What is the bottleneck in my system?
AMD Phenom™ II X4 840 3.2GHz w/ 2MB Cache
Asus M4A78LT-M LE w/ DualDDR3 1333, 7.1 Audio, Radeon HD 3000, Gigabit Lan, Hybrid CrossFireX
Patriot Gamer 2 Series, Division 2 Edition DDR3 4GB (2 x 2GB) PC3-10666 Enhanced Latency Kit
Seagate 1TB Barracuda 7200.12 SATA II w/ 32MB Cache
HIS Radeon HD 6850 1GB GDDR5 PCI-E w/ Dual DVI, HDMI, DisplayPort
Corsair CX600 600W Power Supply
Im guessing it would be the memory, but i just want to get opinions. Just for performance for games and such. Thanks guys