If you see any DDR3-2000 7-8-7, they're all using the same Elpida chip. And hence their insanely expensive price, $450+ for 2x3GB. They are made for competitive benching and will not be of benefit to gaming.
For you gaming you only need between 1333-1600 of timing 8-8-8 or lower. Those kits cost below $170.