then corsair xms 3 is the best one for its price its a 1600 mhz ram with heat spreader too and its not so much big that can take space for big cpu cooler or u can get an normal 1333mhz corsair 2x 4gb ram corsair provide lifetime warranty in some country 10 yrs warranty too its a good ram grab it
Corsair's Vengeance ram is the most popular among gamers today. It's fast, reliable, and inexpensive when compared to other brands.
corsair vengeance is good ram but not that much we expected more it could be trouble for some big cpu cooler too so the corsair xms 3 is still the winner in cpu clearance and same speed as corsair vengeance
My recamend is fill all slots dont see capacity. see mhz in board and ram.Reason mhz is the key to achive speed. if board support 1600mhz u insert 1333mhz its waste because not get full speed of ram slot. if board support 1333mhz u insert 1600mhz its also waste of money (1333mhz ram is cheaper than 1600mhz)also u not utilise full speed of ram. (4x2Gb 1600mhz=6400mhz =6.4ghz) vs (2x8Gb 1600=3200mhz=3.2ghz).
Also my recamend is Buy "TRANSCEND" ram .reason other manufacturers give only 1year warenty but transcend give "lifetime warenty" so no need to warry about problems. Then cost "no more dealer and distributer " because anyone can "buy directly in TRANSCEND.COM" so cost lower then other.
ur Mobo support 2100mhz ram so buy transcend axe ram 2000mhz oc enabled or 2100mhz oc enabled rams .x2 or x4.