> Updated Motorola 7455 CPU Specs Doc notes Lower Core Voltage, Higher > Bus Ratios
> " Motorola posted updated MPC7455 hardware specification (PDF file > link), which is revised for XC7455A. > According to the document, the bus ratio of 2.5x - 4.5x are removed > and the settings of 8.5x, 9.5x, 10.5x, 11.5x 12.5x, 13.5x 17x, 18x, > 20x, 25x, 28x and 32x are added. > > Furthermore, Vdd is lowered from 1.6V to 1.3V, and power consumption > becomes lower too. This may be the reason that 1.25GHz processor > module has a new core supply voltage circuit. > > Because these specs are supported by XC7455 rev. 3.3 or later, current > 7455/1.25GHz (rev. 3.2) may not support new bus ratio. > M . Isobe" > > With a 32x max ratio (bus to CPU) that means even older Macs w/50MHz > bus speed limits have a future CPU speed capability of up to 1600MHz > (1.6GHz) - assuming a CPU becomes available that will run at that > speed. That also means that 1GHz 7455 (rev 3.3) CPU upgrades for older > macs are possible... but would the pricing make them worthwhile? > (Considering the cost of upgrades vs the cost of a > new/used/refurbished more modern mac with better graphics, faster > bus/memory, onboard FW/USB, etc.) > > The lower core voltage/wattage also is a plus for PowerBook G4 use. > This is from the www.xlr8yourmac web page. I wonder when and how much money ! I just thought some would be interested in reading about this. Will S -- SuperMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | Service & Replacement Parts [EMAIL PROTECTED] | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> SuperMacs list info: <http://lowendmac.com/supermacs/list.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:supermacs@;mail.maclaunch.com> To unsubscribe, email: <mailto:supermacs-off@;mail.maclaunch.com> For digest mode, email: <mailto:supermacs-digest@;mail.maclaunch.com> Subscription questions: <mailto:listmom@;lemlists.com> Archive: <http://www.mail-archive.com/supermacs%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
