Upgrading RAM for laptop questions

I just got a good hand-me-down laptop from my sister and I'm working on it to optimize its performance since it isn't a bad laptop. But I got super limited funds. My desktop is top priority too and I have a few more pending upgrades to that.

My question for today is the laptop currently only has 4gb of PC3-10600S RAM of some manufacturer I am not familiar with.

RAM SPECS:
Hynix - 4GB 2Rx8 PC3-10600S-9-10-F2

It's made in korea too.

I'd like to upgrade and give the laptop 8gb of ram, just because I'd like it to have two sticks of RAM (O_O i think this laptop supports dual channel memory) I also am aiming for this since I think this is the cheapest form of upgrade one can get for a laptop.

I am however not sure if there are no issues with using a different brand of RAM. 10600S ram is PC1333 right? So I should be ok with getting the same frequency RAM and pair it with this one. Is that correct? I don't know how to find out if this ram is CL9 or 10 too... would there be an issue if what I bought was a different CL?

Honestly I haven't tried mixing and matching RAM module brands before. I would always get the same brand of ram.

Enlighten me please.

*EDIT : Its an HP Pavilion dv3 btw...
Edited by shogrran - 9/15/12 at 7:41am

I'm optimizing it. I will be needing the ram yes for a bit of photoshop and gaming on laptop.

One of the reasons I want to get a 2nd 4gb stick is because I'd like the ram to run at dual channel instead of single channel AND yet still be able to use the RAM stick that I already have. It's not really because I need 8gb on the laptop no. I just noticed that getting 2x2GB ram costs more than getting 1 stick of 1x4gb of RAM.

The reason I'm optimizing it is comparable to the reason some people over clock their system. It's not really because they notice the difference in speed. Its for some other reason entirely.

Hmm thanks for the reply.. but I'm not that keen on using that software. I just don't feel comfortable installing/running programs for that purpose. Now I know it might not be bloatware or things like that and crucial is a good company but I just tend to keep away from those programs.

I'd like to get that 1600 ram but I don't think this laptop supports it (or does it? I know **** about laptops honestly)

Besides as I mentioned above, I'd like to cut the optimization of this laptop to bare minimum. Since I already have one perfectly working 1333 4gb stick of ram, i just need another stick of 1333 4g of ram. I'm just wondering if that RAM could be of any brand. For example.... hynix and g.skill (gskill is quite common in my area) or hynix and some generic 4gb ram. All I'm trying to achieve right now with the laptop is to get it to run at dual channel. I don't want to hike up the frequency to 1600.

I plan on moving my 40GB solid state drive, currently on my desktop to this laptop. 40GB is super minimum and would probably just have basic programs and boot stuff in it but I won't really need much space. The laptop will be used for "mobile-boredom-kill". Besides I'll have the old (slightly damaged HDD of this laptop which I can convert to a mobile storage for movies and stuff.

A bit of a story regarding why this optimization is bare minimum --- I am a relatively new father and quite frankly now that I have a daughter and wife, there are times they require me to travel, go to the province to ferry my daughter to the grandparents, and I"m thinking soon there'll be PTA meetings and principal's office summons for misbehavior. There's already a lot of times I've been waiting in line for something for a very long time and I always thought I could be at home with the internet. LOL. In short... my old life of me superglued in front of a desktop is just over. So being mobile's going to help kill the boredom. I initially had plans on just selling this laptop and getting a PSvita or something. But that would be a waste of a good laptop I guess.