IBM United States Hardware Announcement110-009IBM is a registered trademark of International Business Machines Corporation 39• Processor cards (#8332, #8334, #8335, and #8336) may not be mixed in thesystem.• All processors must be activated.– The 6-core 3.3 GHz processor card (#8335) requires that six processoractivation codes be ordered. A maximum of six processor activation codefeatures (6 x #7717, or 3 x #7717 and 3 x #2327) are allowed per processorcard.– The 8-core 3.0 GHz processor card (#8334) requires that eight processoractivation codes be ordered. A maximum of eight processor activation codefeatures (8 x #7714, or 4 x #7714 and 4 x #2324) are allowed per processorcard.– The 8-core 3.55 GHz processor card (#8336) requires that eight processoractivation codes be ordered. A maximum of eight processor activation codefeatures (8 x #7716, or 4 x #7716 and 4 x #2326) are allowed per processorcard. Thirty-two processor activations are required.– The 8-core 3.3 GHz processor card (#8332) requires that eight processoractivation codes be ordered. A maximum of eight processor activation codefeatures (8 x #7715, or 4 x #7715 and 4 x #2325) are allowed per processorcard.Power supply• The base machine contains two ac (#7740) power supplies.Redundant fans• Redundant fans standardPower cordsTwo power cords are required.The Power 750 requires 200-240 V for all configurations.System memory• A minimum 8 GB or two DIMMs of memory is required on the Power 750 system.• Eight memory DIMM slots are on a processor card. The maximum system memorywith one processor card is 128 GB. The maximum system memory is 512 GB withfour processor cards.• Different system memory feature numbers may not be mixed on the sameprocessor card. However, a system with more than one processor card may useddifferent memory feature numbers on the same system.• Memory must be installed in groups of one feature (two DIMMs), two features(four DIMMs), or four features (eight DIMMs) per processor card. Installation ofthree features (six DIMMs) is not permitted.• It is generally recommended that memory be installed evenly across all processorcards in the system. Balancing memory across the installed processor cards allowsmemory access in a consistent manner and typically results in the best possibleperformance for your configuration. However, balancing memory fairly evenlyacross multiple processor cards, compared to balancing memory exactly evenlytypically has a very small performance difference.Plans for future memory upgrades should be taken into account when deciding whichmemory feature size to use at the time of initial system order.Figure 1. Memory featuresFeature Minimum MaximumFeature number quantity quantity8 GB 1066 MHz 4526 0 16(2 x 4 GB RDIMMs)