justme42 :
Well my internet is only 80mbps so i dont think there is much sense of a 5ghz band.My ususal ping is 40-50 and all of a sudden it spikes to 1100,then drops to 300-500
5GHz band does not mean that your transferring data at 5,000mbs. It's just the frequency that your wifi works on. The 2.4Ghz band is severely congested by other devices (cordless phones, home security systems, baby monitors, neighbors wifi, neighbors cordless phone, etc..) which can all cause interference on that band with your wifi data.
For me at home I typically get 20-30mbs on the 2.4GHz band and 120mbs on the 5Ghz band with a 150mbs Internet connection.
Try speedtest .net to confirm your actual speed through your wifi adapter.