So I go it about 4 months ago, everything worked fine, download/upload was good (1/mbit both ways), after about 2 months, I started noticing my internet being slow, so I did a speed test and download went down to 300/kbit, however, upload is pretty the same. After spending a few days figuring out and trying different things, I came to conclusion that it is the router only, direct cable to PC and Mac works great. The only thing that helped me 'solve' this problem for like a week is by lowering RTS and Fragmentation by 40, however, today the connection started dying again. I have the WRT54GC v 2.0 ad running the latest firmware as stated by Linksys site. I've seen hundreds of similar threads all over the internet, but none of them have any solution. If anyone knows how to fix this, I will buy you a beer, or two via PayPal.