You have been misinformed somehow. There is a thread relating to mods not working with 64 pin Saturns on SegaXtreme, but it's only if you do the A+B method that it doesn't work. This has had enough people wondering if a mod chip will work on their 64 pin Saturn, simple answer.........Yes, if you don't try to take the shortcut way around by doing the A+B method (I don't recommend this EVER anyway, the chip isn't designed to work like that, some people just got lucky) The other thing some people experience their chips not working because of, is a certain model that merely requires bridging a gap on the other side of the mod chip. I actually had a 64 pin saturn, and without doing the bridge it would not work. This was a Hi-Saturn btw. Tried it on a normal saturn and it worked just fine.