Macbook Internet Slow

For some reason my macbook's Internet connection either on a cable line or wireless both got slower. And I mean really SLOW. I just recently changed my ram to 4gb (OWC). I don't think this is the problem but I was wondering if someone else had a similar problem and know of anyway to fix this problem. Thanks.

I found a quick answer to my previous post here. I just added a few more DNS servers. You can just go to your network connection and add these numbers for more DNS server options:
# 208.67.222.222
# 208.67.220.220
# 199.166.28.10
# 199.166.31.3

Your DNS IP should be the IP of your gateway (router). The router in turn gets it's own from your ISP.

Hi, I had this problem before and tried using DNS servers 208.67.222.222 and 208.67.220.220 and it worked. However, the problem came back and those DNS server numbers doesn't seem to work anymore. I've tried using 4.2.2.1 and that didn't work. This slow internet is bugging the crap out of me. Any help would be much appreciated.