TYAN TRINITY I7205 Manual page 16

One piece DIMM1 or DIMM3
Two pieces DIMM1+DIMM2 or DIMM3+DIMM4
Four pieces DIMM1+DIMM2+DIMM3+DIMM4
Memory
Slot
Single Memory Channel
At least one unbuffered DDR ECC/non -ECC
module must be installed
Memory modules must be installed in bank -A
DIMM1 or
DIMM3
Single channel 64-bit memory bandwidth
For memory performance, single memory
channel solution is not recommended
Dua l Memory Channel
At least two unbuffered DDR ECC/non-ECC
modules must be installed
Memory modules must be installed in pairs
DIMM1+DIMM2 or
DIMM3+DIMM4 or
DIMM1+DIMM2+DIMM3+DIMM4
Dual channel 128-bit memory bandwidth
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Memory Memory
Channel Bandwidth
Single 64-bit
Dual 128-bit
Dual 128-bit