M2n68-la max ram

According to the specs: http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&dlc=d..., you can use one or two gb ddr2 sticks in pc4200, pc5300, or pc6400. The disclamer is for windows 32 bit operating systems, which only recognize up to 4 gb of ram (3.25 gb average with onboard video). If you try to force a ddr3 stick into one of these slots, and you will ruin the slot and possible the board. I would pull one stick out and match the ram brand. Get a 2x2 gb kit for windows 32 bit operating systems, and sell the old sticks on craigslist to help pay for the upgrade. 4 gb is plenty; ddr2 is too expensive to get 8 gb (prices are going up after the holiday sales). It is possible but not guaranteed that 6 gb will work if both pairs of slots have matching pairs of ram (2x2 gb in one pair, 2x1 gb in the other) but if the new ram doesn't work with the old ram, sell the old ram.

i have a ddr2 sticks in it now . one 2 gb and one 1 gb for a total of 3gb i am running a 64 bit system. (Win 7) can i not get one $gb and replace the 1gb to make a 6 gb? what you said above still does not tell me what the max ram the board can have.
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&dlc=d...
same link you gave me tells me that it will only hold 2-2gb sticks but at 64bit can have up to 8gb of ram. and 32 bit can only have 4gb. how can you get 8 gb of ram out of 2-2gb sticks?

i have a ddr2 sticks in it now . one 2 gb and one 1 gb for a total of 3gb i am running a 64 bit system. (Win 7) can i not get one {4gb} and replace the 1gb to make a 6 gb? what you said above still does not tell me what the max ram the board can have.

sorry typo

Yes it does: 2 gb per slot for a total of 8 gb. My suggestion was simply to save money. But as you say, there's no guarantee that 6 gb will work; depends on the board bios and how similar the pairs of ram sticks are. Good motherboard manuals will list the possible ram configurations, but hp doesn't give you a manual, just a specs sheet.

if you look at the board on the same page you posted you will see that there is only 2 slots for ram so how can you get 8gb out of 2 slots of 2gb ram,? trust me i am not tring to be hard but it makes no sence to me ... is there a way to add ram slots to a mother board?

My link to your board has a picture of a board with 2 blue and 2 black ram slots. If it's wrong, double check your model number and I'll look again for a link. Your link is the same as mine. I had that board once, at least one version of it. If you remove your old ram and get (4) matching 2 gb sticks, you can run with 8 gb using windows 7 64 bit. But I don't suggest it due to the high cost. To sumarize, leave the 2x1 gb pair alone (removing the 1 gb single or (512mb x 2 pair) and try adding a second pair of 2x2 gb. Sell the leftover stick or keep it for testing.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01...
is the correct link only 2 blue slots that is what is throwing me off .

to tell the truth i am not sure what type it is all i have on the board that i am looking at i can make sence of is the id number of M2n68-la...
do not see the other subtypes on the board that i can see

Your first link showed 4 ram slots same as mine. Sorry for the confusion.

ok found the answer to my max ram question.. you where right 2 gb per slot for a max of 4 gb. i have a 1 gb and a 2gb 6400 mhz card right now is it worth it to upgrade to 2 sticks of 2gb 8500 mhz? will the one gb extra and the mhz upgrade help improve my system performance? or do i just need to save the 75 bucks and invest it in a new computer and vid card? after incomtax

3 gb is enough; wait for a ddr3 motherboard; don't get stuck with too much ddr2.