Need Help Upgrading RAM

[Guilherme26]

I am upgrading my father DELL laptop with a new RAM chip, from 4Gb to 8Gb. I want to double the current amount by adding a second chip equal to the first, but I can't find out the RAM frequency, to be more precise I have two conflinting values:

• Task manager and the prompt command "wmic memorychip get speed" give: 2400MHz but;
• Dell support system give: 2133MHz.

My question is: Which value should I trust?

 

edit:typo

[Turretgaming]

the system is rated for 2133 but the ram might be clocked at 2400 in the bios and if it stuck thats great cause the ram is over clocked technically but get the same as whats in the system now and in the bios make sure u set 2133 and if it doesnt stick clear the cmos and set it too 2133 and either way you get more ram just at a lower speed than you have now. 

[wojtepanik]

33 minutes ago, Guilherme26 said:

I am upgrading my father DELL laptop with a new RAM chip, from 4Gb to 8Gb. I want to double the current amount by adding a second chip equal to the first, but I can't find out the RAM frequency, to be more precise I have two conflinting values:

• Task manager and the prompt command "wmic memorychip get speed" give: 2400MHz but;
• Dell support system give: 2133MHz.

My question is: Which value should I trust?

 

edit:typo

get 2400mhz, it will be fine, worst case it will downclock to match other, best case dual 2400mhz sticks

[Guilherme26]

1 hour ago, Turretgaming said:

the system is rated for 2133 but the ram might be clocked at 2400 in the bios and if it stuck thats great cause the ram is over clocked technically but get the same as whats in the system now and in the bios make sure u set 2133 and if it doesnt stick clear the cmos and set it too 2133 and either way you get more ram just at a lower speed than you have now. 

 

1 hour ago, wojtepanik said:

get 2400mhz, it will be fine, worst case it will downclock to match other, best case dual 2400mhz sticks

Thank you guys, I gonna try both.