That's what I was thinking of trying next. Someone suggested Dynamat, which I know is used to help with virbrations from car stereos so seems like it might help here as well.
AMD Athlon 64 3000+ (Overclocked to 3300+)
1GB PC3200 DDR
2x200GB Seagate SATA RAID 0
BFG 6800GT OC w\\128MB Ram
2x 19\" Samsung 930B LCDs