It will bottleneck, but that is a minor amount. You would also need to saturate the bus to hit that ceiling. Which may happen in memory intensive applications.
This is common amongst AM2/AM2+/AM3/AM3+ systems. While cross compatible you are limited by the memory and PCI-E bus the board supports.
That chip isn't on the supported CPU list, though it does support the FX8300 which is also rated at 5200mt/s, so you should definitely get the latest BIOS before making the attempt.