adding 2x8gb & 2x4gb ram to get 24gb

[Josevidal1970]

Hello,
The motherboard I have is a Giga-Byte GA-Z97-SLI
I have two 8 gb ram sticks: 2400 MHZ DDR3 1.65v
and
I also have two 4 gb ram sticks: 1600 MHZ DDR3 1,5v

I had them working at first, I had the 8gigers in the first 2 slots and the 4gigers in the last 2 slots going from left to right.

Now I have only 16gb, the second and fourth slot are only being used. Is there a manual on how to properly place ram of different gb? thanks
Joe

 

[Calvin7]

No, in fact, adding together different types of RAM can cause the system not to boot or to be unable to operate at rated specifications.

 

[Josevidal1970]

Calvin7
Why did it work before?

 

[Josevidal1970]

No, in fact, adding together different types of RAM can cause the system not to boot or to be unable to operate at rated specifications.

then why did it work before?

 

[Josevidal1970]

I think you are gonna be right. I'll invest in 2x8gb instead, thnx

 

[Tradesman1]

Try the 8GB sticks in slots 1-3 boot to BIOS and set to 1600 9-9-9-25 and the DRAM voltage to 1.56, save exit and shut down, then try adding the the 4GBs to slots 2-4 - if the all play you'll have 24GB all running in dual channel mode

 

[Josevidal1970]

Try the 8GB sticks in slots 1-3 boot to BIOS and set to 1600 9-9-9-25 and the DRAM voltage to 1.56, save exit and shut down, then try adding the the 4GBs to slots 2-4 - if the all play you'll have 24GB all running in dual channel mode

from left to right:
2x8gb & 2x4gb. Working perfectly.
I read that slot #1 starts on the right.
Its working now,

 

[Josevidal1970]

Try the 8GB sticks in slots 1-3 boot to BIOS and set to 1600 9-9-9-25 and the DRAM voltage to 1.56, save exit and shut down, then try adding the the 4GBs to slots 2-4 - if the all play you'll have 24GB all running in dual channel mode

Thanks Tradesman1

 

[Tradesman1]

No worries 😉

 

[brent flynn]

Try the 8GB sticks in slots 1-3 boot to BIOS and set to 1600 9-9-9-25 and the DRAM voltage to 1.56, save exit and shut down, then try adding the the 4GBs to slots 2-4 - if the all play you'll have 24GB all running in dual channel mode

Okay I have literally the same question but would the answer be different if its 2133MHZ?at 11 11 11 27? same ram and voltage just different GBS