The D-Link DIR-868L is currently one of the fastest routers you can buy. The test results are excellent and the interface responds quickly compared to that of other brands. We really have to try hard to find a downside to this router, and then it's only the USB 3.0 port that doesn't achieve USB 3.0 transfer rates. All things considered, if you want the best performance, the D-Link DIR-868L is a router you want.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips