inquiring for upgrade

[Ahmed Zuma]

so i have a 4gb hyper x fury black khx1600c10d3/8g
which is making me wonder for 2 things
1-is this part number bugged?or is it supposed to be a part of a 2x4 8gb ram bundle?
2-can someone tell me the market name for this brand cause i want to buy another 4gb next to it?

 

[Subhra133]

HyperX HX316C10FBK2/8 is a kit of two 512M x 64-bit (4GB)DDR3-1600 CL10 SDRAM (Synchronous DRAM) 1Rx8 memory
modules, based on eight 512M x 8-bit DDR3 FBGA components per module. Total kit capacity is 8GB.
Market Name:-Kingston HyperX FURY 8GB 1600MHz DDR3 CL10 DIMM
Link to buy:- http://www.amazon.com/Kingston-HyperX-FURY-1600MHz-DDR3/dp/B00J8E92M6
choose from various colours