MY RAM is not showing up ??Please help me?

Hello guys..I have Acer Laptop with 3 GB RAM . I want to Upgrade my RAM. So i open the back of my Laptop and Remove the 1 GB RAM and Put the 4 GB RAM. But when after that when i reboot my Laptop. It was only showing 2 GB RAM not the additional RAM that I connected. After that I remove the 4 GB RAM Slot and put back my 1 GB. then also again it was only showing the 2 GB..Nothing is working. ..Do i need to upgrade Bios ??

sort by: active | newest | oldest
hxr.keltz4 years ago
You may be running a 32-bit machine. If you are, then you will se a maximum of 3 GB RAM. In windows, you can usually check by right clicking on My Computer, and clicking on Properties.
karan260390 (author)  hxr.keltz4 years ago
No it's a 64-bit machine..
It may also happen if you are running a 32-bit operating system. First of all, though, as mpilchfamily said, check the manufacturer's website for a BIOS update, and if that doesn't work for you, then you can always run a utility such as memtest86+ ( It will tell you whether or not your RAM is operating correctly.
Even if it is 64-bit, the motherboard may be limited to 4 GB.

Also, a 32-bit machine will use a maximum of just under 4 GB... not 3... with everything that gets stored in the OS, you may only see 3.5-3.75, but you should see more than 3 if you have 4 GB and the motherboard supports it.
bwrussell4 years ago
The RAM may not be seated properly. You really have to push it in tight. Did you check the max RAM your mobo will take? It's possible it's limited to 4GB total.
karan260390 (author)  bwrussell4 years ago
This time i fit the RAM properly and then after when i reboot my computer. it showing nothing.. The screen is all blank..
I just solved a similar problem with one of my old LAN computers last night. Somehow between shutdowns either one of the memory sticks or memory slots died. The computer would try to boot, fail, try again, stay on but didn't do anything besides keep the power supply running. Try removing any RAM from the slot you were swapping and booting with only the remaining 2 GB in place.
I haven't had enough time to test if it's a bad module or if something went wrong with the slot.
What model is it?

Have you looked to see if there is a bios update available for your system?
karan260390 (author)  mpilchfamily4 years ago
How can i check for bios update..
Go to the acer web site and look up the model you have and see if there is a bios update. Check the version number with the one listed when you go intom the bios on the machine.