I'm not sure regarding lettering codes, I'd have to look up their meanings for Motorola parts.
Regarding CPU speeds, consider the label on a chip to be a guaranteed speed, and nothing more. All CPUs of a given model come off the same wafers and are (generally speaking) made the same way, then a CPU maker tests them, and speed bins them, and labels them with their guaranteed speed. Sometimes chips that can run at higher speeds reliably get labelled with a lower speed (especially later in the manufacturing process when most of the kinks have been worked out and yields are very good). So obviously a 68040 labelled as a 40Mhz model will run at 40Mhz, whereas a 25Mhz 040 running at 40Mhz will be luck of the draw (ignoring whether or not other components are also happy running at higher speeds than they are rated for). - Nate On Wed, Mar 4, 2009 at 11:58 PM, Brian Morris <[email protected]> wrote: > > is there a meaning to HRC as opposed to just plain RC in chip letters ? > > if overclocking does it help to have a cpu rated at higher speeds. > > if I get a 40mhz can I overclock an originally 25mhz to 40 more > reliably than say a 33mhz ? > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
