Internet Working Very Badly

Hello, I installed Mac OS X El Capitan 10.11 and I have the TP LINK WN8200ND Working with "Wireless Network Utility v2.0.2 and Driver Version v1028" when I run a test on the Mac the ping is "70 - 120" Download speed "1.5 - 2mbps" and upload "0.5mpbs" and on Windows7 I have ping "40-50" Download speed "13 - 15mbps" and upload speed "3.5 - 4.5mbps" Please help!! I want my internet working normal.
thanks