Date: Tue, 25 Feb 1997 18:06:18 -0500 From: Matt Thomas <matt@lkg.dec.com> To: "Jin Guojun[ITG]" <jin@george.lbl.gov> Cc: freebsd-hardware@freebsd.org Subject: Re: Memory speed of P6-200 (256k) Message-ID: <3.0.32.19691231190000.0069517c@netrix.lkg.dec.com>
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At 12:48 PM 2/25/97 -0800, Jin Guojun[ITG] wrote: >The PCI is a 64-bit wide bus. The maxmimum memory speed you can get from >this bus is 1000000000 * 8 / 60ns = 133333333 Bytes/sec (no inteleave). That is wrong. The PCI is typically a 32-bit wide bus running @ up to 33Mhz. 4 bytes * 33Mhz = maximum of 132MB/s assuming almost perfect bursting and no wait states. 64 bit PCI doubles that maximum to 265MB/s. -- Matt Thomas Internet: matt@3am-software.com 3am Software Foundry WWW URL: http://www.3am-software.com/bio/matt.html Westford, MA Disclaimer: I disavow all knowledge of this message
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