Will a 1866MHz memory work on my PC?

[Vigeme]

This is my first time building my own system. I'm entirely new to this build-your-own-pc thing, since my parent's just buy me computers that is already sold as a whole package. But now that I'm earning my own money, I wish to start building my own computer.

This system is intended for use mainly for office work and research, a bit of gaming (civilization and red alert just to pass time - no hardcore gaming)

Here are the specs of my system. I bought them individually at our local computer store since I have to manage and allocate my money sparingly in order to complete a full system. These are the things that my money can buy.

Processor : Intel Core i3 4170 3.70Ghz
Motherboard : Gigabyte GA-B85M-HD3
Video Card : Palit GT 740 1GB DDR5 128bit OC
Power supply : Seasonic S2 520watts
Hard Disk : Seagate 250gb 7200

I am now down to choosing the memory, on gigabytes website, it says that my motherboard "Support for DDR3 1600/1333 MHz memory modules".

My question is will a KINGSTON 4GB HYPER-X FURY 1866MHz work on my motherboard?
If not what other memory can I use?
And also, is it ok to use 2 memory that is sold individually? The store where I bought my components doesn't have memory that is sold in bundle (2 pieces).
Also, is it better to use 2 pieces of memory (like 2 x 4GB) or 1 piece of 8GB?

Looking forward to your answers. Thanks a lot

 

[Tradesman1]

The mobo supports up to 1600 as does the CPU, so the 1866 should run at 1600. 2x4GB provides for dual channel that can be a 10-15% performance increase over single channel and if getting two sticks best in a single package - there's no guarantee 2 single sticks will even play together (and yes, even if they are the same exact model - no guarantees)

 

[Vigeme]

The mobo supports up to 1600 as does the CPU, so the 1866 should run at 1600. 2x4GB provides for dual channel that can be a 10-15% performance increase over single channel and if getting two sticks best in a single package - there's no guarantee 2 single sticks will even play together (and yes, even if they are the same exact model - no guarantees)

Thank you for your response, just an additional question, would it be much better to just buy a ram that is labeled as a 1600/1333MHz rather than the 1866MHz? Because in my understanding, the 1866MHz will work however it will have to throttle down to 1600MHz, so I'm looking at something that I would buy but won't be able to use in its full potential.

Cheers