Memory for Indigo 2 (IP22) needs to be FPM with ECC. But I couldn't find anywhere if these SIMMs may be "registered", aka "buffered". I see quite a few cheap FPM ECC SIMMs for sale, but most of them have some strange additional chips on them, I guess that means there are of the buffered kind. Will these modules work in I2? -- If you cut off my head, what would I say? Me and my head, or me and my body?