The DDR3 standard permits DRAM chip capacities of up to 8 gigabits (Gbit) (so 1 gigabyte by DRAM chip), and up to four ranks of 64 Gbit each for a total maximum of 16 gigabytes (GB) 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-Gbit chips for 8 GB DIMMs (Intel's Core 2 DDR3 chipsets only support up to 2 Gbit).