I'm running Windows 7 x64 Ultimate edition. I had an old Wireless card - Linksys WMP54GS - which was having problems with dropping the network connection and high pings. The chipset is supposedly Ra-link 2500. I ordered a Rosewill RNX-N300 because that was supposed to work on x64 bit systems (which I assumed was the problem). The chipset is Ra-Link 2860+2820. The new card is still dropping, and has high latencies (3,000ms+) when it does connect. I downloaded the newest drivers - v1.5.1 from their website to no avail. I have emailed Rosewill but have not received a response as of yet. I have a laptop with Windows 7 x64 home edition which has no problem connecting to the same wireless router. Anyone have any ideas? Thanks for the help!