Does RAM sticks have to match for dual channel?

To run any memory in dual channel all you need to do is install the memory in matched pairs. When I say “matched pairs” it means that you need to match the memory speed, CL timing and same type. Also you may need same size and same voltage memory.

Can I combine 2 RAM with different MHz?

You can use memory modules of different speeds as long as they are faster than those specified for your computer. It is recommended to use modules of the same speed as those already installed in your system. For example, for a DDR2 667MHz system you could add 800MHz modules, they will run at the 667 speed.

What happens if you mix and match RAM?

There’s a prevailing misconception you cannot use different RAM sizes together or that you cannot mix RAM brands. The answer is Yes, you can mix RAM sticks and RAM sizes and even different RAM speeds—but mixing and matching RAM modules isn’t the best for system performance.

Can different RAM channels run at different speeds?

No, it is imposible. Both RAM sticks should have the same size and the same bus speed in dual channel mode. Computers may switch to single channel mode if two RAM stisks are not same size. The motherboard may proper the bus speed of both of RAM sticks to a acceptable bus speed if both RAM stick is not same bus speed.

Can I use 1066 and 1600 RAM together?

So the answer is that 1600 Mhz memory modules may not work in a slot that supports only upto 1066 Mhz. However the 1333 Mhz RAM worked.

What happens if you put 3200MHz RAM in 2666MHz motherboard?

Dependent on the BIOS you will not even be able to run the RAM at 3200mhz but at the default of 2666mhz so it should work just fine, if it lets you use different speeds use one that is compatible with your RAM. Yes, as long as the motherboard is DDR4 compatible.

What happens if you put faster RAM than supported?

Your computer will work just fine if you install the faster RAM. It will simply run at the slower 1333Mhz speed. For example, if your motherboard supports a maximum of 16GB but it can’t handle RAM sticks larger than 4GB, you’ll need to install four 4GB sticks instead of two 8GB sticks.