When did Dual Channel RAM come about?

[Caveman]

And if it doesn't, I'd assume I can mix and match any PC2100 size memory in the 3 DIMM slots with no issues???

 

[herm0016]

should not matter, from what i understand even 2 channel boards will work with one channel and different size dimms.

 

[Lord Evermore]

Non-current P4 dual-channel boards will not work without matching sizes in both channels. I don't think any Athlon chipsets supporting dual-channel ever had that limitation, but it was a specific difference between the designs, not a "flaw" exactly.

The 8KHA+ is a single channel chipset.