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AMD 790GX User's Manual
2.3.2 Installation of the CPU Cooler
For proper installation, please kindly refer to the instruction manuals of your CPU Cooler.
2.4 Installation of Memory Modules
This mainboard provides two 240-pin DDRII (Double Data Rate) DIMM slots and two 240-pin
DDR3 DIMM slots, and supports Dual Channel Memory Technology. For dual channel configu-
ation, you always need to install two identical (the same brand, speed, size and chip-type)
memory modules in the DIMM slots to activate Dual Channel Memory Technology. Otherwise,
it will operate at single channel mode.
DIMM1 and DIMM2 slot are DDR2 DIMM slots, DIMM3 and DIMM4 are DDR3 DIMM slots.
Note: DDR2 DIMMs and DDR3 DIMMS CANNOT be used simultaneously!
Please refer to following of figure to match your cpu and DIMM
.
Support Model:
1
AM2 CPU
DDR2 Memory
2
AM2+ CPU
DDR2 Memory
3
AM3 CPU
DDR2 Memory
4
AM3 CPU
DDR3 Memory
Note:
LEDs D32 and/or D33 will light up to warn you for incorrect configurations if you don't
follow the correct CPU and memory combination. Further introduction of D32 and D33
LEDs is on page 14 for your referenece.
DIMM installation:
Please insert the DIMMs into the DIMM slots vertically downwards.
Make sure you check the notch key position to be matched with the
DIMMs before you plugging them into the slots.
Note:
DDR2 and DDR3 DIMMs have different notch key positions.
To install system memory:
1. Power off the computer and unplug the
AC power cord before installing or
removing memory modules.
2. Locate the DIMM slot on the board.
3. Hold two edges of the DIMM module
carefully, keep away from touching its
connectors.
4. Align the notch key on the module with
the rib on the slot.
5. Firmly press the module into the slots until the ejector tabs at both sides of the slot
automatically snap into the mounting notch. Do not force the DIMM module in with extra
force as the DIMM module only fits in one direction.
6. To remove the DIMM modules, push the two ejector tabs on the slot outward
simultaneously, and then pull out the DIMM module.
Static electricity can damage the electronic components of the computer or optional
boards. Before starting these procedures, ensure that you are discharged of static
electricity by touching a grounded metal object briefly.
