1. Corsair TW3X4G1333C9A PC3-10666 4GB Kit 9-9-9-24 240pin DIMM
2. Ripjaws F3-10666CL7D-4GBRH PC3-10666 4GB Kit 7-7-7-21 240pin DIMM
i dont know which 1 should i take and have more capability for gaming. their price just about the same.
and i've been to their website saying about ram no.1 and no.3 is Corsair ultra-high performance DDR3 Memory for AMD Phenom II Processors.
my processor is AMD phenom II x4 955.
3. Corsair TW3X4G1600C9D PC3-12800 4GB Kit 9-9-9-24 240pin DIMM
Well I am not sure if you would choose 1600Mhz RAM
But I do like the G.Skill Trident 2000Mhz DDR3 Extreme Performance RAM
But you have to make sure that your motherboard also supports a model type of RAM.
Some people don't read the memory support list for their motherboards. So if I was you right now I would
check to see if any of he RAM are supported before buying because you can make a big mistake.