Mixing ram capacity

[zombajuice]

I have two kits of RAM one is a 32gb(2x16) the other is 16(2x8) for a total of 48 should I put the 32gb kit on one chanel and the 16gb on the second or should I do like one 16gb and one 8gb on the same chanel that way both channels would have the same capacity per channel or does it not matter 

[Dedayog]

13 minutes ago, zombajuice said:

I have two kits of RAM one is a 32gb(2x16) the other is 16(2x8) for a total of 48 should I put the 32gb kit on one chanel and the 16gb on the second or should I do like one 16gb and one 8gb on the same chanel that way both channels would have the same capacity per channel or does it not matter 

Put the kits in the same channel.  Both 16's in one channel, both 8's in the other.

[YoungBlade]

You should have the same capacity for each channel so that the RAM doesn't have to run in flex mode.

 

So installed 8, 16, 8, 16 or 16, 8, 16, 8 across the 4 slots. This is how I run my 48GB across 4 sticks. 

 

10 hours ago, Dedayog said:

Put the kits in the same channel.  Both 16's in one channel, both 8's in the other.

Why would you do that?

[Dedayog]

27 minutes ago, YoungBlade said:

You should have the same capacity for each channel so that the RAM doesn't have to run in flex mode.

 

So installed 8, 16, 8, 16 or 16, 8, 16, 8 across the 4 slots. This is how I run my 48GB across 4 sticks. 

 

Why would you do that?

I said the same thing you did.

 

Your layout puts the 32gb in one channel and the 16gb in another.

 

 

[YoungBlade]

15 minutes ago, Dedayog said:

I said the same thing you did.

 

Your layout puts the 32gb in one channel and the 16gb in another.

 

 

No it doesn't.

 

When you install 2 sticks, they go in OX-OX. This is because the first two slots are for one channel and the next two are for the other.

 

By going 8-16 + 8-16, this ensures that you are putting 24GB in each channel.

 

Think of it like this: if the 16GB sticks are in slots 2 and 4, then they are in different channels. This is how you install 2 sticks normally. So the remaining two slots must each be for a separate channel.

[Dedayog]

54 minutes ago, YoungBlade said:

No it doesn't.

 

When you install 2 sticks, they go in OX-OX. This is because the first two slots are for one channel and the next two are for the other.

 

By going 8-16 + 8-16, this ensures that you are putting 24GB in each channel.

 

Think of it like this: if the 16GB sticks are in slots 2 and 4, then they are in different channels. This is how you install 2 sticks normally. So the remaining two slots must each be for a separate channel.

So for my motherboard as an example...

 

 

I put a stick in A2 and B2 as per norm.  That is a dual channel... channel.  So you put the 2x16 in them, and the 2x8 in A1 and B1 for the other dual channel... channel.  Since a 4 slot board has 2x dual channel channels.

 

So you said to put them in 8-16-8-16, right?  "So installed 8, 16, 8, 16 or 16, 8, 16, 8 across the 4 slots."

 

So they are installed exact same, but you're saying I am incorrect as to what constitutes the channel?  or my understanding is flawed maybe?

 

But to me, the channels are 1 and 2, not A and B.

 

More info that may change my stance...

 

[YoungBlade]

27 minutes ago, Dedayog said:

So for my motherboard as an example...

 

 

I put a stick in A2 and B2 as per norm.  That is a dual channel... channel.  So you put the 2x16 in them, and the 2x8 in A1 and B1 for the other dual channel... channel.  Since a 4 slot board has 2x dual channel channels.

 

So you said to put them in 8-16-8-16, right?  "So installed 8, 16, 8, 16 or 16, 8, 16, 8 across the 4 slots."

 

So they are installed exact same, but you're saying I am incorrect as to what constitutes the channel?  or my understanding is flawed maybe?

 

But to me, the channels are 1 and 2, not A and B.

 

More info that may change my stance...

 

Yes, A and B are the channels, not 1 and 2.

 

A1 and A2 are slots for Channel A, and B1 and B2 are slots for Channel B. That's why 2 sticks should be installed spaced apart - so that you're guaranteed to get them installed in different channels.

 

Technically, you could actually install the two sticks in A2 and B1, and still get dual channel operation with the sticks next to each other, but some boards will refuse to boot if the RAM isn't installed in the expected order, so this isn't recommended. I've only ever seen it in practice on a board where a slot was damaged.

[KidKid]

13 hours ago, zombajuice said:

I have two kits of RAM one is a 32gb(2x16) the other is 16(2x8) for a total of 48 should I put the 32gb kit on one chanel and the 16gb on the second or should I do like one 16gb and one 8gb on the same chanel that way both channels would have the same capacity per channel or does it not matter 

Check this out!
 

 

[Pusbucket]

15 hours ago, Dedayog said:

Put the kits in the same channel.  Both 16's in one channel, both 8's in the other.

 

4 hours ago, YoungBlade said:

You should have the same capacity for each channel so that the RAM doesn't have to run in flex mode.

 

So installed 8, 16, 8, 16 or 16, 8, 16, 8 across the 4 slots. This is how I run my 48GB across 4 sticks. 

 

Why would you do that?

 

3 hours ago, Dedayog said:

I said the same thing you did.

 

Your layout puts the 32gb in one channel and the 16gb in another.

 

 

You guys are mixing "channels' with "banks"

 

Bank = A1 & A2 / B1 & B2  

Channel = A1 & B1 / A2 & B2  

[Pusbucket]

https://www.quora.com/Whats-the-difference-between-slot-bank-and-channel-in-a-motherboard

 

"A bank, is just a grouping of memory slots. It can vary depending on the board, but the one above is likely a single bank, with 4 slots. The gap between the middle slots, makes me think that this board may consider them 2 separate banks, with 2 slots each, but it is hard to say without seeing the BIOS or specs for that particular board.

A channel is a bus that is dedicated for data to travel from the CPU to the RAM modules. The image above (most likely) has 2 channels and they are differentiated by the colors. So the White slots are one memory channel and the Blue slots are a second memory channel."

[YoungBlade]

4 minutes ago, jmwhite33 said:

 

 

You guys are mixing "channels' with "banks"

 

Bank = A1 & A2 / B1 & B2  

Channel = A1 & B1 / A2 & B2  

No I am not.

 

You can see it right in the manual for that board. Channel A consists of Slot A1 and Slot A2. Channel B consists of Slot B1 and Slot B2.

 

If what you said here were true, then installing two sticks in A2 and B2 could not result in dual-channel operation because both sticks would be for the same channel.

[Pusbucket]

12 minutes ago, YoungBlade said:

No I am not.

 

You can see it right in the manual for that board. Channel A consists of Slot A1 and Slot A2. Channel B consists of Slot B1 and Slot B2.

 

If what you said here were true, then installing two sticks in A2 and B2 could not result in dual-channel operation because both sticks would be for the same channel.

again it's more confusion over what is a "channel" and a "bank"

actually the manual is technically incorrect in the terminology being used.

what it calls "channels" are technically "banks" as in a discrete group of ram slots.

A Channel is the actual BUS between the RAM and the CPU.

Now the terminology has shifted a bit with the term "channels" often being used interchangeably for both 

[YoungBlade]

3 minutes ago, jmwhite33 said:

again it's more confusion over what is a "channel" and a "bank"

actually the manual is technically incorrect in the terminology being used.

what it calls "channels" are technically "banks" as in a discrete group of ram slots.

A Channel is the actual BUS between the RAM and the CPU.

Now the terminology has shifted a bit with the term "channels" often being used interchangeably for both 

If A2 and B2 are wired to the same channel, then how do you get dual-channel operation when using those two slots?

[Pusbucket]

Just now, YoungBlade said:

If A2 and B2 are wired to the same channel, then how do you get dual-channel operation when using those two slots?

again, your misunderstanding.

what are being called "channels" technically are "banks" as in grouped RAM slots; group A and group B.

channels are technically the BUS interface between the memory and CPU.

that is why in order to get dual channel mode you need RAM installed in each BANK (A-B) in corresponding CHANNELS; I.E. slots A2 & B2

both "A" slots comprise a "bank", both "B" slots comprise a "bank"  slots A1 & B1 comprise  a "channel", slots A2 & B2 comprise a "channel"

As already stated, I think the confusion arises because the term "channel" is used interchangeably, with the term bank not being used as often.

[YoungBlade]

2 minutes ago, jmwhite33 said:

again, your misunderstanding.

what are being called "channels" technically are "banks" as in grouped RAM slots; group A and group B.

channels are technically the BUS interface between the memory and CPU.

that is why in order to get dual channel mode you need RAM installed in each BANK (A-B) in corresponding CHANNELS; I.E. slots A2 & B2

both "A" slots comprise a "bank", both "B" slots comprise a "bank"  slots A1 & B1 comprise  a "channel", slots A2 & B2 comprise a "channel"

As already stated, I think the confusion arises because the term "channel" is used interchangeably, with the term bank not being used as often.

Then why is it called "dual-channel" if you put the two sticks in the same channel?

 

It really sounds like you have this backwards.

[Pusbucket]

42 minutes ago, YoungBlade said:

Then why is it called "dual-channel" if you put the two sticks in the same channel?

 

It really sounds like you have this backwards.

ya know what, I am a little mixed up, but not completely wrong.

I'm thinking old school terminology and applying it to tech that isn't necessarily the same 

I guess what would comprise a "bank" the way I'm thinking would actually be slots A1 & B1 or A2 & B2. 

but then again, by one definition a "bank" is comprised of grouped RAM slots, so A slots are a "bank" and B slots are a "bank".

 

If my failing memory is accurate back in ancient times RAM was arranged in banks and you would have to fill a bank before using the next one.

A bank could be anywhere from 1 to 8 slots.

A dual-cpu 486 board I had once was 8 slots in 4 banks of 2 slots each.