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No Automatic Powerdown

Last response: in Memory
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May 30, 2007 10:10:22 AM

When I have two 1GB sticks of Kingston memory (KHX6400D2LLK2/2GN)(PC2-6400 CL4 240-Pin DIMM) installed, PC powers off automatically when I do a shutdown.

When I have four 1GB sticks of above Kingston memory installed, PC will not automatically power off when I do a shutdown. Shutdown process appears to complete OK, but power continues and PC hangs. I then have to push power button on front of PC to power off.

All 4 memory sticks are same KINGSTON model as noted above: KHX6400D2LLK2/2GN (PC2-6400 CL4 240-Pin DIMM). These sticks are supposed to be compatible with motherboard.

I have tried reseating memory, switching sticks between DIMM slots, clearing CMOS, reinstalling F4 bios, unplugging/uninstalling and reinstalling/replugging in removable hardware and cables, and reinstalling VISTA 32 bit version 3 times.

With either 2 sticks or 4 sticks installed, system boots fine and shows either 2GB or 3.25GB of RAM available and Installed Memory either 2000MB (2 sticks) or 4095MB (4sticks). I have tried pairing all 4 memory sticks in a 2GB / 2 DIMM configuration. All 4 worked fine in that configuration and system powered off automatically when shutdown. So I don't believe it's an issue of bad memory.

During post with all 4 sticks installed, one message that appears:
"SLI-Ready Memory Detected-Disable, 4 DIMMS Not Supported"

What exactly does this message mean? Is it related to my powerdown problem with four 1GB sticks installed? Can it be corrected with a bios setting? I looked for a DIMM bios parameter I could change, but other than voltage options, I didn't see anything. Perhaps I missed something. A good number of bios settings are still a mystery to me.

Yes, I can run PC on 2GB of memory, but would rather have system automatically power off with all four KINGSTON 1GB sticks installed, without me having to push front power switch.

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Motherboard: GA-N680SLI-DQ6(rev. 1.0)
Bios: F4
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Graphic card: Nvidia: e-GeForce 8800 Ultra
CPU: Intel Core 2 Extreme QX6700 Speed: 2.66GHz

Power Supply: OCZ 1000 watt, model number OCZ1000PXS.
Case: LianLi 1000.
I built system between 25-27 May 2007. Motherboard, power supply, memory, video card, and CPU all purchased new since 21 May 2007.
Two Raptor 150GB SATA drives in RAID0.

More about : automatic powerdown

May 30, 2007 5:58:37 PM

Quote:
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During post with all 4 sticks installed, one message that appears:
"SLI-Ready Memory Detected-Disable, 4 DIMMS Not Supported"

Don't worry about this. I believe it just means that while your DIMMs have the info needed for SLI/EPP "automatic" overclocking, that automatic overclocking system doesn't support 4 DIMMs, and so has not been enabled.

Installing a full 4 DIMMs is pushing the limits of many standard desktop motherboards. First, download and run memtest86+ just to make sure the memory is working properly. After that, I would contact your MB's tech support for assistance.
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