Solution
1 stick will work but you will not be using the most out of your processor as they have either dual or quad channel memory controllers
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Deleted member 217926

Guest
It actually depends on your hardware. Some motherboards have problems with 8GB sticks. But assuming your hardware will handle it, Alvine is correct in that you will lose the advantage of dual channel and 1 stick will be around 5% slower than running 2 matched sticks.
 
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Deleted member 217926

Guest
Yeah you will lose the advantage of dual channel. That will mean a ~5% performance hit. It should run fine with an 8GB stick though. Some boards don't do well with 8GB sticks. A 2 x 4GB kit is your best option though.
 
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Deleted member 217926

Guest
Probably not but 2 x 4GB kits are generally cheaper than single 8GB sticks and 4GB sticks are generally timed lower ( faster ) as well and why would you lose 5% in performance you don't have to lose? So there is no real reason to buy a single 8GB stick. If you later wanted to add another 8GB it can be hard to get mismatched 8GB sticks to work with each other too.

$42

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231428

$46 if your stuck on Corsair for some reason. The GSkill is just as good and cheaper.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820233186

Either kit will fit under an aftermarket cooler.