Hi, Just wondering what is the different between 6581 and 8580? I mean the way they sound? I just load all 128 preset patches in the sammichSID. I install MOS 6581 in the sammichSID. Do I get all 128 patches sounds the same as the mos 8580 and 6582A ? P.S The 6581 chips gets pretty hot. Is it normal? I have test the socket is about 12.13V. How come the chip gets kind of hot? Is this going to kill the MOS chip if I use it for a few hours? Regards, vintagestar