IBM System x3755 M3 10Table 6. Maximum memory speeds for systems with AMD Opteron 6300 processorsDIMMspecificationRDIMMRank Single rank Dual rankPart numbers 46W0771 (8 GB) 46W0779 (16 GB)Rated speed 1600 MHz 1866 MHzRated voltage 1.35 V 1.5 VOperating voltage 1.35 V 1.5 V 1.5 VMax qty supported* 32 32 32Max DIMM capacity 8 GB 8 GB 16 GBMax memory capacity 256 GB 256 GB 512 GBMax. mem at rated speed None 256 GB NoneMaximum operating speed1 DIMM per channel 1333 MHz 1600 MHz 1600 MHz2 DIMMs per channel 1333 MHz 1600 MHz 1600 MHz* The maximum quantity that is supported is shown for four processors installed.Table 7. Maximum memory speeds for systems with AMD Opteron 6200 processorsDIMMspecificationUDIMM RDIMMRank Dual rank Single rank Dual rank Quad rankPart numbers 49Y1404 (4 GB) 49Y1406 (4 GB)49Y1405 (2 GB)46C7449 (8 GB)49Y1435 (4 GB)49Y1400 (16 GB)Rated speed 1333 MHz 1333 MHz 1333 MHz 1066 MHzRated voltage 1.35 V 1.35 V 1.5 V 1.35 VOperating voltage 1.35 V 1.5 V 1.35 V 1.5 V 1.5 V 1.35 V 1.5 VMax qty supported* 32 32 32 32 32 32 32Max DIMM capacity 4 GB 4 GB 4 GB 4 GB 8 GB 16 GB 16 GBMax memory capacity 128 GB 128 GB 128 GB 128 GB 256 GB 512 GB 512 GBMax. mem at rated speed 128 GB 128 GB 128 GB 128 GB 256 GB 256 GB 512 GBMaximum operating speed1 DIMM per channel 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1066 MHz 1066 MHz2 DIMMs per channel 1333 MHz 1333 MHz 1333 MHz 1333 MHz 1333 MHz 800 MHz 1066 MHz* The maximum quantity that is supported is shown for four processors installed.