The HP/Compaq LaserJet 4345/4345x/4345xs/4345xm uses memory upgrades as listed in the detailed specifications below. All memory and other upgrades compatible with this system are listed on this page.

Need Assistance? Please call and speak with one of our expert technicians at 800-240-8577 or US 404-935-4048 to verify exact system specs before ordering.
Memory Type
Base Memory 256MB (Removable)
Upgrade Slots 2 Sockets
Maximum Memory 512MB
Maximum Module Size 256MB
CPU & Chipset MIPS RISC 533 MHz
Bus Architecture Proprietary
Manufacturer Part Numbers
  • Q3942A
  • Q3943A
  • Q3944A
  • Q3945A
Part Number OP12.5
266MHz 100pin
In Stock
$144.99
View Product
Part Number OP12.5H
266MHz 100pin
In Stock
$232.99
View Product
Part Number OP12.5
266MHz 100pin CL
In Stock
$144.99
View Product
Part Number OP12.5H
266MHz 100pin CL
In Stock
$232.99
View Product

Upgrade References

The table below are references to other manufacturer part numbers which are specific to this device, have identical specifications to our components. This information is made available for your reference.
Part# Source References
KTH-LJ9050/512 512MB DDR PC2100 266MHz 100pin SODIMM Kingston OP12.5