From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3CE087F0.3040907@embeddededge.com> Date: Mon, 13 May 2002 23:43:44 -0400 From: Dan Malek MIME-Version: 1.0 To: Conn Clark Cc: linuxppc-embedded@lists.linuxppc.org Subject: Re: Overclocking the Motorola 860 family References: <3CE0464A.C94BE21@esteem.com> Content-Type: text/plain; charset=us-ascii; format=flowed Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Conn Clark wrote: > Has anybody overclocked a MPC860 or a MPC850? I've tried cranking up the PLLs beyond the chip spec. None of them have ever worked. I could only get 4 MHz steps, so I tried the 80 MHz at 84MHz, which didn't work (including all UPM timing changes to ensure memory was OK). Maybe it would run at 81 or 82 MHz.... > .... Right now we run our 850 at > 49.1MHz and I want to double it. No way. I've tried lots of different speed spec parts at higher than rated values, none has ever worked for me. It appears Motorola has a pretty good screening process, and when they state 50 MHz it isn't likely to run beyond that. Even if one appears to work, I wouldn't expect a product or volume manufacturing to be successful. -- Dan ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/