I have asus n551zu notebook that is equipped with random access memory (RAM) 8gb, why only 4gb detected? Anyone know why?
Then why graphics configure and graphics properties in the notebook unfortunately also can not open? Are there any significant issues? Anyone know the solution how? Please let me know
It sounds like you may a faulty DIMM (stick) in the notebook. Power down and unplug the notebook. Remove one of the memory sticks and power on again. Does it still detect 4 Gb or is it down to 0? Return the first DIMM to the notebook and repeat the process with the second DIMM.
Once you have isolated which DIMM is being detected and which is not, remove the non detected DIMM from the notebook and swap the detected DIMM into non detect DIMM's slot on the motherboard. Power on the system. Is it still detected? If so, then the DIMM you removed is faulty. If not, the slot on the motherboard is likely the issue.
It's possible that during this process you'll see 8 Gb of RAM again, in which case one of the DIMMs may simply not have been seated properly.