[SOLVED] Can't run RAM at 4000mhz (XMP) on Gigabyte z390

[DeJMan_JB]

I've been trying to solve this since the morning.

So, I enabled XMP in the bios which set the clocks to 18-19-19-39 at 1.35V. However it ends up in boot failure.

I tried enabling XMP and then lowering the speed to 3600 and that seemed to work fine. Can anybody help me figure out why I can't seem to get 4000MHZ even though everything is rated to support it?

***
Motherboard: Gigabyte Z390 Aorus Pro Wifi (Supports 4000mhz RAM) w/ latest bios installed

Memory: (8GBx4 = 32GB) GSkill TridentZ RGB (4000MHZ)

Power Supply: Corsair HX850 (850W)

Processor: i9-9900K

Graphics: RTX 2080 ti

 

[Lutfij]

By latest BIOS, which version are you currently on? We get a lot of users who state they're on the latest but they have one or more updates pending. Have you tried manually inputting the timings, frequency and voltages in BIOS?

 

[Third-Eye]

Memory: (8GBx4 = 32GB) GSkill TridentZ RGB (4000MHZ)

Is this a single 4x8GB kit or two 2x8GB?

 

[Abhinav2005]

Is this a single 4x8GB kit or two 2x8GB?

He means that 4 sticks of 8 GB RAM.

 

[Third-Eye]

He means that 4 sticks of 8 GB RAM.

I was asking if it was two kits, because sometimes mixing kits does not work.