How to increase wireless speed?

[Arananthony]

I have a TPLINK 3800 pci wireless adapter that only goes up to 54 mbps my pc is one floor below my at&t router would a powerline or a pci ac adapter make it fatser?

[Noxxx]

if you are getting much less than what you bought from your ISP: 

Most reliable method is using an ethernet cable. 

Powerline may not always work, so buy one from a retailer with a return policy.

Other things you can try is to buy better (more expensive) wireless router and adapter

[SnafuPossum]

can you give us the model number of your router? either it only supports wireless g or is in a b/g "legacy" mode

[Arananthony]

http://www.att.com/equipment/accessory-details/?q_sku=sku5520238

[Arananthony]

I changed the settings to wpa2-aes from wpa-tkip and the cap increased to 130 mbps

[SnafuPossum]

If all the devices in your house accept that encryption system, I would keep it. The routers wifi throughput maxes out at 150mbps in a perfect situation so you are good and that is way more speed then att's internet speed it offers.