After i tested my ram with memtest i have 2gb usable

shousha said:

i was at the bios and i couldnt find remapping

It may not be supported.

The system memory that is reported in the System Information dialog box in Windows Vista is less than you expect if 4 GB of RAM is installed

Take a read on that.

The instances I have seen on the net about the same type of problem refer to the msconfig setting Zigsag3143 mentions. Since you say the boxes are not checked, maybe try checking the memory box and set it to a number around 3GB, reboot and see what happens. Then uncheck the box and reboot again.

All I can think is that a flag has been set to reserve the memory for some reason or something is wrong with one of your sticks. Maybe checking and unchecking the box would reset the flag.

Swapping the slots on the motherboard might help, if you can do that. Make sure the system is unplugged and ground yourself on the case before touching the memory.

shousha said:

i was at the bios and i couldnt find remapping

Some MOBO's have a memory setting for installations. Usually it cuts the amount of memory used during an install. check your BIOS for that.

Saltgrass said:

The instances I have seen on the net about the same type of problem refer to the msconfig setting Zigsag3143 mentions. Since you say the boxes are not checked, maybe try checking the memory box and set it to a number around 3GB, reboot and see what happens. Then uncheck the box and reboot again.

All I can think is that a flag has been set to reserve the memory for some reason or something is wrong with one of your sticks. Maybe checking and unchecking the box would reset the flag.

Swapping the slots on the motherboard might help, if you can do that. Make sure the system is unplugged and ground yourself on the case before touching the memory.

@saltgrass. Absolutely. Nice post. +rep

Still havent responded to where you are seeing the max memory and avail memory. In task manager, BIOS, etc?

Ken

no they see 2gb now

do you think if i bought new ram the problem will be solved ?

Most bioses also have an option for a quick boot or an extended one. During an extended one, the memory is tested and the total amount shown. If that number is different from the Windows one, it might be a clue to the problem.

i found out my ram is fine its my motherboard slots is not working now i am going to change it tomorrow i am not going to use memtest again. thanks alot for ur help :)