Thanks, but I found another info that this model supports 8 GB RAM, that's why I'm not sure what to do.
I thought the same as you (4 GB max), but then found a website that had different info and even different versions of the same M51Va model, here:
http://prodrcd.com.au/12163-asus-m51va-ap016c.html
It says: Max RAM Supported 8 GB
There are other models that support 4 GB RAM, like these two:
http://prodrcd.com.au/12951-asus-m51a.html
http://prodrcd.com.au/12164-asus-m51vr.html
That's why I'm not sure what's the catch.
Also, now I'm not sure how make sure which model I have actually, and here is why: it is not my computer and friends asked me for advice; the computer label reads M51V and I think I somehow identified it online as M51Va (with this "a" in the end), but I forgot how I did it back then (it was sometimes last year, but friends revived that topic now, as they finally decidet to upgrade the machine and use it for a bit more). So I think I identified it as M51Va, but it's label says only M51V, and Asus website has M51Va and M51Vr, but not M51V.
Any advice how to decide which model it REALLY is, just to make sure, and then where to confirm this RAM capacity question?
Thanks again.
EDIT:
p.s. It may be that we are talking about this one:
http://www.asus.com/au/News/qiwJRuF4PRSZT3zu
(Sold in Australia.)
MOdel: M51VA AS045G
When I modify this address
http://prodrcd.com.au/12163-asus-m51va-ap016c.html to make it reflect model change (AS045G), and try this address:
http://prodrcd.com.au/12163-asus-m51va-as045g.html,
I get info about ASUS M51Va AP016C model and, again, that it supports 8 GB RAM.