The main difference with the standard Z77A-GD65 is the Killer E2205 network chip. In our most recent large group test the GD65 already earned the Hardware.Info Silver Award in the category 'deluxe, but still affordable'. And like the Z77A-GD65, the new Gaming board made an excellent impression. However, the limited number of new features don't justify the higher price in our opinion. If you really want a KillerNic network card, then you should go for this MSI gaming motherboard, because it's a lot cheaper than the Gigabyte's special gaming Z77-board with the same chip.
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