I have 2 RAMs. one is 4GB 1600Mhz 2nd one is 2GB 1333MHz. But in task manager It shows RAM speed is 1333MHZ. What about the 16

amthedarkbeast

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Aug 28, 2017
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Processor i3 (2nd Gen) 3.3Ghz
Motherboard Gigabyte H61M-DS2
I have 2 RAMs. one is 4GB 1600Mhz 2nd one is 2GB 1333MHz. But in task manager It shows RAM speed is 1333MHZ. What about the 1600MHz?
 
Solution
The BIOS will automatically default to whatever the specs of the slowest DIMM are. They cannot be run at two different speeds.

BTW - it is not generally advisable to mix DIMMs of different densities or different speeds. Even mismatched sets with the same ratings don't always play nice together

HamBown81

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Aug 3, 2017
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The BIOS will automatically default to whatever the specs of the slowest DIMM are. They cannot be run at two different speeds.

BTW - it is not generally advisable to mix DIMMs of different densities or different speeds. Even mismatched sets with the same ratings don't always play nice together
 
Solution

HamBown81

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Aug 3, 2017
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I don't know if it is "useless" but it will not run at that speed with a slower DIMM in the other slot. I would say that the extra capacity is more important than the faster speed anyway.

Honestly, the difference between 1333 and 1600 MHz is not something that you would probably notice.