If you choose to do this, make sure you have a good heat sink with a fan for 68040. They can get hot. In the lab we ran some which were rated at 50MHz and they were hot enough to burn.
On 08/14/2016 10:51 PM, V. Sigma wrote: > Hi, I just recently purchased my first Mac, a Performa 630CD (AKA > Quadra 630) for the princely sum of 53 dollars. I've done a fair bit > of research into vintage Macs before I bought one but there's still > some questions I haven't found answers to. > > 1. I haven't opened my Performa up yet, but chances are it still has > the original 68LC040 and I didn't get lucky by buying one with a > proper 040 upgrade. I've found decently priced 040 chips on eBay but > they're all 25MHz chips, which would be slower than the 33MHz LC > that's (probably) already in there. Would a 25MHz 040 installed in a > motherboard with a 33MHz clock crystal run at 33MHz or is 25MHz the > maximum speed it's capable of? > > 2. I've heard the SCSI controller in the 630 is absolutely abominable > due to being slow and outdated. Can it be replaced with a more modern > controller from another Macintosh? > > I appreciate hearing from some people with more Mac experience than I > have. > -- > -- > ----- > You received this message because you are a member of 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 leave this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/vintage-macs > > Support for older Macs: http://lowendmac.com/services/ > --- > You received this message because you are subscribed to the Google > Groups "Vintage Macs" group. > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout. -- -- ----- You received this message because you are a member of 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 leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/ --- You received this message because you are subscribed to the Google Groups "Vintage Macs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
