What is the best chipset for data transfer speed

after my test, X58 chip set is the best chip set to make memory copy now.
for pageable memory
host to device: about 4.5GB/s
device to host:about 4GB/s

for pinned memory
host to device:aobut 5.7GB/s
device to host:about 5.4GB/s

Though its already very fast, is there any other chipset faster than it?
how about AMD AM3 ?
Its listed bandwidth is higher than Intel’s X58(+core i7 and ddr3).
Will it be faster then Intel’s chipset?