Windows 10: What will be the ram channel in my Lenovo T450 Laptop?

I have a Laptop which had 4GB RAM first so it had single channel memory mode now my laptop has 2 slots only 1 is filled so i put 1 more same speed same specs but 8GB RAM stick so i want to know that will i have dual channel memory mode for 4gb ram + 8gb ram or do i need 4gb + 4gb? Will it effect performance?

:)

 

Convert SSD from MBR to GPT on Lenovo T450S laptop

To understand better what you have, please post a Disk Manager image (full window, expanded columns).
How to Post a Screenshot of Disk Management


The M.2 drive was used as a disk cache. With a SSD it is quite useless.

There is a new BIOS for the T450. Suggest you update it.
BIOS Update (Utility & Bootable CD) for Windows 10 (64-bit), 8.1, 7 (32-bit, 64-bit) - ThinkPad T450, T450s - Lenovo Support GB

 

Convert SSD from MBR to GPT on Lenovo T450S laptop

 

Lenovo T450S laptop docking station issue

I am having difficulty utilizing a docking station with my Lenovo T450s laptop. I purchased the laptop in 2016 and it is running Windows 10. At the time of purchase I also bought a Lenovo docking station. At the suggestion of an IT person, I recently purchased a "Plugable USB 3.0" docking station.

The issue I am having now with both docking stations is that my second monitor does not get detected and only works when I connect directly to the laptop and it does not transfer the wired internet signal from the docking station to the laptop. The signal is fine when I connect directly to the laptop. All of the USB ports on the laptop are USB 3.0.

I was under the impression that I could plug the power for the laptop and one cable from the docking station and would be good to go. The printers connected through the docking stations work fine. I take my laptop home with me every day from work. Any suggestions to try?