im not a computer nerd, can i replace DDR4-2400 • CL=17 • NON-ECC • UDIMM • 288-pin • 1.2V • 1Rx8 • PC4-19200 with this

Well you could but what I didn't know at first was that your PC will not automatically run the ram at the 3200 speed.... you have to go into the BIOS and make some changes in there such that the PC "sees" and uses the higher speed on the RAM.

As I found out the hard way this also has the potential to be kind of "iffy" .. there are definitely a lot of people who do this with no problem and their PC behaves itself .. but there are other people who do this and it results in system instability where the PC starts having problems (I had a heart stopping moment where I pushed the power button a few days after setting my PC to recognize the higher speed ram and the PC wouldn't start ! .. unplugging and replugging the PC and turning the switch on the power supply on and off did the trick but it was scary)... so it's sort of a "do it at your own risk sort of thing."

You mentioned you were not a computer nerd.. you do have to be careful when you make changes in the BIOS, if you do the wrong thing the entire PC can start having problems.. having said that I had to teach myself all this stuff and if you do enough internet research, write down all your current BIOS settings so you can go back in there and change them back to the original settings if need be and start making changes you can learn a lot about the PC and use it to it's fullest potential.

If you can find the model number for your motherboard (do you still have the invoice for the motherboard? Or is it a preassembled PC you bought from say Dell or some other computer manufacturer?) you can look up the product manual for it and see what it has to say about RAM and BIOS.

Two online forums I've found to be super helpful are Hardware Canucks and Tom's Hardware forums but you'd still need to get a hold of that manual and do the research on it before posting there ... alternately if the PC came preassembled it might have a blurb in the product manual about putting RAM in there but personally without having a product manual specifically for the motherboard (which is normally not the case with a preassembled PC) it would make me nervous swapping out the ram in a preassembled PC. But I'm paranoid by nature I'm sure other people do it all the time (but you are running a risk in my opinion).

I have a dell xpx8900 brought in 2015its stock, meaning i didn't add anything in it,i use 98% of the time watching YouTube,it has 8 gb ram,i just want to upgrade the memory,because when i FF a video it lags,i was thinking upgrade the ram or video card ,but the cards i seen cost as much as the computer$600,I'm mid 60s don't game or do any high-end stuff,just stream YouTube,thanks for your time and effort