I purchased a Killer Wireless-N to replaced the Intel 2230 that my Y500 came with. So I ran some quick tests, on the 5-ghz and 2.4-ghz bands using speed test and my NAS. 5-ghz Speed Test Ping 25 ms Download 26.16 mbps Upload 5.37 mbps NAS Download 12 mbps Upload 6 mbps 2.4-ghz Speed Test Ping 25 ms Download 15.97 mbps Upload 5.22 mbps NAS Download 3 mbps Upload 1 mbps Ethernet Speed Test Ping 15 ms Download 27.35 mbps Upload 5.41 mbps NAS Download 9.1 mbps Upload 15.2 mbps All in all the Killer so far seems like a very good card, adding only 10 ms of ping when compared to Ethernet. I will probably update this post as I collect real world observations.