I use Linux, so the choices I have for bittorrent clients that can have multiple torrents loaded into it are limited.
I love Azureus for Linux. Even though it uses Java, it isn't as much of a resource hog as it is in Windows. I currently have 250+ torrents loaded into it, and am regularly seeding 32 or more at the same time, with virtually no slowdown on my Pentium III 800 mhz 384 megs RAM. I can regularly achieve over 500KB/s with it, too. All I need to do is forward one port and I'm set.
uTorrent for Windows is nice, too. I use it on the computers that have Windows. I haven't really fully tested it (by loading 250 torrents into it), but it seems pretty fast and stable. Definitely a better choice for Windows than Azureus, since Java seems to be sluggish on Windows.






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