Memory speed drops to 2133MHZ when another 2400MHZ RAM is added.

[Harsh2612]

Hi,
I bought a laptop that has 2400 MHZ speed RAM Module.
I installed a second 8GB 2400MHZ ram module. now it has 16GB Memory.

However, the MAX Speed of both RAMS dropped to 2133MHZ.

But when I was using only one RAM module at a time it was 2400MHZ .
I checked with the RAM modules both of them say Max speed as 2400 MHZ in the HP Diagnostic tool.

But when I put both Modules together the RAM Speed drops to 2133 MHZ for both slots according to the HP diagnostic tool.

What could be the issue?
How can I get both RAMS to work at 2400MHZ when putting together.??

[praveen196]

@Harsh2612 Welcome to HP Community!

I understand that the Memory speed drops to 2133MHZ when another 2400MHZ RAM is added.

HP doesn't recommend using CPU-z or any such 3rd party applications to analyze system performance as it may not be accurate.

The validated RAM speed for your system is DDR4 2400. DDR4 3200 is default at 2133 unless you have XMP in the BIOS settings. If you do not see XMP in the settings and a new BIOS does not add that additional setting than you will continue to run at 2133.

Keep us posted,

If you would like to thank us for our efforts to help you, 

Give us a virtual high-five by clicking the 'Thumbs Up' icon below, followed by clicking on the "Accept as solution" on this post, 

Have a great day!

[Huffer]

The second module you installed is performance or gaming memory...Kingston HyperX Fury. It is designed to run at a lower latency than the standard OEM memory. HP notebooks generally do not work well with such memory. They are designed to run on standard stock OEM memory modules. In this case I believe that additional module has caused the system to downclock the memory to keep stability. If you added a different DDR4-2400 module the same as the original you would see 2400 speed out of the memory. 

[Harsh2612]

Well in that case, can you tell me how can I enable XMP mode in the bios.

I can't access the advance bios setting, they are either blocked or something.

Second RAM module support XMP mode. and if I could just enable it and clock the module to 2400MHZ, then both the RAM modules would run at 2400MHZ in the dual-channel without any performance issue.

[Huffer · Accepted solution]

And if wishes were horses then beggars would ride. That is the point. The computer is not set up to work with overclockable components. It is a consumer laptop and the BIOS are very simple in order to contain warranty issues users are only provided the very most basic options. 

[Harsh2612]

If I cant clock my modules to 2400MHZ, then I certainly hope that there isn't very much of a performance difference in 2400 and 2133MHZ.

Because I definitely don't want to pay for another module and get a downgrade in performance.