"When it comes to online gaming performance the Bigfoot Killer 2100 didn't hurt system performance and in a couple of the games we tested with it slightly improved our ping times. We noticed less than a 5% improvement in latency across the board for online gaming and to some you might feel this doesn't justify the $85 shipped cost of the Killer 2100, but others might see this as an advantage. When it comes to Local Area Network (LAN) gaming we noticed that the Killer 2100 really helped performance and cut the average latency in Battlefield Bad Company 2..."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips