I have issues with all 4 memory slots being occupied on this motherboard. The board is capable of 8 GB of RAM.
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When the first 2 memory slots are utilized, the computer boots as normal, regardless of which of the four memory modules I use; however when all four slots have memory modules inserted, the computer will power up for a second or so and then trip. This power up down will continue till I switch off from the power supply's power switch.
All 4 memory modules that I bought has been proven to work since I swapped them one at a time in the first 2 slots.<o:p></o:p>
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I did not and do not overclock, even with my previous motherboard.<o:p></o:p>
The below specified power supply is the second power supply that I bought to eliminate the power supply as the issue.<o:p></o:p>
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The BIOS was upgraded to F7, problem still persist.<o:p></o:p>
Running all BIOS settings in "AUTO" mode does not help. Load Optimized mode does not help. Basically I doubt if the BIOS is even accessed.<o:p></o:p>
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Once again memory in slots 1 & 2 work ok, but memory in slots 1, 2, 3 & 4 does not. Memory only in slots 3 & 4 does not work either.<o:p></o:p>
The memory runs in single channel only, not dual channel. If you place the memory in slot 1 and slot 3, as per the manual, the computer exhibits the above symptoms.<o:p></o:p>
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Unplugging all expansion boards and all hard drives is no joy with all memory slots filled, but seem to power up ok with memory slots 1 & 2.<o:p></o:p>
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So the summary is:<o:p></o:p>
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1. The computer boots with only slots 1 & 2 with memory.<o:p></o:p>
2. Have replaced memory in slots 1 & 2 with all 4 sticks to prove that they are good.<o:p></o:p>
3. Have replaced the power supply.<o:p></o:p>
4. Have replaced the motherboard.<o:p></o:p>
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Motherboard: GA-X48-DQ6 rel 1.3<o:p></o:p>
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BIOS: AWARD BIOS, X48-DQ6 F7, Flash Memory Type MXIC 25L8005, Default setting except for the boot order, date & time.<o:p></o:p>
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Memory: MUSHKIN 4ea(2x2GB) DDR2, Part number 996587, HP2-6400, 5-4-4-12, 1.8V - 2.1V<o:p></o:p>
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Power Supply: ANTEC Earthwatts, 650 watt, part number EA-650.<o:p></o:p>
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CPU: INTEL Core 2 Quad, part number Q9450.<o:p></o:p>
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Video: ASUS EAH4850 HDMI - 512 MB DDR3.<o:p></o:p>
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Thanks in advance for the help!!<o:p></o:p>
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