My pc consists of 2 slots of DDR2 240 pin 533mhz memory, until yesterday I had 2 x 512mb to make 1gb total. I then brought an ebay single 2gb ram chip from 'Hong Kong', it works perfectly if I remove both the other chips, but will not work if I insert one of the 512mb chips into the 1 spare free slot. To ideally make a total of 2.5gb ram.
Is it possible I have reached the maximum ram capacity for the motherboard (It was only purchased in September 07), if so it seems quite low (at 2gb), I would have expected probably 4gb max. All the chips I have are 533mhz pc 4200 chips so should be compatible, I wonder if the Hong Kong chip needs another Hong Kong chip to work and 'doesn't like my uk supplied existing modules'! I was hoping to insert another 2gb into the second bank in the near future.
Any thoughts would be greatly appreciated.
Before anyone gives me the standard 'visit crucial.com' I have tried this and it will not recognise my motherboard/configuration correctly.
Download and install Everest Home Free click here. This is a handy tool that provides a lot of information about your PC.
When you run it you will see various options, if you click on `Computer` and `Summary` you will see your motherboard details there. Or you could provide details of the PC itself as it is a Fujitsu-Siemens item it will have a model number which can be traced.
I feel sure Halmer is correct on the subject of fitting DDR RAM in pairs. But it may also be the case that the motherboard is limited to the total amount of RAM it can support and the 2GB exceeds its capacity anyway.
What OS are you running? I ask because I think there is a limit of 2GB RAM with XP anyway.