Need help stabilising RAM OC on MSI Titan 18HX

Posted April 17

Hello,

Recently upgraded my GT77HX Titan 13980HX 4090 to MSI Titan 18HX 14900HX 4090 (had good opportunity to do it with next to no loss)

Unfortunately (but fortunately) the laptop has 4 DIMM slots, which means that overclocking is somewhat limited as it's quad RAM board.

I currently have 2x16GB DDR5 6400 CL38 XMP modules (using those for gaming)

I also have 4x48GB 5600 modules (Productivity, swapping when needed)

Currently trying to get to at least 6000Mhz stable on the RAM.

The current settings that work and pass Memtest86 are linked to this post.

Essentially when I even attempt to sent 5900 to memory ratio I will get a flashing power button on and off. Then I have to hold it for 40 sec for CMOS reset to try fresh.

However, if I copy XMP settings from one of the XMP profiles (6000Mhz CL38 Profile) it will boot and work, just crash often in games and Memtest86 will produce some errors which result in WHEA in the Event Viewer.

Can anyone pinpoint what I can do to stabilise?

1.35V 5800Mhz CL38 is stable, tried raising tRCD/Trp to 42 but I would wake up to 10000 Memtest errors.

Tried raising and reducing Trefi but system would never boot it I would get flashing power button.

Any help appreciated.

Main PC:

CPU: Intel Core i9 13900KS SP 116 (124P-102E) (6.1Ghz P-Cores 4.8Ghz E-cores) MC SP 88

CPU Voltage: LLC8 1.525V (real voltage 1.425V + - Temps 85-90 P-Cores, 70-73 E-cores)

Cooled by: Supercool Direct Die 14th gen full nickel

Motherboard: Z790 ASUS Maximus Apex Encore

RAM: GSkill TridentZ 2x24GB DDR5 8600Mhz CL38 (OC from 8000Mhz CL40)

GPU: RTX MSI 4090 Suprim X with EKWB waterblock

Case: My own case fabricated out of aluminium and wood

Storage: 4x 2TB Sarbent Rocket Plus Gen 4.0 NVMe, 1x External 2TB Seagate Barracuda (Backup)

WiFi: BE202 WiFi 7 Tri-Band card module

PSU: Corsair AX1600i with custom black and red cables with 2x Corsair 5V+ Load Balancer

Display: Samsung Oddysey G9 240Hz Ver. 5120x1440 with G-Sync and Freesync Premium Pro 1008 Firmware Ver, and 1x Electriq USB C 1080p 15'8 inch IPS portable display for temperature and stats, MSI 23'8 144Hz G-Sync

Fan Controllers: 6x AquaComputer Octo with 5 temperature sensors

Cooling: Three Custom Loops:

1st Loop: 5x 480mm XE CoolStream radiators with 1x Revo D5 RGB pump and 1x Rajintek Antila D5 Evo RGB pump for GPU only cooling with 2x Koolance QDC3, red coolant

2nd Loop: 5x 480mm XE CoolStream radiators with 1x Revo D5 RGB pump and 1x Rajintek Antila D5 Evo RGB pump for CPU only cooling with 2x Koolance QDC3, purple coolant

3rd Loop: 1x 240mm PE CoolStream radiator with 1x EKWB Revo D5 pump (RAM ONLY)

Total: 5x pumps and 13x radiators 50x 3000RPM Noctua Industrial fans

Keyboard: Razer BlackWidow V3 RGB - Green switches

Sound: Logitech Z680 5.1 THX Certified 505W Speakers

Mouse: Razer Basilisk Ultimate Wireless with charging dock

Piano: Yamaha P155

Phone: Oppo Find X5 Pro

Camera: Logitech Brio Pro 4K

VR: Oculus Rift S

External SSD: 256GB Overclocking OS

Laptop: MSI Titan GT77HX V13, RTX 4090 175W, i9 13980HX OC: P-Cores 5.8Ghz 3 cores and 5.2Ghz 5 cores and E-Cores 4.3Ghz, 192GB of RAM @5600Mhz @3600 (chipset limit),

12TB (3x4TB) of NVMe, 17'3 inch 4K 144Hz MiniLED screen, 4x 17'3 ASUS portable USB-C Monitors 240Hz, Creative Sound Blaster G6 Sound Card, Portable 16TB NVMe in TB4 enclosures (8x2TB), Razer Basilisk Ultimate Wireless with charging dock gaming mouse, Keychron K3 gaming keyboard with blue switches low profile, Logitech Brio 4K Webcam.

Hand held: ROG Ally with XG Mobile RTX 3080 with Keychron K3 low profile keyboard (Blue Switches) and Razer Hyperspeed V3 mouse and 4TB NVMe upgrade (WDBlack SN850X), with 100W 20000Mah power bank and portable monitor ROG XG17AHP 17'3 inch 240Hz with built in battery, and 518Wh Power station for Camping.