Biostar M7TDB User Manual page 20

Chapter 1
Install DIMM3/4 in any combination table:
DIMM3
Double
X
Single
* This M7TDB motherboard does not support with parity DIMM.
*The list shown above for DRAM configuration is only for reference.
Note: 1. Don't stuff or remove the DIMM memory, if the LED1 is
lighting.
2. When you're using single-sided memory on DIMM4, you
must use single-sided memory on DIMM3. If you use
double-sided memory on DIMM3, please do not insert any
memory on DIMM4 and vice versa.
Motherboard Description
DIMM4
X
Double
Single
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