The following table describes the Memory Addressing Limits for ESXi 5.1.x, ESXi 5.5.x, 6.x and 7.0:
Parameters
ESXi Release
5.1.x
5.5.x
6.0.x
6.5.x
6.7.x
7.0
Maximum Physical Address (MAXPA)
4 TiB
16 TiB
16 TiB
16 TiB
1024 TiB
1024 TiB
Maximum RAM Capacity (within MAXPA) [1]
2 TiB
4 TiB/6 TiB [2]
12 TiB
12 TiB
16 TiB
16 TiB
Maximum Physical Address for Non-Prefetchable PCI BAR [3]
4 GiB
4 GiB
4 GiB
4 GiB
4 GiB
4 GiB
Maximum Physical Address for Prefetchable PCI BAR
MAXPA
MAXPA
MAXPA
MAXPA
None [4]
None [4]
Note:
RAM includes DRAM (Dynamic Random Access Memory) and PMem (Persistent Memory) on releases that support PMem.
ESXi 5.5 Update 2 supports 6 TiB of RAM Capacity within MAXPA.
For PCIe Endpoints directly under a PCI Host Bridge or a Subtractive-Decode PCI-PCI bridge, BARs up to the prefetchable limit are supported in ESXi 5.1 Update 2, ESXi 5.5.x, and later.