We have a 1028U-TNRTP with memory MEM-DR480L-HL01-ER21 which is already been discontinued. We want to upgrade the system and add more RAMs, can we use a similar memory MEM-DR490L-HL02-ER21 onto existing system or do we have to replace all memory?
We do not recommend mixing different memory modules. So it would be best to replace them all.