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R.A.M

JohnnyBGood
Level 8

MOBO rog crosshair x670e extreme, installed 128gb ram 6000 mghz, bios only reading 4800 mghz, anyone help with what needs to be changed for bios to enable the full speed of the RAM.

Thanks

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3 ACCEPTED SOLUTIONS

Accepted Solutions

You need to buy a 128GB kit if you want to utilise EXPO.

What you've done is buy two separate kits, and combine them. It's simply not how things work. Neither the memory vendor nor the board vendor recommend doing this.

6000MT is an overclock. The memory vendor does not implement contingencies for users doing things the way you are. When you add another kit to the system, everything the memory vendor has done to ensure the kit will work at the advertised timings, voltage and frequency is no longer valid.

You need to remove one kit and retest. You can refer to the motherboard memory QVL to purchase a single, validated kit.

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

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Thank you once again, below is a suggestion from another contributor, whats your take on that ?

""So if you want to run supported 4 DIMMS with 128GB and up, the only kit is the 4x48GB - this has "Socket Support" for 1,2,4 configurations and also runs fine on my Strix e-e board.""

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As mentioned above, that kit is on the QVL 👍

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

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13 REPLIES 13

cjmnews
Level 9

This does not seem to be an Armoury Crate issue.

Have you tried enabling XMP I or XMP II?  This is handled in the BIOS.

Silent_Scone
Super Moderator

Please state which memory kit? Looks as though you're combining them, which is not supported.

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

Corsair vengeance 64gb (2x32gb) DDR5 6000mhz C40 memory- black x2 = 128gb

You need to remove one of the kits. 128GB 6000MT is not possible, and combining kits is not recommended.

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

Well now I am confused , are you saying the board doesnt support 128gb ram ?

You need to buy a 128GB kit if you want to utilise EXPO.

What you've done is buy two separate kits, and combine them. It's simply not how things work. Neither the memory vendor nor the board vendor recommend doing this.

6000MT is an overclock. The memory vendor does not implement contingencies for users doing things the way you are. When you add another kit to the system, everything the memory vendor has done to ensure the kit will work at the advertised timings, voltage and frequency is no longer valid.

You need to remove one kit and retest. You can refer to the motherboard memory QVL to purchase a single, validated kit.

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

Well that is very interesting, in my search for ram initially I could see no 128gb kits, and I just took it that you just do what I did to utilise the full 4 slots, thanks very much for your input, I will assume I need to look more diligently and find 128gb kit maybe runnijng at 5400mhz.

No worries, still a common misconception. Users tend to get fixated on wanting to fill all available DIMM slots and fall into the same predicament.
Check the QVLon the support site for validated 128GB kits.

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

But to be honest: Reading (or better understanding 😉 the QVL is not really easy for non-expert users... - e.g. there is *NO* 128GB kit on that QVL that is supported!

There are some entries for 128GB kits on that list, but you have to check the last column "Socket Support": And for all 128GB kits it is stated: 1,2: meaning: only 1 or 2 DIMMS are supported, not all 4 of them. So basically ASUS is saying: if you buy this 4x32GB set, we only support it, if you just plug in two DIMMS, but not if you install all 4... but to be fair, most other motherboard vendors do it the same way...

This is like saying: You can buy and pay for 4 sandwiches at a restaurant, but are only allowed to eat two of them 🙂

So if you want to run supported 4 DIMMS with 128GB and up, the only kit is the 4x48GB - this has "Socket Support" for 1,2,4 configurations and also runs fine on my Strix e-e board.