Apacer DDR3 PC12800-8GB ECC Registered Server Memory for Acer G540/R520/R720 M2/AR320/AR360/AR380/AT350 F1
8GB 240pin PC3-12800 ECC Registered DIMM.

Works with

ACER Server Altos G540 M2
ACER Server Altos R520 M2
ACER Server Altos R720 M2
ACER Server AR320 F1
ACER Server AR360 F1
ACER Server AR380 F1
ACER Server AT350 F1

Please check below link for memory compatibility test:

http://ap.apacer.com/product/memory-search
More Detail
BCIT Number AP58290C
Vendor Part# AP8GACRTLU1K3
Weight 0.0100