Z490 and F4-4600C18D-16GTZR

[nvt150]

Hello!
Got two identical kits (and batch) of F4-4600C18D-16GTZR which does not run the speeds I desire. I have probably done something wrong,
or beginner error. The system in question is a ASUS ROG Strix Z490-G Gaming WiFi with a i9-10900k, all EPS connected. Latest BIOS.

It does not boot at XMPI/II 4600mhz at 1.45v or 1.50v, even when lowering timings even more. It does boot at 4000 mhz at default timings,
so I worked from there and ended up viewed in attached photo. Stable and runs. But I always want more.

I did find a guide from a guy that plugged and played these sticks with a 8700k.
https://extreme.pcgameshardware.de/t...16gtzr.522399/

Is there maybe a limitation for what the CPU IMC can handle (bad bin), in terms of speed or maybe that it's 4 sticks of memory?
Maybe the motherboard is limiting it ? ROG Strix stuff are generally mediocre at best when it comes to power.

Thanks for any help.

[GSKILL TECH]

That is the highest we have tested for the motherboard:

https://www.gskill.com/configurator?...A74133%20MT/s,

[emissary42]

or maybe that it's 4 sticks of memory? Maybe the motherboard is limiting it?

It is a combination of both.

1) Most motherboards feature a daisy chain DIMM layout. That results in good overclocking capabilities with one DIMM per channel. If you add another module to each channel and therewith also use the secondary memory slots, the memory frequency will be reduced. In some cases just slightly, in others quite drastically.

2) For the XMP to work, a compatible motherboard is required. That is what the QVL is for. Keep in mind that because of (1) and inter-kit compatibility, the QVL is only ever valid for single kit usage.

https://www.gskill.com/qvl/165/166/1...18D-16GTZR-QVL

Looking at the configurator for the Z490-G, your result with four modules of DDR4-4000 falls exactly in the expected range.