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IBM RS/6000
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== Memory == Most RS/6000 systems use proprietary IBM memory that is '''not''' interchangeable with PC SIMMs/DIMMs: * Early MCA RS/6000s (7011, 7012, 7013, 7015) use proprietary IBM 40-bit ECC SIMM cards (not PC parity SIMMs). * POWER2 systems (7012-39H, 7013-590, 7012-397) require memory installed in '''pairs''' due to the MCM memory subsystem.<ref>https://www-01.ibm.com/common/ssi/printableversion.wss?docURL=/common/ssi/rep_sm/h/897/ENUS7012-39H/index.html</ref> * 7025-F50 / F80 use ECC SDRAM DIMMs on proprietary memory carrier cards. * 7043-150 uses high-density ECC SDRAM up to 1 GB; 7044-270 expandable to 8 GB SDRAM ECC.<ref>https://public.dhe.ibm.com/software/mktsupport/techdocs/44p270wp.pdf</ref> '''All RS/6000 memory is ECC''' (single-bit correct, double-bit detect) โ IBM did not ship parity-only memory in the RS/6000 line.
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