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X79 saber tooth/4930k memory problems

post #1 of 2
Thread Starter 
The other day I noticed my pic only seeing 12gb out of 16 and running in triple channel mode. All 4 sticks are detected in the bios but the bios only registers 12gb. CPU-z also detects 4 modules but shows only 12/triple in use.

I've tried rolling back the bios to version 4071 with no success. Any one experience an issue like this? Or am I looking at a IMC failure?

Thanks for the help.
post #2 of 2
Quote:
TROUBLESHOOTING

Missing RAM. This can be due to a number of things. Bad power supply to slots, bad slots on the motherboard, bad sticks of RAM. If your RAM/MB is bad, not much you can do outside of RMA. But before you do that, as noted above, check the RAM is seated properly. Also, a super common cause of missing RAM is bad contact between the CPU and the pins in the CPU Socket! Sometimes a pin can be bent out of place in the socket. Check the socket in good light moving the board around. Check any unevenness in the reflections you see to see if it's an out of place contact. A magnifying glass and a pin can easily correct this but you need a steady hand and the confidence not to make things worse. You could take the board to a jewelers, or of course RMA it if you're pretty sure it came with bent pins.

Bad contact can also be caused by the CPU shifting or tipping in the socket due to uneven or excessive pressure from the CPU cooler! Make sure when fitting the cooling solution you tighten only hand tight (never with pliers etc.) and in the recommended gradual crosswise manner. i.e. half a turn on each screw on opposite diagonals, in order.

https://rog.asus.com/forum/showthread.php?25510-Rampage-IV-Extreme-RAM-Guide

I always suggest debris or bent pins in the socket. Removing the heatsink/block and cpu out of the socket and reinstalling can fix it too.
    
CPUMotherboardGraphicsRAM
Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
MonitorPowerCaseAudio
BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
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CPUMotherboardGraphicsRAM
Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
MonitorPowerCaseAudio
BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
  hide details  
Reply
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