XMP Across same Modules with different size

[Myself11]

Hey folks!

So I saw this question has been asked multiple times however, no answer seemed to include what I was looking for.

I'm currently having a set of Quad Channel DDR4 16GB (4x4096MB) Vengeance LPX red DDR4-2133 DIMM CL13-15-15-28 Quad Kit.

Now I am running XMP on them (to get a better CL rating).

Recently I've been thinking about buying additional RAM (the MSI X99A SLI Plus thankfully has 8 Slots). Now, I am deciding weather getting the same kit again, or getting the 32GB Kit (for a total of 48GB RAM), speed, CL, would be all the same.

To get to my question finally:
1: Would I be able to use XMP across those modules?
2: Would 48GB actually be a sensible number (considering that its usually 2^n)?

By reading the other threads I figured out that the ram will run on the lowest sticks performance, which wouldn't be relevant considering only the size matters. (Correct me if I'm wrong on that).

Thanks in advance

 

[liberty610]

When dealing with ram, it's always best to buy a full kit that is meant to work together in that same kit. You very well could mix and match ram, people have done it. The problem is, you're not guaranteed to get the best performance or the most stability out of it.

The reason why it is always best to buy ram in the same kit is, because you will know for certain that all the sticks are going to work in tandem together properly. Even if you where to buy 2 different kits of the same exact model of ram, their timings may not be the same. If you use all the ram in the same kit, they where tested and designed to work best together.

I just upgraded my ram from a 16gb kit to a 32gb kit for my video editing. I plan on going to 64gb in the near future, but I will probably sell off this 32gb kit and buy a 64gb kit instead of mixing 2 32gb kits of different nature together. When you mix and match ram kits, you very well could have no issues, but it's just better to buy kits that where packaged together.

 

[Tradesman1]

When dealing with ram, it's always best to buy a full kit that is meant to work together in that same kit. You very well could mix and match ram, people have done it. The problem is, you're not guaranteed to get the best performance or the most stability out of it.

The reason why it is always best to buy ram in the same kit is, because you will know for certain that all the sticks are going to work in tandem together properly. Even if you where to buy 2 different kits of the same exact model of ram, their timings may not be the same. If you use all the ram in the same kit, they where tested and designed to work best together.

I just upgraded my ram from a 16gb kit to a 32gb kit for my video editing. I plan on going to 64gb in the near future, but I will probably sell off this 32gb kit and buy a 64gb kit instead of mixing 2 32gb kits of different nature together. When you mix and match ram kits, you very well could have no issues, but it's just better to buy kits that where packaged together.

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+1 No guarantees when 'adding' a package of DRAM - it may not even play at all with the original package