HP's online store provides random access memory, or RAM, specifications for the company's Pavilion series of desktop computers. These include the HP Pavilion desktop computers 550-030z, 550-045t and 550-050qe models.
The HP Pavilion 550-030z desktop PC is equipped with two 4-gigabyte DDR3 memory chips on a dual-inline memory module, or DIMM. For a total of 8 gigabytes in RAM allocation, this system memory performs at a rate of 1,600 megatransfers per second. The HP Pavilion 550-045t and HP Pavilion 550-050qe models have the same RAM specifications as the HP Pavilion 550-030z.