Ram upgrade "NEED FAST ANSWER"

[IDVK]

Hi,last question.

Can i mix rams? Now i have one stick ram "Centon 2 GB PC2-6400 DDR2-800 800 MHz "

but my laptop support 4gb so i need another one, so can you tell me is this another stick gonna work?

"Crucial 2GB, DDR2 PC2-6400, DDR2-800" ???

[Huffer]

Yes you can mix modules of the same speed. It may or may not run in dual channel mode, but it will work in the sense that you will have 4 gigs recognized assuming you have a 64 bit version of Windows. 

[IDVK]

But this crucial ram will work yes? They specs are same

[Huffer · Accepted solution]

I thought I said that. Yes it will work. 

[IDVK]

Ok,thank you but still i will buy 4x2 two sticks with one brand. Pay less but get 100% dual chanell support , on ebay 4x2 kit is cheaper then in my country 2x1 ram 😄

[Huffer]

A pair of  4 gig DDR2 laptop modules is very expensive, I thought. You did not ask me whether the laptop can take 8 gigs total. There are 2 slots and I am not sure if the max is 4 gigs or 8 gigs but you seem to know what you are doing. 

[IDVK]

Model is Compaq presario cq62-210sy. Almost all websites saying that 4 gigs total,but "Crucial" website saying that 8 gigs total. So i dont know maybe i just upgrade it to 4 gigs,maybe i know what im doing,also once i builded a pc but right now im taking a big risk because i dont wanna make a mistake. ;/ (Bad English)

[Huffer]

Whoa hold the boat. Here is the Manual:

Service Manual

It says you have DDR3 memory not DDR2. But then again, your Celeron processor is not listed. Have you inspected the actual installed memory to be sure it is DDR2? I mean if DDR2 is in there it cannot use DDR3. 

Specs say DDR2:

http://support.hp.com/us-en/product/Compaq-Presario-CQ62-Notebook-PC-series/4149939/model/4226538/do...

Processor is T3300 which is compatible with the GL40 or PM45 chipset more commonly paired with DDR2 memory. I am almost certain it maxes at 4 gigs. 

[IDVK]

Yes,i checked yesterday, removed rams to make sure there is ddr2. Mine is T3300 withe the GL40 so i will upgrade it to 4gigs.