Question Help with G.Skill DDR5 6000 MHz RAM on MSI MPG X670E Carbon PC wont BOOT on EXPO

[karolm]

Hi everyone,

I recently added another set of RAM to my system: G.Skill Trident Z5 Neo DDR5 2x32GB 6000 MHz, giving me a total of 128 GB (4x32GB). However, I'm running into some issues:

1. When I enable EXPO, the PC won’t boot.
2. Clearing the CMOS allows the PC to boot, but only with the RAM running at 3600 MHz.

Here’s what I’ve tried so far:

• Updated the BIOS to the latest version.
• Played around with some manual memory settings in the BIOS, like memory try it or instead of 6000 mhz put it at 4800mhz or 4000mhz but it would only boot at 3600mhz default cmos.

I should mention that my PSU is quite old (6+ years), though it’s a 1000W unit.

My questions:​

1. Has anyone with the MSI MPG X670E Carbon motherboard experienced similar issues with DDR5 and EXPO? If so, did you manage to fix it?
2. Has anyone successfully overclocked this RAM manually on the same board? If so, what settings did you use? I’m new to manual RAM overclocking, so any tips would be greatly appreciated.
3. Is it better to run 128 GB at 3600 MHz or stick with 64 GB at 6000 MHz? I’m worried about making my system slower because of the mismatched settings, but I can’t return the new RAM to the store.

My PC specs:​

• Motherboard: MSI MPG X670E Carbon
• CPU: AMD Ryzen 9 7950X
• GPU: Gigabyte RTX 4080
• PSU: 1000W (6+ years old)

Thanks in advance for any advice or suggestions! 🙏

 

[Lutfij]

I recently added another set of RAM to my system: G.Skill Trident Z5 Neo DDR5 2x32GB 6000 MHz, giving me a total of 128 GB (4x32GB). However, I'm running into some issues:
What sort of time difference are we looking at between the purchases of both ram kits?

Motherboard: MSI MPG X670E Carbon
+
Updated the BIOS to the latest version.
For the sake of relevance, please state the BIOS version you're on for your motherboard. Did you clear the CMOS after verifying the BIOS was flashed successfully?

Ideally, you clear the CMOS by:
Disconnecting from the wall and display, the remove the CMOS battery, press and hold down the power button for 30secs to drain any residual power, then reseat the battery after 30mins.

PSU: 1000W (6+ years old)
1000W is the advertised wattage of the unit. What is the make and model of the unit and what did it power throughout it's 6 year tenure in your prior build till today?

Might I ask, why do you need all this ram?

 

[karolm]

What sort of time difference are we looking at between the purchases of both ram kits? Around few months i made sure the spec of those rams are still the same and they are.

MFor the sake of relevance, please state the BIOS version you're on for your motherboard. Did you clear the CMOS after verifying the BIOS was flashed successfully? Bios version is 7D70v1 the most recent . and yes i did clear CMOS after flash.


1000W is the advertised wattage of the unit. What is the make and model of the unit and what did it power throughout it's 6 year tenure in your prior build till today? Sorry but i do not have exact make and model at this moment i am at work .

Might I ask, why do you need all this ram? Pure gaming needs i know 64 gb is enough but i am upgrading my setup recently and i will be buying 5090 next week and i though i would upgrade RAM as well because had 2 slots.

 

[Bob.B]

Hi everyone,

I recently added another set of RAM to my system: G.Skill Trident Z5 Neo DDR5 2x32GB 6000 MHz, giving me a total of 128 GB (4x32GB). However, I'm running into some issues:

1. When I enable EXPO, the PC won’t boot.
2. Clearing the CMOS allows the PC to boot, but only with the RAM running at 3600 MHz.

Here’s what I’ve tried so far:

• Updated the BIOS to the latest version.
• Played around with some manual memory settings in the BIOS, like memory try it or instead of 6000 mhz put it at 4800mhz or 4000mhz but it would only boot at 3600mhz default cmos.

I should mention that my PSU is quite old (6+ years), though it’s a 1000W unit.

My questions:​

1. Has anyone with the MSI MPG X670E Carbon motherboard experienced similar issues with DDR5 and EXPO? If so, did you manage to fix it?
2. Has anyone successfully overclocked this RAM manually on the same board? If so, what settings did you use? I’m new to manual RAM overclocking, so any tips would be greatly appreciated.
3. Is it better to run 128 GB at 3600 MHz or stick with 64 GB at 6000 MHz? I’m worried about making my system slower because of the mismatched settings, but I can’t return the new RAM to the store.

My PC specs:​

• Motherboard: MSI MPG X670E Carbon
• CPU: AMD Ryzen 9 7950X
• GPU: Gigabyte RTX 4080
• PSU: 1000W (6+ years old)

Thanks in advance for any advice or suggestions! 🙏

If you remove the orig ram and install the new ram in the proper slots does it boot and run at the correct speed?

 

[faalin]

When using four sticks of RAM on an AMD Ryzen 9 7950X, the optimal RAM speed is generally considered to be around 5200 MT/s as this is the highest officially supported speed, although with the right memory modules and overclocking, you may be able to achieve slightly higher speeds depending on your motherboard and cooling capabilities.

Being that you are running 2 different kits, not 1 kit with 4 sticks, you will probably have issues hitting 6000MT/s

 

[karolm]

If you remove the orig ram and install the new ram in the proper slots does it boot and run at the correct speed?

Yes

 

[karolm]

When using four sticks of RAM on an AMD Ryzen 9 7950X, the optimal RAM speed is generally considered to be around 5200 MT/s as this is the highest officially supported speed, although with the right memory modules and overclocking, you may be able to achieve slightly higher speeds depending on your motherboard and cooling capabilities.

Being that you are running 2 different kits, not 1 kit with 4 sticks, you will probably have issues hitting 6000MT/s

i bought same exact kit of 2 ram stick as i already had and i also tried 5200MT and had same issue with boot i was only able to boot 2ith 3600MT. The only thing that i didnt do is to play around with manual oc voltage and all that mostly because i had never done it .

 

[Bob.B]

Yes

It would seem that you have 2 kits of ram that don't play nice together.

It's your call if you want to continue to chase this 128GB stuff or just settle for 64Gb.

 

[steveb1976]

if you look on amd's site for your cpu.. it clearly states that 4x rams sticks will run at ddr5 36000mts... minimum... anything over that is motherboard and ram dependant...

you could try all the expo options. see if you get over 3600mts.. 1 of them should work. if not try manually setting the speeds yourself. (make not of what the 3600 settings are and go up 100mt's and see.. you might have to adjust voltage .. there is detailed videos on youtube.. i suggest watching a few before you manually try..

 

[faalin]

i bought same exact kit of 2 ram stick as i already had and i also tried 5200MT and had same issue with boot i was only able to boot 2ith 3600MT. The only thing that i didnt do is to play around with manual oc voltage and all that mostly because i had never done it .

Buying two exact kits of 2x32 is not the same as buying a 4x32 kit. The manufacture tests sticks and pairs them together to make sure they will work at the rated speed and timings. They can not guarantee that kit 1 will work with kit 2, they could have come out of different factories, different production lines, or even different chip bins. There are a lot more settings then just the speed and 4 timing numbers that they post on the package.

You also have to look at the CPU as the memory controller is on it, and adding those 2 extra sticks put more load on the memory controller. If your only gaming and dont need the extra ram, i would just return it as the speed will be way more beneficial then the amount. if your doing any production and need the extra amount then speed doesnt matter.