BIOS & Windows Can’t see –

Did a PSU unit change, and right by where I had to pull out the 24 pin of the Motherboard and snap back the new connection, is where my Memory Module dual Chan sits
I gently unsnapped the retaining Clips and pull out the Memory Stick that is closet to the 24 pin connection to have more room to access the 24 pin connection.
After I completed the PSU unit changed, when I booted my DELL up, my BIOS & Windows – only register 4 GB,even though I have installed 8 GB of Physical Memory.
Running Windows 8.1 Pro + 64 Bit machine
Things that I have tried:
Re – swapped the Memory sticks, making sure they are seated properly.
Tried accessing the BIOS [ AMBIOS] to locate >> “Memory Remapping” to see whether it is Enable – Cannot locate in AMBIOS.
Msconfig >> Boot >> Advance Option >> “Max Memory ” value is zero.
Reset the BIOS – by popping out the Battery, waited 10 mins, before Installing it back.
Any more Suggestions, Thanks.
Answer #1
Try one stick by itself….
Does it get recognized in all the different slots ?
Try the other stick by itself..
Does it get recognized in all the different slots ?
This should determine if you have a faulty stick or a faulty slot.
(If you strike a faulty combination, it won’t boot at all – no memory recognized)
The contacts on memory sticks can be cleaned with contact cleaner, isopropyl alcohol or rubbed with a pencil eraser.
And you can blow out the slots with compressed air or use cleaner/alcohol with a small stiff brush..
Answer #2
Try one stick by itself....
Does it get recognized in all the different slots ?
Try the other stick by itself..
Does it get recognized in all the different slots.
I have tried that, my system won’t let me Boot – with ONLY 1 stick in the Memory Slots. It gives out a Beeping sound, and the moment I put in the other stick, it will Boot. I know you are using a process of elimination.
Answer #3
On the RAM sticks it should have a label with the RAM timings, voltage and speed in MHz, note them down and check they are set correctly in BIOS (under DRAM timings(just the first 4), DRAM voltage and speed). Follow ‘s suggestion and try them in different slots as I can’t see that all sticks and slots would go bad at the same time.
Answer #4
my system won't let me Boot - with ONLY 1 stick in the Memory Slots.
Have you closed the clips on the other slots before you powered it up?
Answer #5
my system won't let me Boot - with ONLY 1 stick in the Memory Slots.
Have you closed the clips on the other slots before you powered it up?
No, I have not done anny testing of Ram before, and BTW, I cannot access the DRAM Configuration in BIOS, I think the – Aptio – AMBIOS is really ~ Lovely ~ BIOS system , with comes with the DELL MO.
Detect the “Missing” 4 GB Memory using Belarc Advisor.


Answer #6
So DIMM2 is not working with any of the rams , and not the ram stick itself ? if so take a close look at the DIMM2 slot and see if it has something in it … like dirt,dust or anything that could have fall in it while you were setting up the new PSU.
Answer #7
Using a process of Elimination suggested, these are the results I tested on individual Memory with Individual Memory Chans or sockets.
– Starting with what I got with I had installed now, I assume that the Memory stick on DIMM #1 is – Good and obviously DIMM #1 socket is good too. [ indicated by Belarc advisor on the screenshot]
– Popped out the Memory Stick from DIMM #2, and snapped back the retaining clicks and Rebooted
>>> Booted well, and obviously shows 4 GB in System.
– Cleaned the gold contacts of the removed Memory stick from DIMM #2, and air blasted the memory chan as well. Reinstalled by making sure it is seated well [ the clips snapped back in place, when pressure is applied to the Memory stick ] – This step is obviously to eliminate the possibility that the Contacts or the chans are “dirty”.
>>> Rebooted, Same result showing 4 GB.
– Nest, Pop out the Memory stick from DIMM #2 , making sure I made a indication on the Memory to identified it, not to mix up with the one on DIMM #!. Popped out the memory stick from DIMM #1 and installed it on DIMM #2, and snapped back the clicks on DIMM #1 and Rebooted.
>> Won’t boot, Beeping noise heard. That elimiated the Memory stick that I removed is Good and I confirmed that in the Next step.
– Air blasted The Memory Chan, making no dust accumulated , and I installed the Original Memory stick that I cleaned from DIMM #2 , and installed it on DIMM #1. Rebooted well,and it still shows 4 GB in System.
Conclusion on Test : DIMM #2 is Bad.
Can I stick in a 8 GB RAM on DIMM #1, since DIMM #2 is NOT available?
Answer #8
take a very good look with a magnifier at the gold contacts on DIMM socket #2. either a pin was bent, or there’s a bad solder connection which you can’t see, since it may be a 4 layer board.
Answer #9
take a very good look with a magnifier at the gold contacts on DIMM socket #2. either a pin was bent, or there's a bad solder connection which you can't see, since it may be a 4 layer board.
Thanks for the suggestion, but it is NOT really “gold” in color, like Plack layered.