According to the HP specs as well as info on crucial.com, the TS only supports up to 4 gigs. However, it being a 64bit system tells me otherwise.
The current configuration uses SODIMM type (laptop) memory modules. Mine came configured with 4 gigs of 800mHz memory.
While memory is dropping in price, I still don't want to experiment with putting in two 4 gig sticks of memory...cash is a bit tight now...to see IF it works.

David

http://i99.photobucket.com/albums/l299/xz550rj/HPMagicGiveaway.jpg

Woohoo! I won my Touchsmart!

The 816 motherboard only supports up to 4 gig. No point in trying more than that.

Be aware that Vista uses RAM for more than just running programs. It preloads other things into memory as it sees fit, based on how you use the system. That may be contributing to the 90% memory usage, depending on where you've seen that number.

So even if you were to put 8 gig into a machine that had support for it, Vista might fill it all up and use it as "cache" to speed up performace.

Future models of HP TouchSmart (after the IQ 816) may support up to 8 gig. If so, the specs would mention it.

Be aware that the amount of free memory shown by Windows will be impacted by the Vista Kernel usage of Superfetch and caching:

http://technet.microsoft.com/en-us/magazine/2007.03.vistakernel.aspx

I think the result of this is if your system has been up for a while and you've run a few apps, you can expect your free memory to be a low number because the disk cache will use all available "free" memory.

According to this link http://www.memorystock.com/memory/HewlettPackardTouchSmart3001020.html

it should be possible to upgrade to 2 x 4G = 8 G of RAM

Can anyone confirm this? Running 64 bit really makes this a valid upgrade!

Thanks

//Casperse