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Guaranteed compatible upgrades for:

HP/Compaq ProOne Series All-in-one 400 G4

Transcend JetRam 16GB (1x 16GB) DDR4-2666 PC4-21300 1.2V DR x8 260-pin SODIMM RAM Module

Transcend JetRam 16GB (1x 16GB) DDR4-2666 PC4-21300 1.2V DR x8 260-pin SODIMM RAM Module

Save $20
Crucial 16GB (1x 16GB) DDR4-2666 PC4-21300 1.2V DR x8 260-pin SODIMM RAM Module

Crucial 16GB (1x 16GB) DDR4-2666 PC4-21300 1.2V DR x8 260-pin SODIMM RAM Module

Save $30
Transcend JetRam 8GB (1x 8GB) DDR4-2666 PC4-21300 1.2V DR x8 260-pin SODIMM RAM Module

Transcend JetRam 8GB (1x 8GB) DDR4-2666 PC4-21300 1.2V DR x8 260-pin SODIMM RAM Module
Crucial 8GB (1x 8GB) DDR4-2666 PC4-21300 1.2V SR x8 260-pin SODIMM RAM Module

Crucial 8GB (1x 8GB) DDR4-2666 PC4-21300 1.2V SR x8 260-pin SODIMM RAM Module

Save $20
Crucial 4GB (1x 4GB) DDR4-2666 PC4-21300 1.2V 260-pin SODIMM RAM Module

Crucial 4GB (1x 4GB) DDR4-2666 PC4-21300 1.2V 260-pin SODIMM RAM Module

Save $20
System Specifications
Maximum Memory:
  • 32GB
Expansion:
  • 2 Sockets
Standard Memory:
  • 4GB (Removable) or
  • 8GB (Removable)
CPU/Chipset:
  • Intel Core i3 Intel Q370
  • Intel Core i5 Intel Q370
  • Intel Core i7 Intel Q370
  • Intel Pentium Intel Q370
  • Intel Celeron Intel Q370
Bus Architecture:
  • Flash - SDXC; SSD - M.2 NVMe; SSD - SATA 2.5-inch 9.5mm; USB 2.0/3.x Type-A; USB 2.0/3.x Type-C
Upgrade Path:
  • Virtually any configuration up to 32GB can be reached using any combination of 4, 8 and 16GB modules.