4GB RAM Suddenly decreased to 2.5GB RAM

Vanzha Holl

Reputable
May 8, 2014
10
0
4,510
Hello.
This week suddenly i had lag in all games i played (BF3/Splintercell Blacklist etc..) and today i found out that my ram suddenly decreased from 4gb (3.97GB Usable) to 2.5gb (2.49 Usable). and now i cannot play any games (Or play with 5 FPS!:fou:) In system it says that i have 4 gb ram but only 2.49gb usable but in taskmanager it says 2.5 gb but it also says 4GB DDR3 so i tought WTF!?
I dont know why and how this happened but i want my 3.97gb of usable ram back!
i played a little with msconfig (to disable some startup things) but i dont think thats the problem

Specs:
Proccesor: Intel(R) Core (TM) i3 CPU M380 @ 2.53 GHZ
Installed Ram: 4gb (2.49 GB USABLE)
System Type: 64Bit
AMD Mobility Radeon HD SERIES 5000
 
Solution
I'd start by going into the BIOS and resetting to default or preferably optimal settings. Try to note what the BIOS says regarding installed memory and that's more important for troubleshooting than what windows says.

The next step would probably be to remove all memory modules and try them individually in the DDR3_1 slot to determine which module is not working or working correctly. When you find the module that doesn't work or reports a different than actual size you can run Memtest86 (Free download) to test the module for errors. There's almost surely either a bad module or a controller issue.
I'd start by going into the BIOS and resetting to default or preferably optimal settings. Try to note what the BIOS says regarding installed memory and that's more important for troubleshooting than what windows says.

The next step would probably be to remove all memory modules and try them individually in the DDR3_1 slot to determine which module is not working or working correctly. When you find the module that doesn't work or reports a different than actual size you can run Memtest86 (Free download) to test the module for errors. There's almost surely either a bad module or a controller issue.
 
Solution