Originally Posted by lumbeechief
I wasted my whole yesterday trying to get this too work. This is so discouraging. Intel/AMD should just bin all CPUs or make the official stock speed of the IMC MORE THAN 2666MHz. They know there are ram modules higher than 2666MHz, they know this. Maybe if the Federal Trade Commission/European Commission gets involved this wouldn't be happening. It's anti consumer knowing that customers are buying expensive $400 memory kits and not getting those advertised speeds set by the Qualified Vendor List of the motherboard vendor. Heck, on top of this i wasted over 30 minutes with ASUS on the phone only to hang up because the person never took me off of hold.
There's been a lot of flaming and toxicity in this thread and I would hate for a mod to have to come start cleaning stuff up again. People get triggered on these forums over anything that doesn't conform to their standards.
That being said, memory controllers *ARE* a crap shoot. I've been around awhile and i've seen posts where one person had a CPU which would clock the RAM high, and another CPU sample by the same person which crapped out there. It happens. It's a silicon lottery, ever since the memory controller got moved onto the CPU.
First of all, common sense prevails here.
A "9th gen" CPU does need a Z390 board to work best on. It doesn't matter "why"...bios shenanigans, planned obsolescence, QVL, whatever you want to call it, it simply does NOT matter. What matters is you do your research and conform and make smart decisions, or you just bend over and take it. That's the price you pay for this hobby. Unless you're in bed with a bios engineer, you have no leeway or anything.
Second: if you want to clock highest, you need a board which is designed for it. In that case, a Z390 Apex or Code or another 2 slot dimm board. I'm not talking about the z370 versions here either.
Third: even with that, the CPU can hold you back. This is a fact. You are right that the chips are designed for 2400 mhz - 2666 mhz operation. Intel doesn't QA them for anything higher. That's why they dont list DDR 4133 as official support on any configuration. So yes, you have that correct.
Third: it's just insanity--unless you are rich and bleeding with money, that you or anyone would buy 4400 mhz memory and have that as an all or nothing goal, spending as much on RAM as a typical high end video card. It's simply NOT worth it to buy anything higher than 4000 mhz memory unless you are sitting on cash and have money to burn. And if you have money to burn you would just buy a Z390 Apex anyway and not even bat an eye, since money isn't important. But if money is important, set your sights realistically, don't waste money on Gskill Royal 4600 mhz memory and just buy something more reasonable. That's what I would do. 4133 mhz is the highest I would go personally. 3200 cas 14 for more budget minded people who still want tight timings.
Unfortunately, very few people have access to multiple tray CPU's to test unless you work in a computer shop, and are testing chips to see if they work.
I know this isn't what you wanted to hear but it's the best I can do.