I bought this Alfa's adapter a few days ago during these days I've been searching around, reading, downloading/installing/uninstalling drivers, but no success, it is worse than my internal adapter, very noisy, signal level seems great, shows a lot of AP's but extremely slow browsing, extremely high packets lost rate, even my AP being less then 50feet from here...

I'm using a 4-7dbi antennas...
I've set txpower to 30dbm since it's a 1W adapter
backtrack/mint/fedora all using rtl8187, all same behaviour...
monitor mode works, injection (aireplay -9) works...

I really need some help =T
any output just ask, thanks in advance.