Help with Laptop RAM

[Ram Satesh]

Good day tech gurus of LTT, I have a few questions regarding RAM. I have an old laptop and am thinking of upgrading the RAM. I'll have screenshots attached below from CPU-Z, etc. 

 

I am thinking of upgrading my RAM to 16 GB. As you can see, my everyday workflow with google chrome and a few other programs open is already taking up most of the RAM. What I would like to know is the speed/frequency of the RAM. 

 

On Task Manager, it says my RAM is 1600 Mhz, but on CPU-Z, it says each RAM is 800 Mhz, so does that mean the total speed is 800 x 2 = 1600? And if this is the case, can I buy 2 x 8GB DDR3 1600Mhz RAM sticks and this will increase my total speed to 3200 Mhz? 

Thank you in advance.

 

[KangUsapEmenq]

It's kind of true, but your current memory, both of it, are actually 1600 MHz. Dual-channeling halves the speed and why it's 800 MHz on CPU-Z and why it's twice on the Task Manager, here it is why. I actually curious either why would it happen so, glad to actually know by stumbling to the topic lol.

[Prodigy_Smit]

31 minutes ago, Ram Satesh said:

so does that mean the total speed is 800 x 2 = 1600

Kinda. The 2 RAM sticks are DDR meaning Dual Rank so 800x2 would be 1600mhz but that does not add across 2 RAM sticks. 

36 minutes ago, Ram Satesh said:

can I buy 2 x 8GB DDR3 1600Mhz RAM sticks and this will increase my total speed to 3200 Mhz? 

The total speed will not change.

[Ram Satesh]

11 minutes ago, dhannemon13 said:

It's kind of true, but your current memory, both of it, are actually 1600 MHz. Dual-channeling halves the speed and why it's 800 MHz on CPU-Z and why it's twice on the Task Manager, here it is why. I actually curious either why would it happen so, glad to actually know by stumbling to the topic lol.

I see, I get the picture now. So basically I will only need to upgrade 1 stick. That will save me money. Thank you for the info. 

[AzzaNezz]

You should look at your manufacturer page of how much ram can your system support.

For instance some laptops i wanted to buy can support maximum of 12 gb,some can do like mine 16 gb.

Check just so you dont  waste money for nothing

[Ram Satesh]

13 minutes ago, Smit Devrukhkar said:

Kinda. The 2 RAM sticks are DDR meaning Dual Rank so 800x2 would be 1600mhz but that does not add across 2 RAM sticks. 

The total speed will not change.

Thank you!