ASUS X99-E ram detection issues

[Fasauceome]

Pretty sure my friend's motherboard is FUBAR (possibly due to immebse dust build up), but if there's something I haven't tried I'd love to hear it.

Of 4 dominator platinum dimms, only 2 can be used. This is we've tried:

• Standard configuration (which was working not long ago)
• Dimms in only A1 and B1
• Dimms on only C1 and D1
• 2 dimms on one side of the CPU and one dimm on the other
• D1 and A1 only
• A2 through D2
• Dual channel in A1 through B2

As you can see, we've tried every combination. Every dimm works, but here are the results:

• When C1 and/or D1 are populated, nothing in A1 or B1 will be detected. System will work.
• When A1 through B2 dual channel is active, it will be detected in the BIOS but freeze the OS a few seconds after loading.
• Ram will run at full 2400MHz speed in any configuration without changing behavior.

It would be kinda nice if his motherboard could use all 32GB of ram, because he really does use it all. If it's screwed though, I probably get to build him a Ryzen system, so that could be fun. Interestingly enough, after diagnosing this ram issue, I overclocked his 5960X again and it's at 4.3GHz with 1.15V, so it seems only the ram is damaged.

[pebble guy]

Had a hard time understanding what you have tried, but it might just be me....
Try with just 1 stick, and try every slot.
As far as i remember, Haswell-E has memory controller in the cpu, so it might just be a little foobar.

[Fasauceome]

Just now, pebble guy said:

Had a hard time understanding what you have tried, but it might just be me....
Try with just 1 stick, and try every slot.
As far as i remember, Haswell-E has memory controller in the cpu, so it might just be a little foobar.

The ram all works and the PC posts, but we can only get A1 and B1 to work, so we're at dual channel 16GB instead of quad channel 32GB

[pebble guy]

So did you try just one stick?

[Fasauceome]

Just now, pebble guy said:

So did you try just one stick?

One stick works, 2 sticks work. Any more does not work.

[pebble guy]

Ok. if that is true for all slots, then i would think you have a cpu issue

[Fasauceome]

1 minute ago, pebble guy said:

Ok. if that is true for all slots, then i would think you have a cpu issue

Unfortunately since I can't stress the memory controller to cause some sort of crash, I'd need some way of testing to be sure. I don't have any X99 CPUs lying around unfortunately.

[pebble guy]

Just for the record. Have you done a cmos reset?

[Fasauceome]

3 minutes ago, pebble guy said:

Just for the record. Have you done a cmos reset?

That's what we did first.