EVGA X58 3X SLI - Manual (Page 20)

Installing System Memory (DIMMs)
Your new motherboard has six 240-pin slots for DDR3 memory. These slots
support 256 MB, 512 MB, 1GB, 2GB, 4GB DDR3 technologies. There must be
at least one memory bank populated to ensure normal operation. Use the
following the recommendations for installing memory. (See Figure 1 on page
15 for the location of the memory slots.)
One DIMM: If using 1 DIMM (Single Channel), install into: DIMM slot 1.
Two or Four DIMMs: If using 2 DIMMs (Dual Channel), install into: DIMM
slots 1 and 3. If using 4 DIMMs (Dual Channel), install into: DIMM slots
2, 1, 4, and 3.
Three DIMMs: If using 3 DIMMs (Triple Channel), install into: DIMM slots
1, 3 and 5.
Six DIMMs: If using more than 4 DIMMs, use: DIMM slots 2, 1, 4, and 3
then proceed to occupy the following DIMM slots in this order: 5 and 6.
Use the following procedure to install memory DIMMs. Note that there is only
one gap near the center of the DIMM slot. This slot matches the slot on the
memory DIMM to ensure the component is installed properly.
1. Unlock a DIMM slot by pressing the module clips outward.
Align the memory module to the DIMM slot, and insert the module vertically
into the DIMM slot. The plastic clips at both sides of the DIMM slot
automatically lock the DIMM into the connector.
DIMM Slot 2
DIMM Slot 1
DIMM Slot 4
DIMM Slot 3
DIMM Slot 6
DIMM Slot 5