I didn't buy DDR4 4000.
I bought 2x16 Gb 3200 MHz micron E Die for £150 and it overclocked to 4000 MHz CL18 on both my Asus Z370 (I accidentally damaged the pins) and Z390 (stuck screw and broken CMOS).
Specs on the Gigabyte board I got said it supports 4400 MHz but doesn't even boot at 3400 MHz.
Do me a favour then to check - download memtest for free and open it, and tell me if it still says you have 2 populated dimms plus 2 empty ones. This is what it shows for my Gigabyte board. If that's the case then the board has not been optimised for 2 ram slots, they simply remove two but the board still has connections and operates as though it has 4 so it doesn't work any better. Asus boards with 2 ram slots fully disable all the hardware for the two extra slots, so all the power delivery and whatever else goes to just those two slots.
The specs that are listed on the board are usually only tested with 8 Gb ram sticks, and there are no power delivery optimizations for just two slots do enable what such Asus boards can pull off with higher density sticks.
Gigabyte is a shit budget brand. Since you keep referencing that, it sounds like you bought a budget MSI board sometime in the past and expect everything in their lineup to be cost cutting like that board. ASUS makes shit too, but they also make quality. MSI is on the same level and has honestly served me 10X better than anything ASUS has ever made. Thing is I understand that just my experience.... not the rule. So I'm not going to waste my time for a fanboi.
No mate I bought a £450 MSI godlike in the past and it stopped booting in less than 6 months. Don't want to touch MSI again after that.
I'd rather take stuck screws than Motherboard that fails to boot at such a price.
And like MSI has served you better, other than the stuck screws Asus continues to serve me better. The motherboards don't fail at least and they overclock the most from all the brand's I have tried.
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