3gb ram only 1 gb is usable

aakashalex

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Oct 13, 2011
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18,510
Hello,
my system is showing 3gb of ram but only 1gb is usable. Can i use all 3gb of ram. I m using windows 7, core2 duo proc. 2.25ghz, and gt 520 graphic card. Thanks for ur time and help.
 
Welcome to Tom's Forum! :)

Define 'useable'?

Q - What MOBO?
Q - What RAM?
Q - What DIMM slots is the RAM installed in? e.g. CPU: | 1GB | 512MB | 1GB | 512MB |

Look at the Resource Monitor and provide the following:
1. Hardware Reserved?
2. Installed?
3. Total?
RM_7PRO6GB.gif
 
Okay so far I know the 2GB is turned-off by the BIOS.

What about the rest?

Q - What MOBO?
Q - What RAM?
Q - What DIMM slots is the RAM installed in? e.g. CPU: | 2GB | blank | 1GB | blank | ??
Q - What CPU?

CPU-z will identify MOBO {Mainboard tab}, RAM {SPD tab}, CPU {CPU tab} and LOOK at the MOBO for the DIMM slots.
CPUZ -> http://www.cpuid.com/softwares/cpu-z.html ; free and good App.

Try booting with ONLY the 2GB stick where the 1GB currently is i.e. Swap them.

Some older MOBO's require the SAME sizes per Channel. Also, if the memory Frequency, CAS Timings and/or Voltages are different this too will cause the BIOS to turn-off the DIMM slot(s) {RAM}.
 

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