Mixed up two kits of RAM, which stick from which kit?

XistenZ

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Jan 19, 2014
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I'm looking into a build where two 4x4GB kits is used. It's acting up, not always booting correctly and occasional freeze. Anyway, I'm not after tips of how to troubleshoot but I'm interested in how to tell from the sticks, which ones comes from the same kit as they probably got mixed up?

Some kits, like from Corsair have a number on every stick so you can tell if it's in a series or not (two sticks might be labeled as "10023096" and "10023097", so you know they're a lovely couple). These sticks from Kingston however, is, for me atleast, impossible to tell.

The model for both kits is "HX426C15FBK4/16".

The system is stable when I only have 4 sticks in quad-channel, so I'm assuming these two kits don't play nice, so it looks like we'll have to settle for "only" 16GB and I want it to be as correct as possible.
 

Ra_V_en

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Jan 17, 2014
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I'm confused right now.
Do you have 4x4 GB sticks already and want to put another 4?
Which X99 mobo is it?
You can use cpu-z as said before to check the ram model also AIDA64 can show you the same information.

Mixing up sticks is possible and they don't have to be paired, but logically the more of them you have the more possible issues if one is underperforming.
Generally you read the latency from the worst stick and set manually it into the bios (common denominator way), otherwise some more manual adjustment might be required to get it stable.
 

XistenZ

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When I have all 8 sticks (combined from the 2 4-stick kits) the system is unreliable. When I use only 4 sticks everything works fine.
I know the RAM model, CL, voltage etcetera, it's all specified on the sticks. What I don't know is how Kingston labels the sticks so that you know which kit they came from.

Background fact that might not be common knowledge: why you use kits instead of mixing single sticks is because the sticks in the kits are guaranteed to work together. I don't really know why this is, but that's why you shouldn't mix single sticks with eachother and use kits instead.
 

XistenZ

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I contacted Kingston about it, and what I'm looking for is apparently what's called a "Work Order Number". They work similiar to how Corsair do it, except it doesn't have to be a complete series, but similiar. One of the kits I have ranges from 518-523 and the other was 662-667.

Yeay.