The DDR3 standard permits DRAM chip capacities of up to 8 gibibits (Gibit), and up to four ranks of 64 bits each for a total maximum of 16 gibibytes (GiB) per DDR3 DIMM. Because of a hardware limitation not fixed until Ivy Bridge-E in 2013, most older Intel CPUs only support up to 4-Gibit chips for 8 GiB DIMMs (Intel's Core 2 DDR3 chipsets only support up to 2 Gibit). All AMD CPUs correctly support the full specification for 16 GiB DDR3 DIMMs.