XMP Profile Stability on Asus Maximus Hero X Fails

[apologetic_zombie]

So ive been trying to get my system running at its fullest and for some reason I just cannot get my motherboard to run the XMP profile for my RAM. I have a 32GB Corsair Dominator Platinum kit rated for 3000mhz (linked below). When i go into my bios and try to run the XMP to the 3000mhz and save it the system and it tries to restart. Nothing. It will give me the code "AC" Which in the manual refers to "System has transitioned into ACPI mode. Interrupt controller is in PIC mode", no idea what it means or what to do to fix it. I tried loading defaults and only changing the XMP still fails, running latest bios aswell.



https://www.corsair.com/us/en/Categories/Products/Memory/DOMINATOR®-PLATINUM-32GB-(2-x-16GB)-DDR4-DRAM-3000MHz-C15-Memory-Kit/p/CMD32GX4M2B3000C15

 

[shknawe]

you probably have to increase the voltage.

 

[apologetic_zombie]

you probably have to increase the voltage.

I used to be able to run it on the XMP profile without raising voltage but it just stopped working. I tested other ram and same thing comes up.

 

[shknawe]

What happened prior to this that you were changing or resetting your computer? What I mean is what were you doing with computer, did you buy new memory, or were you just overclocking everything one day and ran into problems?

 

[apologetic_zombie]

What happened prior to this that you were changing or resetting your computer? What I mean is what were you doing with computer, did you buy new memory, or were you just overclocking everything one day and ran into problems?

I had the XMP Profile running, had to do some Bios updates. and then it stopped working, tried rolling back and everything. and tried with 2 more new updates and even older ones.

 

[4Ryan6]

Since this is posted in the overclocking section you do not mention anything regarding your CPU overclock or the cooling you are running? Why does that matter? Because at stock speeds even though running the XMP profile is actually overclocking the CPUs memory controller from it's spec'd 2666mhz to 3000mhz and usually is no problem.

When you add that to overclocking the CPUs multiplier as well you can get into a problem if the CPU is not kept cool enough. It is more of a problem the higher you push the multiplier approaching 5ghz?

I am also running the ASUS ROG Maximus X Hero with the 8700K at 5ghz but to keep it running cooler I by choice are running my memory manually at 2666mhz vs my XMP of 3200mhz.

Even though I have no problems running the XMP profile and do run it like that for maximum benching results there literally zero reason to run it like that for everyday use, because it does add heat to the CPU.

http://www.tomshardware.com/forum/i...r-effect-raised-multiplier-cpu-overclock.html

I am also running G-Skill TridentZ memory of which I have found tends to run the claimed numbers better than Corsair does at least on the last ASUS motherboards I have run.

Have you used the Memory OK button on the motherboard?
Look in the manual regarding how to use that feature.

My concerns are how many times you say you've flashed the BIOS even flashing back to older flashes?

Actually flashing back to older flashes is not a good idea just to run XMP profile!

I suggest you flash to the last available BIOS flash but before you do that?

Do a hard clear of the CMOS, with the main wall power pulled from the machine, then do an additional clearing after the new flash, there is a clear CMOS on the input/output panel of the motherboard.

If you are already running the last available BIOS flash then go ahead and do the CMOS clearing and it wouldn't hurt to do the clear CMOS with the motherboard battery removed as well.

 

[apologetic_zombie]

Since this is posted in the overclocking section you do not mention anything regarding your CPU overclock or the cooling you are running? Why does that matter? Because at stock speeds even though running the XMP profile is actually overclocking the CPUs memory controller from it's spec'd 2666mhz to 3000mhz and usually is no problem.

When you add that to overclocking the CPUs multiplier as well you can get into a problem if the CPU is not kept cool enough. It is more of a problem the higher you push the multiplier approaching 5ghz?

I am also running the ASUS ROG Maximus X Hero with the 8700K at 5ghz but to keep it running cooler I by choice are running my memory manually at 2666mhz vs my XMP of 3200mhz.

Even though I have no problems running the XMP profile and do run it like that for maximum benching results there literally zero reason to run it like that for everyday use, because it does add heat to the CPU.

http://www.tomshardware.com/forum/i...r-effect-raised-multiplier-cpu-overclock.html

I am also running G-Skill TridentZ memory of which I have found tends to run the claimed numbers better than Corsair does at least on the last ASUS motherboards I have run.

Have you used the Memory OK button on the motherboard?
Look in the manual regarding how to use that feature.

My concerns are how many times you say you've flashed the BIOS even flashing back to older flashes?

Actually flashing back to older flashes is not a good idea just to run XMP profile!

I suggest you flash to the last available BIOS flash but before you do that?

Do a hard clear of the CMOS, with the main wall power pulled from the machine, then do an additional clearing after the new flash, there is a clear CMOS on the input/output panel of the motherboard.

If you are already running the last available BIOS flash then go ahead and do the CMOS clearing and it wouldn't hurt to do the clear CMOS with the motherboard battery removed as well.

Sorry for lack of information on my part, just a little frustrated haha. I have a custom loop on my CPU with a mono block for VRMs as well, the CPU during a heavy gaming load for about 2 hours wont reach more than 55C and the RAM still have lots of airflow directly above them. Ive tried running the XMP profile with any CPU OC aswell as stock CPU. As for my main goal, id like to just get my RAM to run faster than 2133Mhz, hopefully 3000Mhz but Ill be fine with 2666mhz.

For the BIOS flashing I only flashed it about 5/6 times total, and when rolling back it was simply to try and see if it was the motherboards bioses but I still havent figured anything out. I am currently running the most recent one and havent gotten any luck. Ill attempt the hard clear of CMOS aswell but ive tried it before. Ill be back with results.

 

[shknawe]

Have you tried pulling two rows of memory, i.e. have only 16gb onboard, to see if it will post like that? Unless you are building a city on your computer, bad attempt at humor, 32gb is really overkill.