The 5000X memory controller chipset has a TDP Max of 32.4W, a maximum memory bandwidth of 21 GB/s, natively supports 533 MHz and 667 MHz memory, has 4 total channels (2 riser cards with 2x dual channel pairs each), is of the PCIe v1.1 revision (this means these Mac Pros have PCIe v1.1, not v1.0!), and has a maximum temperature tolerance of 105☌.īefore Diagnosing Your Mac Pro 1,1/2,1 RAM, Remember:.It is the PCIe/RAM memory controller for your Mac Pro it’s an integrated Intel component on your logic board.Since you will be booting into a 64-bit Kernel on a 64-bit OS as of Mac OS X 10.8 and later, the RAM ceiling is lifted to the maximum that the Intel 5000X chipset memory controller can handle- 64 GB of RAM. Since the Mac Pro 1,1 and 2,1 are fully 64-bit computers, merely fitted with a 32-bit EFI, they’re totally capable of booting into a 64-bit-clean OS, which is why a modified Boot.efi file works as a workaround. The changes reflected in Mac OS X 10.8 Mountain Lion and above, are from the kernel the Mac Pro boots into. This strongly depends on your operating system.How Much RAM Can My Mac Pro 1,1/2,1 Handle? An 8×8 GB config (8 of these) is the maximum memory a Mac Pro 1,1 or 2,1 is capable of using. Pictured here, is an 8 GB PC2-5300f 667 MHz DDR2 SDRAM FB-DIMM.
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