Donald_72 :
Well darn just bought the wrong ram. Thanks everyone.
Return it and buy a 4x kit of 2GB if you can still find it to get 8GB. Regarding compatibility, in my experience, older RAM like DDR2 is more lenient in how compatible it is outside of the motherboard qualified vendor list (QVL) for memory. Another option is to buy two kits of 2x 2GB of the exact same model.
Be prepared however: depending on where you live, it may be VERY expensive. Older RAM can actually increase in price/value due to limited supply as people try and upgrade older rigs. I speak from experience trying to upgrade an 8-year old E8400 Core 2 Duo build to 8GB.