我的戴尔 precision T7500 工作站/服务器有问题。买了 5 根 16GB DDR3 ECC 内存，希望升级系统中可用的内存总容量。没有错误，bios 可以看到，即使使用也dmidecode --type memory没有。free -h输出总内存为 31Gi。
输出dmidecode --type memory cat /proc/meminfo free -h
root@pve:~# dmidecode --type memory
# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 2.5 present.
Handle 0x1000, DMI type 16, 15 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: Multi-bit ECC
Maximum Capacity: 96 GB
Error Information Handle: Not Provided
Number Of Devices: 6
Handle 0x1100, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x1000
Error Information Handle: No Error
Total Width: 72 bits
Data Width: 64 bits
Size: 16 GB
Form Factor: DIMM
Set: None
Locator: DIMM 1
Bank Locator: Not Specified
Type: DDR3
Type Detail: Registered (Buffered)
Speed: 1600 MT/s
Manufacturer: 80CE04B380CE
Serial Number: 391B773A
Asset Tag: 02143621
Part Number: M393B2G70QH0-YK0
Handle 0x1101, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x1000
Error Information Handle: No Error
Total Width: 72 bits
Data Width: 64 bits
Size: 16 GB
Form Factor: DIMM
Set: None
Locator: DIMM 2
Bank Locator: Not Specified
Type: DDR3
Type Detail: Registered (Buffered)
Speed: 1600 MT/s
Manufacturer: 80CE04B380CE
Serial Number: 391B7711
Asset Tag: 02143621
Part Number: M393B2G70QH0-YK0
Handle 0x1102, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x1000
Error Information Handle: No Error
Total Width: 72 bits
Data Width: 64 bits
Size: 16 GB
Form Factor: DIMM
Set: None
Locator: DIMM 3
Bank Locator: Not Specified
Type: DDR3
Type Detail: Registered (Buffered)
Speed: 1600 MT/s
Manufacturer: 80CE04B380CE
Serial Number: 391B6EDE
Asset Tag: 02143621
Part Number: M393B2G70QH0-YK0
Handle 0x1103, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x1000
Error Information Handle: No Error
Total Width: 72 bits
Data Width: 64 bits
Size: 16 GB
Form Factor: DIMM
Set: None
Locator: DIMM 4
Bank Locator: Not Specified
Type: DDR3
Type Detail: Registered (Buffered)
Speed: 1600 MT/s
Manufacturer: 80CE80B380CE
Serial Number: 35B63B0A
Asset Tag: 02130963
Part Number: M393B2G70BH0-YK0
Handle 0x1104, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x1000
Error Information Handle: No Error
Total Width: 72 bits
Data Width: 64 bits
Size: 16 GB
Form Factor: DIMM
Set: None
Locator: DIMM 5
Bank Locator: Not Specified
Type: DDR3
Type Detail: Registered (Buffered)
Speed: 1600 MT/s
Manufacturer: 80CE80B380CE
Serial Number: 35D44E74
Asset Tag: 02131163
Part Number: M393B2G70BH0-YK0
Handle 0x1105, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x1000
Error Information Handle: No Error
Total Width: 72 bits
Data Width: 64 bits
Size: 1 GB
Form Factor: DIMM
Set: None
Locator: DIMM 6
Bank Locator: Not Specified
Type: DDR3
Type Detail: Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 80AD80B380AD
Serial Number: 12171ABD
Asset Tag: 01104661
Part Number: HMT112R7TFR8C-H9
root@pve:~# cat /proc/meminfo
MemTotal: 32855880 kB
MemFree: 5121012 kB
MemAvailable: 7798196 kB
Buffers: 404944 kB
Cached: 2308224 kB
SwapCached: 0 kB
Active: 3655696 kB
Inactive: 3840888 kB
Active(anon): 2158044 kB
Inactive(anon): 3041444 kB
Active(file): 1497652 kB
Inactive(file): 799444 kB
Unevictable: 47320 kB
Mlocked: 47320 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 436 kB
Writeback: 0 kB
AnonPages: 4784652 kB
Mapped: 566780 kB
Shmem: 408372 kB
KReclaimable: 843760 kB
Slab: 5255540 kB
SReclaimable: 843760 kB
SUnreclaim: 4411780 kB
KernelStack: 17104 kB
PageTables: 40440 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 16427940 kB
Committed_AS: 13810796 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 978100 kB
VmallocChunk: 0 kB
Percpu: 153856 kB
HardwareCorrupted: 0 kB
AnonHugePages: 2025472 kB
ShmemHugePages: 0 kB
ShmemPmdMapped: 0 kB
FileHugePages: 0 kB
FilePmdMapped: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
Hugetlb: 0 kB
DirectMap4k: 13174756 kB
DirectMap2M: 20377600 kB
DirectMap1G: 0 kB
root@pve:~# free -h
total used free shared buff/cache available
Mem: 31Gi 23Gi 4.9Gi 406Mi 3.4Gi 7.4Gi
Swap: 0B 0B 0B
已经尝试了许多 RAM 配置：在不同的插槽中，不同的顺序，没有 1GB 内存条和 16GB 内存条（不同型号的内存条等等）。