Cunningly, the 8641D can not only appear to the host OS as two processors, but is capable of running a separate operating systems on each core.
The 8641D - and a single core version, the MPC8641 - will sample H2 2005
Lycander said:Dual core sounds great on paper, but the G4's FSB tops off at 166 MHz. I said it once, I'll say it again: putting DDR RAM into G4 systems does not help anything. Might as well overclock PC133 RAM to 166 like they did to the FSB. The 166 MHz system bus would not be enough to feed data to both cores, unless they put a lot of cache memory onto the die.
http://www.tmcnet.com/usubmit/2004/Sep/1077209.htm said:To minimize chip-level bottlenecks, the MPC8641D processor offers low-latency access to its dual e600 cores through a high-bandwidth integrated MPX bus that is designed to scale to 667 MHz. In addition, the MPC8641D features an integrated dual memory controller that enables low-latency, high-bandwidth access to DDR and DDR2 memories.
Lycander said:Dual core sounds great on paper, but the G4's FSB tops off at 166 MHz. I said it once, I'll say it again: putting DDR RAM into G4 systems does not help anything. Might as well overclock PC133 RAM to 166 like they did to the FSB. The 166 MHz system bus would not be enough to feed data to both cores, unless they put a lot of cache memory onto the die.
Dual cores is almost litterally 2 processors crammed into one. So each core has it's own GPRs, ALU/FPU/Vector execution units, cache memory, etc. But both cores are on the same bus.WeeZer51402 said:quick question about dual core. By having two cores on the same dye do the share processor resources. ie. GPR's. Also I can understand the advantage of dual cores in a laptop application but does using multiple processors with an OS that supports SMP in a desktop mean high performance because of seperate busses etc.