Which RAM upgrade to buy/install on a compaq presario cq62

[itmom]

I would like to upgrade the RAM for my husbands Compaq Presario CQ62.  It currently has 2GB and I would like to increase it to 4GB. I am trying to determine the exact model so I can purchase the correct RAM upgrade.  I do not have the original box.  I do have the the product number information WQ778UA#ABA.  

[HaggisCat]

The easiest way to tell which RAM to get is to run this system scanner from Crucial.

 http://www.crucial.com/usa/en/systemscanner

 I checked you manual and it's not clear if you have DDR2 or DDR3, but here are screen shots of the difference.

 

 

 Try to match up the same speed and brand name, but it's not that important like it used to be.

 I'm guessing that you present one is 1066 Mhz, which is very common.

 Don't put something slower in there as it will "bottle neck" the faster stick. it will still work, but the RAM will slow to the lesser speed of the two sticks.

 You will have two slots and I am also guessing that one slot is being used with a 2GB stick rather then both slots being filled with 2, 1GB sticks.

 If you're want to know more there should be an HP part number right on the RAM ending in 001, if you give me that part number, I should be able to tell you exactly what it is.

You can also Google that part as well to find out.

 The biggest difference is DDR2 and DDR3 and as you can see the sockets are totally different, so that has to be correct.

 Also, according to your specs it will support 8GB, but 4 will be plenty. If you put in 8GB in there, you will have trouble finding an application to even put a dent in that much RAM.

 Anything that uses that much RAM will overload the processor, eg, gaming.

 http://support.hp.com/us-en/product/Compaq-Presario-CQ62-200-Notebook-PC-series/4149939/model/422103...