The performance hit that Kingston's conservative latency settings make on the Plug and Play High Performance Memory 4GB modules is shown here against the benchmarks of the 4GB Corsair Dominator memory.
The lower latency kit, however, will require some Bios tweakery to get it running at that rated speed, as well as a little extra cash for the privilege.
SiSoft Sandra - GB/s (Bigger is better)
Kingston HyperX PnP 4GB 1600MHz: 19.65
Corsair Vengeance 8GB 1600MHz: 20.75
Corsair Dominator 4GB 1600MHz: 21.18
World in Conflict - FPS (Bigger is better)
Kingston HyperX PnP 4GB 1600MHz: 101fps
Corsair Vengeance 8GB 1600MHz: 104fps
Corsair Dominator 4GB 1600MHz: 105fps