I use FF with 256MB of RAM and 850MHz processor on XP. It could be my modem. It's an old SB3100 but I can reach full speed with it. My NIC is old too, well my hole setup is old hahahah. IE is the same but spiking in small numbers like 5 to 10 and 15 to 25. FF spikes in larger increments. But I get full speed dling so this is not a problem at all. I just wanted to know if I can smooth it out.