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4000hz or close to! G.SKILL TridentZ Series 32GB DDR 4

bowman9991
Level 7
I have a G.Skill R32GB RAM that I'd like to get running at the 4000hz advertised speed (RAM specs below).

Having real trouble trying to set them manually (XMP I and II both failed as presets in the BIOS).

Does anyone have a guide using the ASUS ROG bios to set DRAM? Seems anything but straight forward on how to manually set timings, etc.

Any help appreciated. Thanks. John.

RAM SPECS
G.SKILL F4-4000C19D-32GTZSW
Timing 19-19-19-39
CAS Latency 19
Voltage 1.35V


MOTHERBOARD:
ROG Maximus Geni
i9 9900k CPU
Running at 5ghz after applying TPU insight.
1,703 Views
3 REPLIES 3

Nate152
Moderator
Hi bowman9991

32GB 4000MHz may be tough to hit, try setting it manually again.

1) AI Overclock Tuner - Manual
2) Dram Frequency - 4000MHz
3) Dram voltage 1.40v (up to 1.50v is safe)
4) CPU VCCIO voltage - 1.20v - 1.25v
5) CPU System Agent voltage - 1.20v - 1.25v
6) Go to Dram Timing Control - At the very top enter the primary timings:

19
19
39
Command Rate 2

7) F10 and Enter to save and Exit

If it still doesn't want to go, on the primary timings page try Maximus Tweak Modes 1 and 2.

Maximus Tweak Mode 1 - Helps with Compatibility
Maximus Tweak Mode 2 - Helps with Overclocking

bowman9991
Level 7
Thank you! I will give this a go when I get home tonight.

I have similar issue, but I got 64gb (2x32gb kit) of same memory.
I don't know if memOK kicks in while POST is failing and didn't tried it with 1.25v vccio and vcsa manually, I just tried different settings and my memory started with 3600 17-17-17-37 @1.35 without any problems.