Network problem, do i need a network card?

[redwood36]

Hello, I've got a serious network issue that is slowing down my connection to new websites. Frequently web browsers are very slow to connect to a new web page. The connection goes in and out so the first webpage i will load will be slow, then the second one is very slow, or visa versa. im running on a Asus P6T deluxe v2 motherboard and I have corrected the drivers as per a thread on this website. My network does work, but very inconsistently. Do i need to get a network card, or is this purely a software issue. Is there anyway I can troubleshoot the issue? I've also disabled IPv6. Here is my current network information.

 

 

Automatic:

 

Active Location: Yes

Services:

Ethernet:

Type: Ethernet

BSD Device Name: en0

Hardware (MAC) Address: 00:26:18:52:5f:8e

IPv4:

Configuration Method: DHCP

Proxies:

Exceptions List: *.local, 169.254/16

FTP Passive Mode: Yes

Ethernet 2:

Type: Ethernet

BSD Device Name: en1

Hardware (MAC) Address: 00:26:18:52:5f:8d

IPv4:

Configuration Method: DHCP

Proxies:

Exceptions List: *.local, 169.254/16

FTP Passive Mode: Yes

FireWire:

Type: FireWire

BSD Device Name: fw0

Hardware (MAC) Address: 00:1e:8c:00:01:f3:68:a9

IPv4:

Configuration Method: DHCP

IPv6:

Configuration Method: Automatic

Proxies:

Exceptions List: *.local, 169.254/16

FTP Passive Mode: Yes