cancel
Showing results for 
Search instead for 
Did you mean: 

Z790 HERO with XMP 6800 error code 31

rios0rios0
Level 8

Hi guys.

I'm having an issue very similar to the issue solved here: Solved: Z790 HERO with XMP 7200 fails - Republic of Gamers Forum - 938398 (asus.com)

My build is:

  • ROG Z790 MAXIMUS HERO (last bios 1202)
  • CPU: i9 13900KS
  • DDR: 4x 32 GB G.SKILL TRIDENT Z5 RGB 6800 CL34-45-45-108 1.40V

I've tried XPM 1 and 2, with Maximus Tweak 1 and 2 (under the AI Features menu).
But any of these worked. So, I just removed the XMP completely and put everything in auto mode.
The OS initiated just fine but with a DRAM Frequency of 2100 MHz. It's not even near the 6800 that I can get from this toy here.

Could you help me, please?

Cheers!

1,313 Views
1 ACCEPTED SOLUTION

Accepted Solutions

The more memory you have, the more stress you put your CPU, motherboard, Memory controller, and system as a whole under.  DDR5 at capacities of 32GB sticks or higher are all Duel Chanel, meaning each ram chip uses 2 channels of data flow with your cpu and memory controller.  With ram, 2 sticks is ALWAYS > than 4 sticks and basically only going going to work with XMP, especially at high speeds....ram is all sold is in those packs of two because they all the chips were tested by the companies, and they then paired together all the chips that performed the same, so they woul dbe more stable.....then they also make sure they will run as whatever transfer speeds and timings they decide they are comfortable guarenteeing people will be able to use.  There is no such thing as "running xmp with 4 sticks" because an XMP profile is the profile specified by the ram chip makers for those 2 SPECIFIC memory chips in that package and those 2 chips alone.  So, when they were tested, and they wre able to get 2 32gb sticks to run at 7000mt/s and are confident anyone who buys them will be able to too, they put their stamp of apporval on it.  But imagine motherboard/cpu/memory controller are all connected by a highway....each chip is 2 channels since as i mentioned 32gb or higher is all 2 channels per chip.  so your 2 chips are taking up thje space of 4 cars on that highway already, if you put 2 more chips in there, even if they are rated for the same speed,  you are adding 4 more cars to that highway, making itharder for traffic to get through, creating ALOT more data that needs to be sent through....more chips also means more voltage needs to make it way through the controller and through the chips, and to the cpu....more voltage is more heat, more heat is less stability....you see where this going.  Chips are sold that way for a reason, and no where is it marketed or recommended to use 4 sticks of memory, at least if you are going to high speeds and want the be sure to achieve the rated xmp speeds.  Its why 4 slot motherboards have favored slots they recommend you use when install just 2 Chips.  Dont be afraid to ask questions about stuff, people will help.  ALL ram manufacturers post their ram kits ont heir websites with a list what kits they gaurentee will run xmp on what boards....you can go to gskill's page, search for your motherboard, and it will show you exactly what they say will work, and it'll all be 2 chip kits....4 chip kits dont exist.  Now if you are running just Jdec standard spec, and you do ALOT of digital design work and graphics rendering, go to town with 4 chips, at jdecc specc they will work jsut fine.  If you are just gaming, first of att, you dont need and wont need more than 32GB total,  64gb if you really wanna be safe, for YEARS to come, if ever.....i have 64 and play very taxing games, and have never seen my computer use more than 10GB at a time.  Also, with DDR5 and gaming these days....you would never be able tot ell if you were playing a game with 4 chips running 4400 mt/s or 4 chips running 8000mt/s.  jdecc spec kits are performing less than 5 percent slower than high speed xmp kits in most benchmarks and modern games, especially so when playing at 1440p or higher, which is what more people are playing at now what basically all affordable displays makes are even using now as their base resolution now.  Stuff is GPU bottlenecked most of the time gaming now, ram plays very little roll in the gaming performance now, unless you have unsupported memory installs, too much, or just bad settings....then you'll just be busy rebooting your PC after BSOD after BSOD lol

View solution in original post

5 REPLIES 5

Vynra
Level 12

you have 4 sticks of ram. you can only run 2 with that speed. you need to lower to 5200-5600. only 2 sticks of ram can run at 6800

Thank you for your quick answer.

I see. Would you have some document/link explaining what would be the reason for that?
Where can I do it? Because when I select XMP in the BIOS I don't have access to this option. It's just 1 option shown with 6800.

Silent_Scone
Super Moderator

Hi @rios0rios0 

It doesn't appear GSKILL sell a kit in this configuration, I would suggest removing one of the kits.

Combining and mixing memory kits isn't supported by memory or motherboard vendors. If you combine memory kits, the overclocked settings in which the kit is validated for XMP/EXPO are no longer valid. Purchase a single kit validated for the density and frequency you are trying to run. This is because memory vendors bin and validate the memory kit in the density in which it is sold. Whether we combine a kit with the same part number, frequency, timings or voltage the advice remains the same.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Hi, thank you for the quick answer.

To be honest, I didn't see as mixing kits. I just bought 2 kits with 2x 32 GB. I thought it was pretty normal, because nobody sells a complete kit with 128 GB complete. No?!

And the both are identical, with XMP 3 supported. So I didn't get what would be exactly the point. Sorry, could you clarify a little bit?

The more memory you have, the more stress you put your CPU, motherboard, Memory controller, and system as a whole under.  DDR5 at capacities of 32GB sticks or higher are all Duel Chanel, meaning each ram chip uses 2 channels of data flow with your cpu and memory controller.  With ram, 2 sticks is ALWAYS > than 4 sticks and basically only going going to work with XMP, especially at high speeds....ram is all sold is in those packs of two because they all the chips were tested by the companies, and they then paired together all the chips that performed the same, so they woul dbe more stable.....then they also make sure they will run as whatever transfer speeds and timings they decide they are comfortable guarenteeing people will be able to use.  There is no such thing as "running xmp with 4 sticks" because an XMP profile is the profile specified by the ram chip makers for those 2 SPECIFIC memory chips in that package and those 2 chips alone.  So, when they were tested, and they wre able to get 2 32gb sticks to run at 7000mt/s and are confident anyone who buys them will be able to too, they put their stamp of apporval on it.  But imagine motherboard/cpu/memory controller are all connected by a highway....each chip is 2 channels since as i mentioned 32gb or higher is all 2 channels per chip.  so your 2 chips are taking up thje space of 4 cars on that highway already, if you put 2 more chips in there, even if they are rated for the same speed,  you are adding 4 more cars to that highway, making itharder for traffic to get through, creating ALOT more data that needs to be sent through....more chips also means more voltage needs to make it way through the controller and through the chips, and to the cpu....more voltage is more heat, more heat is less stability....you see where this going.  Chips are sold that way for a reason, and no where is it marketed or recommended to use 4 sticks of memory, at least if you are going to high speeds and want the be sure to achieve the rated xmp speeds.  Its why 4 slot motherboards have favored slots they recommend you use when install just 2 Chips.  Dont be afraid to ask questions about stuff, people will help.  ALL ram manufacturers post their ram kits ont heir websites with a list what kits they gaurentee will run xmp on what boards....you can go to gskill's page, search for your motherboard, and it will show you exactly what they say will work, and it'll all be 2 chip kits....4 chip kits dont exist.  Now if you are running just Jdec standard spec, and you do ALOT of digital design work and graphics rendering, go to town with 4 chips, at jdecc specc they will work jsut fine.  If you are just gaming, first of att, you dont need and wont need more than 32GB total,  64gb if you really wanna be safe, for YEARS to come, if ever.....i have 64 and play very taxing games, and have never seen my computer use more than 10GB at a time.  Also, with DDR5 and gaming these days....you would never be able tot ell if you were playing a game with 4 chips running 4400 mt/s or 4 chips running 8000mt/s.  jdecc spec kits are performing less than 5 percent slower than high speed xmp kits in most benchmarks and modern games, especially so when playing at 1440p or higher, which is what more people are playing at now what basically all affordable displays makes are even using now as their base resolution now.  Stuff is GPU bottlenecked most of the time gaming now, ram plays very little roll in the gaming performance now, unless you have unsupported memory installs, too much, or just bad settings....then you'll just be busy rebooting your PC after BSOD after BSOD lol