When the Dual-Core PowerPC 970MP third-generation G5 CPUs came out in Mid-2005, Apple had to start using a brand new Mid Bridge chip for the Macs along with it. Since the AMD 8131 only had PCI-X bridges and no PCIe bus, they couldn’t keep the old chip, replacing it with the BCM5780. (Above: Block diagram […]
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Have you ever wondered why there’s an AMD chip on the back of your Power Mac G5’s logic board, or what it’s even doing there? For higher end Mid-2003 thru Early 2005 Power Mac G5s, that’s the PCI-X “Mid Bridge” chip. This is what handles all your expansion cards! Although, it doesn’t appear in Late-2005 […]
The IBM CPC945 is a redesigned Northbridge chip mostly for the Dual-Core PowerPC 970MP CPU. It has technical upgrades over the IBM CPC925, including a faster HyperTransport Bus. It’s also capable of talking to the PowerPC 970fx second-generation G5 chip, which means it may be found in other Late 2005 Macs on the logic board. […]