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X99 Taichi only seeing 32gb of 64gb quad ch ram |
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blark 
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Joined: 20 Dec 2016 Status: Offline Points: 11 |
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 Posted: 22 Dec 2016 at 1:55am |
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No luck with the recommendations thus far. I feel like I've tried every possible motherboard setting... wish I had an extra 2011-3 CPU here to try, I strongly suspect the Xeon is the culprit.
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blark
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Posted: 21 Dec 2016 at 11:34pm |
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Thank you for this list of great advice, I will give it all a shot and report back soon!
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parsec
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Joined: 04 May 2015 Location: USA Status: Offline Points: 4996 |
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Posted: 21 Dec 2016 at 11:02pm |
I hope your Xeon processor is not locked into the 2133 maximum speed of its spec. But you've tried using it at 2133, correct? With all 64GB in the board, clear the UEFI/BIOS with the jumper or CLR CMOS button on the board's IO panel. Please do not skip clearing the UEFI/BIOS. I assume you tried using the XMP profile, but don't do that for this test. Have all the memory timings and speed options set to Auto. All the way at the bottom of the DRAM Configuration screen, find the MRC Fast Boot option, set it to Disabled. Also set the Memory Test option to Enabled. That will allow memory training to occur during POST, but will increase the POST time. In the FIVR Configuration screen, find the System Agent Voltage Offset option. System Agent voltage is not necessarily better increased, but in your case give it a positive offset of 0.05V - 0.1V. In the Voltage Configuration screen, increase the DRAM Voltage to 1.25V. In my experience with X99, the missing memory in Windows, but not in System Browser, CPU-Z, etc, is normally caused by a memory OC or the memory timings being to aggressive. |
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Xaltar
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Posted: 21 Dec 2016 at 10:41pm |
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blark
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Posted: 21 Dec 2016 at 10:05pm |
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But CPU is fine with underclocking the ram to 2133 for the first 32gb it doesn't seem to make sense that it would only work for half of it and not the other half.
It seems waaaaaay more likely that something is wrong with the CPU memory controller or motherboard...
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xoanon
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Posted: 21 Dec 2016 at 7:40pm |
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wardog
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Posted: 21 Dec 2016 at 1:45am |
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blark
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Posted: 20 Dec 2016 at 10:35pm |
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I took some photos for reference purposes:
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blark
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Posted: 20 Dec 2016 at 10:23pm |
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This is a quad channel 4 x 16 gb kit. As I said, I bought it from the QVL to avoid these issues. It is always A1 and B1 that are shown, no matter how I shuffle or mix up the memory. How can it be the memory if when I switch around the modules they seem to work fine?
I double checked the CPU socket last night and there don't appear to be any bad pins, I also checked the CPU socket at the store with the employee and he didn't see any either. |
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wardog
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Posted: 20 Dec 2016 at 6:10pm |
Your word "mixed' there stood out to me. Is this a 64GB(4x16GB) Matched Kit? Or instead two 32GB(2x16GB) non-Matched Kits? By what you describe it is either one of two things. The memory, or CPU and or a CPU socket with bad pin(s) Is it always A1 and B1 that are shown? |
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blark wrote: