Kernel latency for handling the Network traffic

Hi, I am building the router based on linux kernel. The hardware details are below, 2 - 64 bit quad core processor (3Ghz core). RAM- 24GB RAM. PCI express slot- connected with Quad Port 100Mbps Ethernet adapter -2. (so total 8 ethernet interfaces) I just want to calculate the maximum traffic the router can handle..?. The maximum traffic could be, also 8 ports(100Mbps) * 2 directions = 1600Mbps. Can this system(kernel + hardware) handle this much traffic. (Assume the best case)? I think, There is calculation to identify the packet processing time in linux kernel (kernel & hw cpu freq). I am not aware of this. Can some one help me to identify this. Thanks Suresh.