Different brand but same speed RAM in laptop - Only single channel

[Drake5]

I added an 8GB 3200Mhz DDR4 RAM module along side the current 8GB 3200Mhz DDR4 RAM module in my laptop, they are different brands though. From what I read online before hand different branded RAM should still run as dual channel as long as the speed is the same however that's not the case for me since CPU-z says the RAM is running in single channel mode

Can anyone shed some light on this for me please?

Cheers

 

[Tetras]

Your laptop only has two slots, right?

What else is different between the sticks?

It could just be a misread from cpu-z.

 

[Drake5]

Your laptop only has two slots, right?

What else is different between the sticks?

It could just be a misread from cpu-z.

The laptop only has 2 slots

This is the stick that I added today

This is the stick that came with the laptop

 

[Tetras]

They look close enough, can you show the mainboard and memory tabs?

 

[Drake5]

They look close enough, can you show the mainboard and memory tabs?

Cheers

 

[Drake5]

Apparently I'm told that 2 x 64bit indicates dual channel mode so I think all is good

 

[Dg834man]

Your miss reading it, it is running dual channel 2 x 64bit, was just in the process of writing that ranks is something separate has a smaller impact on performance.

 

[Jamin280672]

Apparently I'm told that 2 x 64bit indicates dual channel mode so I think all is good

On a different note, I don't know if you can configure it in the bios, but you are in 2:1 mode, your uncore is half your ram speed.

 

[Drake5]

On a different note, I don't know if you can configure it in the bios, but you are in 2:1 mode, your uncore is half your ram speed.

I'm not sure what that means, do I need to change a setting somewhere?

 

[robinbanks]

As other have said looks to be duel channel. What's this laptops used for?

 

[ooStevo]

Apparently I'm told that 2 x 64bit indicates dual channel mode so I think all is good

DDR memory is 'double pumped'
So it is reading correct. DDR = Double data rate. Whatever you see in cpu-z times it by 2. Is it still saying single channel though? Maybe different timings and different voltage between the two sticks not playing well together?

 

[Jamin280672]

I'm not sure what that means, do I need to change a setting somewhere?

It means that the memory controller in your CPU is running at half of the speed of your DRAM Frequency, it might just be a limitation of a mobile CPU though

 

[Drake5]

It means that the memory controller in your CPU is running at half of the speed of your DRAM Frequency, it might just be a limitation of a mobile CPU though

Is this something I should be concerned about/try to fix ?

 

[mickyflinn]

Is this something I should be concerned about/try to fix ?

No there's no issue.

As above it's double data ram so you have to double the frequency to get the correct frequency.

 

[Jamin280672]

Is this something I should be concerned about/try to fix ?

If you have the option to change memclock=uclk in your bios to 1:1 then change it, if not then dont worry about it, you will find that in CPU-Z screenshot they will both read 1594mhz (1600mhz), regardless of your ram doubling up the data rate (DDR double data rate), not the frequency, DDR and frequency are 2 different things.

Your RAM speed to 1594mhz (1600mhz), which makes your Date Rate 3188 (3200MT/s) but your uncore is 796mhz half of your ram speed, this puts you in 2:1 mode, this is 1 cycle of your ram for every 2 cycles of your memory controller.

This is what 1:1 looks like, and even if you do double up my ram speed to 6400MT/s (DDR) its still 1:1 because the true frequency is still 3200mhz, its the data transfer rate that changes / doubles, (MHz vs MT/s Megatransfers)