No it will likely not bottleneck at stock speeds. All machines technically have a bottleneck, it is the slowest component, so if your GPU is way more powerful than your CPU, the GPU can only give the CPU information as fast as it can take it. In that case, the CPU is the bottleneck. If the CPU is more powerful than the GPU, the CPU has more available capacity, and the GPU is the bottleneck. Ideally, all components will "balance" but as I said, there is always one component that will be slower than the others.