe the situation has changed. Straight from the horse's mouth, is that no motherboard without added circuitry to enable inbound posted writes is going to see PCI I/O bus performance in excess of 5 MB/s sustained. It is alleged that the HP motherboards supplied in Vectra systems have this circuitry, but HP is only willing to commit to performance of it's on-board controllers. Perhaps reasonably, perhaps not. Best of luck! Let us know what you find. As an aside, my best guess is that all of those benchmarks on http://www.intel.com and all of the lmbench linux numbers were made with fixed, but not purchasable, motherboards. Isn't it an interesting world? Cheers, Russell > > > > > I need to buy a PC soon and was wondering about the current crop of > > > PCI chipsets . I seem to recollect some performance problems > > > with the Orion chipset. > > > > If you don't need it right away, the Triton II sounds promising. > > > > Otherwise, I'd just get an ASUS Triton MB. I would stay away > > from the Orion stuff for now simply due to cost - do you really > > want to pay $1200 for JUST the motherboard? :-) > > Jordan > > Don't even try to buy _decent PPro systems now. I have > 5 of them here ( 150-200Mhz). They are stable, fast with > arithmetics but PCI speed plainly SUCKS ! Makes them pretty > much unusable for server kind of employment. Thanks to Intel ! > I also suspect that graphics will be slow as hell too, so > no worsktation either. > > I wonder if there will be a lawsuit ... anyway what they > did is insane ! They had really fast and stable processor > and shittiest chipset and instead of making us wait for > a DECENT system, they just combined what they had at the time. > > I'm fishing around for the "Alder" SMP motherboard which runs > ftp.freebsd.org and couple of other huge archives. This > is supposedly one that does work. No luck so far :) I hope > that in the summer we'll have SMP support in FreeBSD and then > we'll fly really high :))) > > > > Rashid >
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