Hello Everyone

I have a four year old laptop and I added 8GB memory to give me a total of 16GB hoping to be able to use DaVinci Resolve. My laptop uses DDR4 PC-17000 2400. I ordered it by those specs and installed it. The laptop performance was improved, but I started getting very slow startups and one instance when it would not awake from sleep (which never happened before.) Other than that, everything is OK and speed is greatly improved.

However, I got to checking and discovered that what I was sent and installed was DDR4 PC-17000 2133. I'm assuming that the only downside is that the original bank will be underclocked to the lower speed. Is that correct or am I likely to experience other issues?

Many thanks for any help. By the way, even after upgrading to double the RAM, Resolve still will not run because this laptop uses shared memory for graphics. Oh well....

Bob

No, the new RAM modules will be overclocked to 2400 as the BIOS self-test tests the first (lowest address) memory module only for speed. When that accepts 2400, it will be used for all memory modules.

Thank you for your reply. My main question is am I going to harm anything or experience any erratic behaviour (except for what I mentioned, there hasn't been any bad behaviour)

Thanks again

Bob

In previous versions of ram, DDR2/DDR3, if you put a slower stick in, it would run at the slower speed.
(I'm not sure the above is correct.)

This is what I had always thought, but I could certainly be wrong. I am not even sure if DDR4 is the latest version. I don't follow tech that closely anymore. Like I mentioned before, I just really wanted to make sure it wasn't going to cause any harm or cause any other hardware performance issues. I am happy with speed improvement of the laptop now.

Thanks

Bob

It, of course, is dependant on how YOUR BIOS tests for speed of the memory modules, but at the university we had as a rule of thumb: put the slowest memory module(s) in the first slot(s). Adding higher speed modules never does harm, lower speed ones can lead to hanging of your system or loss of memory values as those memory modules may not be able to always handle the speed they are being used. Especially when successive accesses/writes are to the same module.

Thank you for your help. No Problems to any great degree, so I'll carry on until it does. If it does start causing issues, I will swap them out.