nonem91

If it has a pcie slot ( which it does) 
It should be fine.

If one stick is a lower frequency 
Both will run at the speed of the slowest stick 
As for cas latency , different cas latency can work 
But I would recommend looking for a stick with the same cas latency just to be safe

12800U means it's unbuffered non ecc 
Ecc : error checking and that's present usually on servers 
Buffer : a long story

Theoretically 
I don't see why you cant.

I’ve never heard of ecc being used on a wintel laptop so they’re both probably U anyway.  The only laptop I ever saw that has ecc in it was an old Solaris monstrosity from he 90’s

They are both ddr3 ? 
Or is one ddr3l? 
Different voltages ( ddr3 being 1.5 and ddr3l being 1.35 ) should in theory work 
But I can't guarantee it 

yes both ddr3
ddr3L, a shop that sells close to my house
ddr3 pc12800U, the store is far from my house
 
ok thanks for answer sir, i take pc12800U. but i 1 more time to hunting with same spec ram i have now

The System Power U9 is much better. 
If your computer supports a standard ATX PSU then it should fit.

Looks like it doesn't use one so your good 

You can run different timings, yes. The motherboard will make them all run at the same speeds (whatever is the slower of the two, that how they will all run). As long as its DDR3, and the speed is the same, it should work

The mobo *should* do it all automatically. I have never had to manually adjust things to get RAM that didn't match to work.

ok, thanks a lot for help me sir

thanks for help bro
 
thansk for help bro
 
final ask, my mobo support auto set sped and timing or not sir?
if canot, how to set sped and timing, and what timing for my pc??
when setting the timing whether the ram turns in pairs, or directly plug the ram into 2 directly? ( sory bad typing google translete )

Dont have to be the same size. it has to have same speed (mhz) and same latency (cl)
1650 super has 8pin power connector. if your psu doent have that it will not work. your cpu bottlenecks the 1650 S hugely but it will still work.
you coul yes.
 
probably it cant run the 1650 super. 1650 super is terrible value anyway since you can get rx 580 with same price and rx 580 performs better.
you could go with gtx 1650 (non super) since it doesnt need power form your psu.