Slow computer

I occasionally notice that my computer is old:
papag:~ $ cat /proc/cpuinfo 
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 8
model name      : Pentium III (Coppermine)
stepping        : 6
cpu MHz         : 798.287
cache size      : 256 KB

And only 750 MB of memory.

But you can't beat absolutely silent, ya know? Once you go silent, no computer works for me anymore.

I really need to use one of the other (much faster, much louder) machines in my house, since I've given up on "silent computing" systems which never are.

I think the answer is:
-- USB keyboard and mouse (done)
-- USB extender over Cat5
-- DVI over fiber or something
-- audio.... maybe my USB audio DA converter would work? not sure the bandwidth on those USB over Cat5 things, but should work considering how piss-slow regular USB is.