How to check if DDR4 2400 is working on B150 Chipset

[gx_saurav]

I recently purchased Core i5 7500 CPU + Gigabyte B150M-D3H motherboard + G.Skill Ripjaws DDR4 2400 MHz RAM (XMP 2.0) @ 1.2v.

As I read online, it seems B150 chipset supports a maximum of DDR3 2133 MHz only while B250 Chipset support DDR4 2400 if CPU is Kaby Lake.

However, in BIOS I have an option to change RAM frequency to 2400 MHz via XMP 2.0 profile. So I set it to XMP 2.0 profile and now Speccy shows my RAM running at JEDEC 1200 MHz (2400 effective).

How do I verify that my RAM is indeed running at 2400 MHz? Or, even if I set RAM to XMP Profile, will it still effectively run at 2133 MHz?

I cannot change my motherboard at this time so how much performance I will be losing by not going with B250 chipset based motherboard and using DDR4 @ 2400 Mhz officially?

 

[ch33zw1z]

cpu-z

 

[gx_saurav]

What should I look for in CPU - Z?

 

[ch33zw1z]

memory tab, it reads out the frequency

 

[Bouowmx]

Alternatively, there is HWiNFO system summary for Windows.

My memory is currently running at 1066 MHz, or 2133 MT/s, although I installed 2400 MT/s modules.

My intuition says putting an Intel Kaby Lake processor in a 100-series chipset will allow 2400 MT/s, but please confirm my intuition.

 

[gx_saurav]

This is what CPU-Z says for me. So I think it is working at 2400 MHz indeed

http://imgur.com/a/uHW7D

HWinfo also says the same. 1200 MHz.

This is my RAM http://www.gskill.com/en/product/f4-2400c15d-8gvr