Hi Jim,
Ah the SIS chipset strikes again, if it is look for a BIOS upgrade.
Also I would match the memory sticks esp. if dual channel. Check with the seller and get it changed.

>Hi Thomas,
>
>While I'm still worried and will do more checking, I am comforted by the following:
>
>1) POST does say 2048
>2) While System Information only reports "Tootal physical memory" as 1024 MB, it does report "Available physical memory" as 1.45 MB
>3) SiSoftware Sandra reports "Total physical meemory" as 2048MB and ""Free physical memory" as 1460MB
>
>On the other hand, "dual channel" is involved and the original memory was specifically dual channel while the added was not (though the seller did say it is, by Kingston's own info (which I did not see)).
>
>It feels like the stuff is in use, but of course that's very subjective.
>
>If I find anything else, I'll let you know.
>
>cheers and thanks
>
>PS for NeilMcD: (a) the BIOS did reset itself and I did have to twiddle, but mainly to do with boot drive), and (b) I did unplug power before delving into innards.
>Thanks to you too
>
>>Hi Jim,
>>
>>>I added 1GB to my system.
>>>At boot, POST shows 2048MB.
>>>But System Info" shows only 1024MB.
>>
>>Definitely weird. Step one: check in the BIOS that the system memory banks
>>are correctly defined / timings are ok - that SHOULD be automatic conversion,
>>but as some chip sets HAVE to reduce timings if fully loaded and sometimes
>>settings are tweaked manually, automatic changes can go haywire.
>>
>>Jot down the settings and either load slowest settings and re-optimize or
>>set the timings back manually after checking all banks are recognized.
>>
>>Another possible factor: on boards with a dual channel option
>>the banks should be filled with identical RAM. Perhaps even just the dual
>>channel setting/layout description is wrong for the current state of RAM.
>>(Hint: previously 1 GB of 2 dual cannel 512MB and still set that way,
>>trying to interleave the wrong channels and therefore accessing only 1 GB...)
>>
>>After that I'ld go for the memory checkers found on many "trouble shooting boot disks".
>>These often work either on DOS clones or linux variants if booted with the CD/DVD
>>in drive and give more information on recognized/tested RAM banks.
>>
>>I am pretty sure that the WINAPI routines are also used by the task manager,
>>so I'ld try booting into other OS to verify the HW before going against W2K/XP
>>memory checking.
>>
>>>Should I be worried?... Feels like I should be.
>>If your physical RAM is not recognized in the task manager,
>>I'ld set an evening off to check.
>>
>>pls. post the solution if you find one...
>>
>>regards
>>
>>thomas