Question Mixing and matching memory modules: Two sets of 2 vs one set of 4 memory modules

Oct 28, 2019
25
0
30
0
I am wondering, if there is some performance and/or compatibility issue or difference between use of 2 sets of 2 memory modules and/or one set of 4 memory modules.

To be more specific, my motherboard is the ASUS Prime X299-Deluxe II (LGA2066, Intel Core X-Series), the processor is the Intel Intel i9-9900X (X-series), and the memory sets I am considering are:
  • Corsair Vengeance LPX 32GB (4x8GB) DDR4 DRAM 3200MHz C16 Memory Kit [CMK32GX4M4B3200C16], one set of 4, or
  • Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 3200MHz C16 Memory Kit [CMK16GX4M2B3200C16], two sets of 2.
Buying two sets of 2 memory modules is significantly cheaper, which makes me wondering if there is some catch in regards to performance and/or compatibility.

Both memory kits are listed on the Qualified Vendor's List (QVL) for the selected motherboard, however a very first line of this document says:
Do not combine DIMMs from multiple kits - even ones of the same make and model. Mixing and matching DIMMs can result in failure to boot.
Is this a correct statement? What if someone wants to upgrade system, let's say from 16GB to 32GB, or what if I will want to upgrade my 32GB to 64GB later on? I cannot buy another same memory kit and be safe to use such memory modules together with those already installed before? Please advise and share your experience, knowledge and thoughts.
 
Oct 28, 2019
25
0
30
0
Generally speaking it is pot luck as to whether sticks from different packets will play nicely together, if sold as a set they'll work, if not sold as a set they might or might not work.
What are the odds to buy two sets in one order and to have them from different packets?
 

13thmonkey

Titan
Moderator
15.54%, seriously no idea. It'll work and you'll be happy, it'll work after a lot of fiddling with timings and you'll be content at having beaten the problem or it won't work after a lot of fiddling with timings and you be frustrated. What's your time worth? How many hours are you willing to put into it before the extra $30 seems like a good deal? How many times are you going to go through a bios update and sit there thinking 'I hope it works and I haven't got to do that all over again'.
 
Oct 28, 2019
25
0
30
0
15.54%, seriously no idea. It'll work and you'll be happy, it'll work after a lot of fiddling with timings and you'll be content at having beaten the problem or it won't work after a lot of fiddling with timings and you be frustrated. What's your time worth? How many hours are you willing to put into it before the extra $30 seems like a good deal? How many times are you going to go through a bios update and sit there thinking 'I hope it works and I haven't got to do that all over again'.
Understood. Thanks.
 

ASK THE COMMUNITY

TRENDING THREADS