Won’t Post with 2 Sticks Of RAM

[SteelRonny]

Asus Maximus VIII Hero - Z170

Intel 7400

2 x 8 GB 3000 MHz CL16 T-Force Vulcan Z

R9 M360

WD Blue 1 TB

 

I used to have a stick of 8gb random RAM that ran at 2133 and it worked fine, I decided to get a new set of the Vulcan Z. It will not post with both sticks installed. It has error code 49(Cant Find What it Means) and either the CPU or DRAM LED on. It works with XMP enabled on one stick but same problem when I insert the second stick. I’ve tried using the different slots and I checked for bent pins and didn’t find any. It also double boots every time I insert the second stick. I am on the latest BIOS.

 

[eeeee1]

from the ark sheet, that cpu isnt designated to run the memory any higher than 2400. try to run your memory at lower speeds.

[SteelRonny]

I forgot to mention that I tried this first still gives me issues at 2400 and 2133.

[svmlegacy]

11 minutes ago, SteelRonny said:

Asus Maximus VIII Hero - Z170

Intel 7400

2 x 8 GB 3000 MHz CL16 T-Force Vulcan Z

R9 M360

WD Blue 1 TB

 

I used to have a stick of 8gb random RAM that ran at 2133 and it worked fine, I decided to get a new set of the Vulcan Z. It will not post with both sticks installed. It has error code 49(Cant Find What it Means) and either the CPU or DRAM LED on. It works with XMP enabled on one stick but same problem when I insert the second stick. I’ve tried using the different slots and I checked for bent pins and didn’t find any. It also double boots every time I insert the second stick. I am on the latest BIOS.

What have you done to debug this already? Have you tried each stick individually?

[SteelRonny]

Just now, svmlegacy said:

What have you done to debug this already? Have you tried each stick individually?

Yes, I’ve also tried each slot individually, whatever I do it won’t post with 2 sticks. I’ve tried running at lower speeds as well. Both sticks are functional and all the slots are working but whatever the setup with the RAM it just doesn’t work with 2.

[svmlegacy]

4 minutes ago, SteelRonny said:

Yes, I’ve also tried each slot individually, whatever I do it won’t post with 2 sticks. I’ve tried running at lower speeds as well. Both sticks are functional and all the slots are working but whatever the setup with the RAM it just doesn’t work with 2.

With both installed, clear the CMOS. If that doesn't get a POST, look at bringing the BIOS up to date.

 

Edit: Latest version 3802 is supposed to improve DRAM compatibility.

[SteelRonny]

9 minutes ago, svmlegacy said:

With both installed, clear the CMOS. If that doesn't get a POST, look at bringing the BIOS up to date.

I cleared CMOS while it was power off and the got code AC ( Reserved for ASL) then switched to 55 (No memory installed)

It also doubles booted again. I also have a MemOK! switch at the top right of my mobo

[SteelRonny]

11 minutes ago, svmlegacy said:

With both installed, clear the CMOS. If that doesn't get a POST, look at bringing the BIOS up to date.

 

Edit: Latest version 3802 is supposed to improve DRAM compatibility.

I see the edit but I believe I’m been on version 3802 since launch 2 years ago

[svmlegacy]

2 minutes ago, SteelRonny said:

I see the edit but I believe I’m been on version 3802 since launch 2 years ago

Can you boot up with 1 DIMM to double check?

Which slots are you using exactly? Try to use two adjacent slots, just to see if it starts.

[SteelRonny]

8 minutes ago, svmlegacy said:

Can you boot up with 1 DIMM to double check?

Which slots are you using exactly? Try to use two adjacent slots, just to see if it starts.

I believe they are A2 and B2 which are the main slots but I will try B1 and A2 with clearing the CMOS since I tried this earlier.

Same issue as before error code AC then 55

 

Edit:Mixed up letters

[SteelRonny]

6 minutes ago, svmlegacy said:

Can you boot up with 1 DIMM to double check?

Which slots are you using exactly? Try to use two adjacent slots, just to see if it starts.

I will try to use the MEMok! Button since it says it would co figure incompatible memory.

[svmlegacy]

2 minutes ago, SteelRonny said:

I will try to use the MEMok! Button since it says it would co figure incompatible memory.

I've actually had good luck with the older mobo's and MemOK! Totally forgot about that until I checked your manual.

 

The config which might allow booting in some cases is A1/A2

[SteelRonny]

8 minutes ago, svmlegacy said:

I've actually had good luck with the older mobo's and MemOK! Totally forgot about that until I checked your manual.

 

The config which might allow booting in some cases is A1/A2

Sorry, I couldn’t find online or in the manual how to use memOK, I’ll put the RAM in A1 and A2 but could you tell me how to use it?

[SteelRonny]

23 minutes ago, svmlegacy said:

I've actually had good luck with the older mobo's and MemOK! Totally forgot about that until I checked your manual.

 

The config which might allow booting in some cases is A1/A2

THANK YOU I POSTED WITH A1 AND A2

[SteelRonny]

24 minutes ago, svmlegacy said:

I've actually had good luck with the older mobo's and MemOK! Totally forgot about that until I checked your manual.

 

The config which might allow booting in some cases is A1/A2

But the last thing should I just be able to switch back to A2 B2 for dual channel?

[svmlegacy]

3 minutes ago, SteelRonny said:

But the last thing should I just be able to switch back to A2 B2 for dual channel?

Maybe, but I make no guarantees. Obviously in this situation you only have Single-Channel memory.

 

Unless it has changed, MemOK! works like this:

1. Install your RAM in A2/B2
2. Try to start it
3. If it fails, while running, press the MemOK! button until a LED starts flashing/ system restarts
4. Wait until the flashing light stops/the system starts up

Usually it clears the CMOS in the process. Doesn't always work, but usually it does. Make sure you're seeing all the RAM in the BIOS if it does start.

[SteelRonny]

32 minutes ago, svmlegacy said:

I've actually had good luck with the older mobo's and MemOK! Totally forgot about that until I checked your manual.

 

The config which might allow booting in some cases is A1/A2

Dual channel doesn’t work even with MemOK! But if you know anything that could help me fix that please tell me. Anyways thanks for your help

[svmlegacy]

Just now, SteelRonny said:

Dual channel doesn’t work even with MemOK! But if you know anything that could help me fix that please tell me. Anyways thanks for your help

Some platform/cpu combinations are just really picky with dual channel. You'll have to find a different set of dimm's to use. My Vulkan Z's are Samsung B-die, so try a Crucial/Corsair kit to try Micron memory.

I have a Celeron G440 that does this kind of thing, and it only does it on certain motherboards. Funny enough, my Asus board is the one it'll run Dual-channel with.