My sister's laptop doesn't have a netgear network card too.
The router is on the second floor and my sister's laptop is able of getting 300 mbps from the basement too.
What does enabling and disabling 802.11d in my network card do?
EDIT: I think i found out that my network card doesn't work with WPA2-PSK [AES], could that be 1 of the problem?
Could well be! The nic card is NetGear while the cable modem is Motorola. It works like a champ! as you would expect being hardwired.
With some routers however they do tend to work best with the same brand nic card or adapter requiring a match. This was being looked at as one possible explaination for differences you were seeing there.
The second item you just found out about the card not supporting certain things like WPA2-PSK [AES] is definitely a concern especially you are using the AES type of encryption. The advice is to look for a better alternative or review The Cable Guy - July 2010 page to look thongs over in case you don't have something configured correctly as a side thought. The Cable Guy - July 2010
Quote