Question Cannot run 64GB (4x16GB) G.Skill RAM on default speed on Z390-E

[Woeters]

Hi guys,

So I just bought a set of G.Skill Ripjaws V 64GB (4x16GB) DDR4 3600 C18 F4-3600C18Q-64GVK to run on my ASUS ROG Z390-E, but it will not run on the default 3600MHz @1.35V.

I've tried XMP 1 and 2 settings, but it will simply run the 'MemOK' loop until it cannot find a suitable profile and return to UEFI. The maximum speed I can achieve is only 3400MHz, on which it runs stable during stress and benchmark tests. Because I thought there was something wrong with the memory set, I received a replacement set which does the exact same thing, so it's not due to faulty memory.

After mixing and matching different banks, I come to the following conclusion. Using only 2 banks (2x16GB in any configuration) it runs perfectly fine even at 3800MHz. As soon as I use 3 or 4 banks in any configuration, 3400MHz is the limit, regardless of XMP settings or Voltages. At 3466MHz with RAM at 1,45V it can get past the initial boot, but will cause an instant blue screen even before logging into Windows.

Increasing VCCIO and/or system agent voltages up to 1,4V had no results. Turning off MemOK on the motherboard results in the yellow DRAM LED to light up seizing the boot sequence.

Any ideas what may cause this issue?

 

[JohnBonhamsGhost]

Any ideas what may cause this issue?

check the ASUS compatibility chart for the ROG Strix Z390-E Gaming.

if this particular F4-3600C18Q-64GVK set is not listed,
it's likely that others had already found there was an issue with it running on this particular board.

 

[Satan-IR]

Welcome to the forums!

Bad luck with MOBO+CPU combo? Quoting from MOBO page here: "Hyper DIMM support is subject to the physical characteristics of individual CPUs."

Maybe a BIOS update will help, if not running the latest verison already. I'd leave it at 3400 though. I know it's not ideal with the purchase but that extra 200Mhz doesn't make a real dent in performance really.

Also the model you listed F4-3600C18Q-64GVK is not listed in the RAM QVL here under 3600Mhz support on the Asus website. Probably tested before and not worked. So the BIOS update maybe moot.

Or if an option RMA the ones you have and get RAM that is on the QVL list.

 

[Woeters]

check the ASUS compatibility chart for the ROG Strix Z390-E Gaming.

if this particular F4-3600C18Q-64GVK set is not listed,
it's likely that others had already found there was an issue with it running on this particular board.

Thanks for the suggestion, I don't see this particular one on the QVL. I do see a few others in a similar configuration from G.Skill:

G.SKILL F4-3600C17Q-64GTZ 64GB(16GB*4)
G.SKILL F4-3600C17Q-64GTZSWB 64GB(16GB*4)
G.SKILL F4-3600C17Q-64GTZKWB 64GB(16GB*4)
G.SKILL F4-3600C17Q-64GTZR 64GB(16GB*4)

Does this really mean that that's the reason why it doesn't work?

Welcome to the forums!

Bad luck with MOBO+CPU combo? Quoting from MOBO page here: "Hyper DIMM support is subject to the physical characteristics of individual CPUs."

Thanks! I see, so this could even be CPU related?

Maybe a BIOS update will help, if not running the latest verison already. I'd leave it at 3400 though.

I am running the latest BIOS unfortunately, and you're probably right as far as running it on 3400Mhz. I also just found out that I got a pretty good deal for the set (€120), if I had to buy the same kit again today it would be €170 at least. I still have a week and a half to think about whether or not to return it.

I always thought the QVLs were more like a 'recommendend' list, I guess I learned my lesson!

 

[Woeters]

Maybe a BIOS update will help,

I was convinced I had recently updated the bios, that must have been another PC. Just updated and it works like a charm up to 4000MHz! Great help, thanks a lot.

 

[Satan-IR]

I was convinced I had recently updated the bios, that must have been another PC. Just updated and it works like a charm up to 4000MHz! Great help, thanks a lot.

No problem, glad it worked out.

I always thought the QVLs were more like a 'recommendend' list, I guess I learned my lesson!

They actually are like a 'recommended list' more or less.

But the RAMs listed in those are the ones that have been actually rested on the boards and will most probably work at the values they're rated for. So if you get RAM that is onthe QVL list chances of it not running as it should are pretty slim.