Date: Mon, 13 Nov 2000 19:00:00 -0800 (PST) From: Jin Guojun (DSD staff) <jin@george.lbl.gov> To: msmith@FreeBSD.ORG Cc: hardware@FreeBSD.ORG Subject: Re: motherboard with 32-bit/66MHz PCI bus Message-ID: <200011140300.eAE300C15067@portnoy.lbl.gov>
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> > > > Does any one has an idea what this product is? > > > > It look like a processor (does not look like an ASIC) with network > > > > capability embedded in. It has two 32-bit/66MHz PCI buses. > > > > > > > > http://www.chrysalis-its.com/products/luna_340.html > > > > > > Prettymuch what the page says it is; it's a core component for a crypto > > > accelerator. The dual PCI bus part suggests that it's designed to be sat > > > on a PCI card with a local private PCI bus as well as the host bus. > > > > Back to the original issue, to be able to use this kind of product, > > it needs to have a motherboard that supports 32-bit/66MHz PCI bus, > > doesn't it? (If I do not want to pay the price for 64-bit/66MHz PCI MB) > > No; you can put a 66-MHz 64-bit device in a 33MHz 32-bit motherboard (as > long as the signalling voltages are correct). PCI is keyed to make > getting it wrong mechanically impossible. It is not plug-in issue. I am using 64-bit/66MHz GigE and OC-12 card in 32-bit/33MHz PCI slot now, but you know you will not get the full throughput in this condition. The whole idea is the price/performance ration issue. > However, if you've followed the responses to your other thread, you'll > realise that 64-bit 66MHz motherboards are *cheap* now. The cheapest 64-bit 66MHz motherboard is 370DLE which is above $300 in retail price. The newest 32-bit/33MHz motherboard is about $85. I hoped that there is a 32-bit/66MHz PCI bus motherboard below $125, which is not existing :-( -Jin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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