Hi,
Thank you for your reply to my posting.
I have already tried the ram testing and my question was if the ram I tested PC3-12800 4GB has made this error message 201 when placed in DIMM1 socket but does not produce this error message when placed in DIMM3 socket with DIMM1,DIMM2 bieng populated with 2GB RAM PC3-10600 in each slot (different speed) also this error message does not appear when I place (one) 4GB RAM PC3-10600 in DIMM1!!!
The recommended RAM for this model is PC3-10600 butCrucial and HP forum recommend using PC3-12800 as also compatible RAM.if this is the case then PC3-12800 that Iplaced in DIMM1 socket should not make error message 201.though the PC booted up and works OK after displaying this error message but the BIOS reads the ram as PC3-10600 not PC3-12800.
