Satellite L30-113 Memory Problem

Question

I have a Satellite L30-113 that is not reporting the correct
memory size.
The system was supplied with 512Mb and I have installed an additional 1Gb
Stick but for some reason windows is only reporting 896Mb installed, and the Graphics card
is using 128Mb. The BIOS is also reporting that only 896Mb of ram is installed.
When I run system Info for windows it only detects the 1GB module installed
although if i remove one memory module and have either the 512 or 1GB installed
it works fine.
I have also installed the latest BIOS and this doesn’t seam to
have had any affect.
Also both memory sticks have been tested in an other laptop so i know they both work.
Are there any issues with mixing memory sizes in these laptops or do the memory
sticks have to be matched sizes?
The OS is Windows XP Pro
*Extract from System Info For Windows*
*Property Value*
*+Memory:+ *Summary
+*Location:*+ System board or motherboard
*+Maximum Capacity:+* 1024 MBytes
+*Memory:*+ Slots 2
*+Error Correction+:* No
*+Name Physical:+* Memory Array
*+Use System:+* memory
*+Device Locator:+* J501
+*Capacity: *+1024 MBytes
*+Memory Type+:* DRAM
*+Data Width:+* 64 bits
*+Bank Label+:* Channel B0
*+Form Factor:+* DIMM
*+Total Width:+* 64
*+Type Detail:+* Synchronous
Many thanks
Matt Tyrrell

Answer 1

I don't agree, because usually L30 supports not only the same modules. One of my friends has 512mb Hynix and 1gb Kingmax in his L30 installed, and has no problem with it. There's a guy in another topic how uses 533mhz and 667mhz modules together, and he also has no problem. So I think you should choose the modules carefully and I recommend the same modules too, but it doesn't mean you couldn't use different modules in L30. Mostly you should care about the manufacturer, for example Kingmax, Kingston, Corsair, Samsung, Hynix could be a good choice. I'm sure there are another good brands too, but as I see usually there are no compatibility problems with these modules.