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I have a Supermicro X8DAH+-F Rev 2.01 motherboard that will not power on.

I have two Xeon E5645 installed and 6x 8GB 2Rx4 PC3-10600R DIMMs installed in the A and B slots for each channel of each CPU respectively.

Ram Link

The fans spin briefly then stop when turning on the PSU and the BMC light flashes, but I cannot power on the computer. The BMC does not appear to request a DHCP address. There are no beeps, but I know the beeper works because it beeps if no RAM is installed.

I've attempted a BIOS reset, but am now at a loss.

The CPUs and RAM were taken from a known-working box.

Is this configuration correct? Is there some way to also factory reset the BMC without the computer "powered on"?

retrodev
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2 Answers2

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4 beeps with this AMIBIOS indicates a problem communicating with the RAM or a clock generation problem on the motherboard.

In my case I identified a damaged pin on cpu socket one that maps to slot 1, bank 1 of the memory controller.

retrodev
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Actually... according to the manual. (I know... who reads those things?) ... you need to place the RAM in slots P1-1A, P1-1B, P1-1C, P2-1A, P2-1B, and P2-1C. Don't just jam them all on slots A & B.

TheCompWiz
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  • I thought the manual says that for E5600 series having two banks populated is fine. In fact if you populate all 3 it will be down rated from 1333MHz to 800MHz. Or am I misreading it? – retrodev Jan 18 '16 at 18:37
  • Also, does the manual say anything about 2Rx4 memory being supported or not? – rackandboneman Jan 18 '16 at 19:11
  • From the manual: RDIMM • 240-pin Reg. DDR3 ECC 1333/1066/800 MHz memory with support of up to 288 GB in 18 slots Note 1. 240-pin Dual Rank (DR) 16 GB Reg. ECC DDR3 1333/1066/800 MHz memory will support up to 288 GB. Memory speed will be downgraded to 800 MHz. Note 2. 240-pin Quad Rank (QR) 16 GB Reg. ECC DDR3 1066/800 MHz memory will support up to 192 GB (with 6 DIMMs max. per CPU). Memory speed will be downgraded to 800 MHz. – retrodev Jan 18 '16 at 19:50