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Issue with G.Skill TridentZ DDR 4 32Gb 3600 Kit

Homewrecker
Level 9
I'm running the RVIE with an i9 7940X and 32Gb of G.Skill TridentZ RGB DDR4 (4 x 8GB) 288-Pin 3600 (PC4 28800) P/N F4-3600C16Q-32GTZR Memory.

I've updated the Bios to 0802 as well. The board Posts fine and defaults to a 2133Mhz 1.20V memory setting. With everything else left at default settings I change the Ai Overclock Tuner setting to 'XMP'. The memory specs are detected just fine - 3603 at 16-16-16-36, 1.35V.

When I save and restart, the Post hangs with the display code on the board reading "Code AF: Detect Memory". I have to clear the CMOS and it Posts just fine back into the Bios with the original default 2133Mhz 1.20V setting.

I installed all 4 modules as per the instructions in the motherboard manual (DIMM B1, A1, C1, D1 slots). With XMP enabled I manually override the frequency and can't get past 2800Mhz.

The next step up is 2933Mhz. When I try that frequency the board hangs during POST with "Code AF: Detect Memory". I have to clear the CMOS to get it to boot back to default settings.

I then tried each module individually installed in the DIMM C1 slot as per the manual. Each module behaved the same way. I could not get past 2800Mhz and each one made the Motherboard hang during POST if set to 2933Mhz or higher. The same POST code also appears - "Code AF: Detect Memory".

In the past all one would have to do is bump up the DRAM voltage slightly but from everyone that has posted on the ASUS forums they have no issue with this kit running at 1.35V.

I'm tempted to RMA this kit.
Is there another setting in the BIOS I should change to make this kit work or could this be a bad kit?

Note: This Kit is on the ASUS DRAM qualified vendor list as well.
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31 REPLIES 31

Shamino
Moderator
wouldnt be surprised if the problem goes away with a change of cpu

Homewrecker
Level 9
The CPU is out of stock everywhere as well. Seems to be as rare as the board. So it'll be a while before I can get anything going.