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Cant get G.skill kit working on Z370 Maximus X Formula

NarfTV
Level 7
Hi folks,

As the title mentioned i cant get my G.Skill kit stable on my Z370 ROG Maximus X Formula.
Im using it with an 8700k.

kit: F4-3600C15D-16GTZ

Its in the QVL, XMP profile isnt working stable (Karhu is finding errors within minutes)
So i swapped out the kit at the vendor where i bought it believing that it could be a defective kit or something, got a new one and it does the same thing.
I tried manually adjusting VCCIO and SA voltages step by step

1.10v/1.15v, 1.15v/1.20v, 1.20v/1.25v, 1.25v/1.30v, 1.30v/1.32v all this voltages with DRAM voltage paired from 1.35v to 1.45v
Didnt touched the timings, but also tried Mode1 and Mode2, also tried different bios versions. (1003-1602)

All tests are done with CPU oc to 5GHz Cache OC to 4500, and also without any OC on bios defaults with a cache multiplier of 40.
I can only get it stable when using a lower Memory Bandwidth (3466 f.e. works stable when the rest is set to XMP/Auto)

Is my Board defective? Should i return it? Im afraid that the IMC of coffeelake shouldnt be an issue and by already swaping the kit that it has something to do with the board. Every Help is appreciated.

Greetings

John
196 Views
79 REPLIES 79

Silent Scone wrote:
Can you try the Maximus Tweak Modes and see if this helps, before buying another kit? Should be able to dial it in ok with a bit of work.


yea i tried mode1 and mode2 already like mentioned in the original post.

NarfTV wrote:
yea i tried mode1 and mode2 already like mentioned in the original post.


Try raising DRAM voltage to 1.4
Stay in Mode 2, and relax the following by one or two clocks.

TRCD/TRP
tWCL
13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Silent Scone wrote:
Try raising DRAM voltage to 1.4
Stay in Mode 2, and relax the following by one or two clocks.

TRCD/TRP
tWCL


Quite easy fix, i think it works. Atleast a decent solution to get it to work with 3600. It just seems like the board doesnt like tight timings paired with higher bandwidth. Didnt even needed to increase the DRAM voltage. This is probably still worse than just running it at 3466/3500 CL15. But well helps me to understand.

The solution might be to manually overclock the RAM to get the best out of it. I might be able to get something like 4000cl17 or 4133cl18 out of it.

So when calculating CL/Bandwidth like:
3500cl15 (15/1750) * 1000 = 8.57ns (works)
3600cl15 (15/1800) * 1000 = 8.33ns (doesnt work)
3600cl16 (16/1800)* 1000 = 8.88ns (works)

4000cl17 (17/2000)*1000 = 8.5ns (could work?!)

Is there any chance that it somehow could work this way in a not 100%correct theory way?

NarfTV wrote:
Quite easy fix, i think it works. Atleast a decent solution to get it to work with 3600. It just seems like the board doesnt like tight timings paired with higher bandwidth. Didnt even needed to increase the DRAM voltage. This is probably still worse than just running it at 3466/3500 CL15. But well helps me to understand.

The solution might be to manually overclock the RAM to get the best out of it. I might be able to get something like 4000cl17 or 4133cl18 out of it.

So when calculating CL/Bandwidth like:
3500cl15 (15/1750) * 1000 = 8.57ns (works)
3600cl15 (15/1800) * 1000 = 8.33ns (doesnt work)
3600cl16 (16/1800)* 1000 = 8.88ns (works)

4000cl17 (17/2000)*1000 = 8.5ns (could work?!)

Is there any chance that it somehow could work this way in a not 100%correct theory way?


With high frequency kits, it's often nessessary to tune manually.

I think you should just test stability with the adjustments I told you to make if the system now passes POST, and go from there. Sounds like you're running before you can walk. Use RAM Test or HCI Memtest Pro to test stability.
13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Silent Scone wrote:
With high frequency kits, it's often nessessary to tune manually.

I think you should just test stability with the adjustments I told you to make if the system now passes POST, and go from there. Sounds like you're running before you can walk. Use RAM Test or HCI Memtest Pro to test stability.


I did all that... it did post on XMP too, it just isnt stable in Karhu RAM Test, no matter what vccio/sa/dram voltage i type in.
But 3600CL16 works 74759

Im still not happy with it. Hoping for a bios update. Cant be that the z370-P has better DDR4 capabilities.
@Asus any Bios in work to fix this?

erocker
Level 7
Tried it running the CPU at stock?

erocker wrote:
Tried it running the CPU at stock?

yes this is also mentioned in the original post.

NemesisChild
Level 12
For only a 0.07ns difference, running at 3500 CL15 would be a better option.

This should put less stress on the IMC and offer better CPU oc'ing potential (if that's what you're hoping to achieve).
Intel i9 10850K@ 5.3GHz
ASUS ROG Strix Z490-E
Corsair H115i Pro XT
G.Skill TridentZ@ 3600MHz CL14 2x16GB
EVGA RTX 3090 Ti FWT3 Ultra
OS: WD Black SN850 1TB NVMe M.2
Storage: WD Blue SN550 2TB NVMe M.2
EVGA SuperNova 1200 P2
ASUS ROG Strix Helios GX601

FZero
Level 7
Just bought this kit yesterday. Apart from loading the XMP profile everything works from the first try.

FZero wrote:
Just bought this kit yesterday. Apart from loading the XMP profile everything works from the first try.


Are you using the Formula? Your profile says Hero.