Memory Controller faulty?

[eXecut1on]

Hello,
I built a new PC with the following specs:
Asus Maximus X Hero
i7 8700k
Noctua NH-D15
EVGA 1080 TI SC2
2TB 860 EVO
bequiet Straight Power 11 850W

I tested a G Skill 4133Mhz CL17-17-17-37 and a G Skill 3200Mhz CL14-14-14-34 (2x8GB both kits)

The XMP on the 4133 puts me at 1.4v DRAM, 1.34v VCCIO and 1.3v VCCSA and doesn't pass a 1h test of 1344k Prime95 (however, it passes without XMP being enabled). CPU OC in both cases disabled @ 3.7 Stock. Tried 4.8 as well, no success (CPU OC on its own has no problems)
The XMP on the 3200 puts me at 1.35v DRAM, 1.34v VCCIO (again) and 1.15v VCCSA.

Could this be a sign of a really bad Memory Controller? The CPU looked like it was resealed when I got it (Amazon) but I decided to keep it since I can run stable 4.9Ghz @ 1.28v under full load.

Right now I am testing the 3200 sticks with a manually turned down VCCIO to 1.28v (its set a bit lower in BIOS, shows 1.28v in HWinfo). From what I've seen I shouldn't even need a VCCIO above 1.2 to handle this kind of RAM.
My goal is to be 32h Prime95 AVX with 0 offset stable (no FMA3) @ 4.8/4.9 Ghz and at least 3200mhz 14-14-14-34. If it really is the IMC, should I just return the CPU?

 

[EarthDog]

Faulty, no... 4K memory may need a bit more tweaking than just setting xmp though.

Its common for boards to use too much voltage like that. Part of the reason they do this is not all memory controllers are created equal (perhaps yours is weaker) so they bump tbe voltage in favor of stability. 3200 would likely run at stock vccio and vccsa.

Personally, id return/sell the 4133 and enjoy the 3200.

 

[eXecut1on]

I tried making the 4133 work fiddelling around with the DRAM, VCCIO and VCCSA but no success. Also, I used the 1.34v VCCIO for a week of gaming when I didn't know better. Could that have weakened the MC even further? It had a constant high buzzing sound at that value as well (I thought it's the GPU or some fan). It's gone @ 1.2v VCCIO. It also took a good 5-10 seconds to even boot into the POST screen at 1.34v. Windows login stuttering as well. Anything to worry about? (nothing happens with 1.2v anymore, seems healthy so far)

 

[Mr.Scott]

FWIW, the Hero line of boards typically doesn't handle ram as well as the higher end Asus boards. You might just be expecting too much.

 

[eXecut1on]

Using the 3200 CL14 RAM:

1.3 vcore, 49x
1.2 vccio
1.2 vccsa
1.35 vdram
Avx blender error after 8h

1.31 vcore, 49x
1.2375 vccio
1.2 vccaa
1.35 vdram
Avx Blender error after 6h

1.28 vcore, 48x
1.1875 vccio
1.1875 vccsa
1.35 vdram
Avx blender error after 3h

1.28 vcore, 48x
1.2375 vccio
1.2375 vccsa
1.35 vdram
avx blender error after 2 or 3h

Return mobo and cpu and get a maximus x apex instead? Im not willing to drop below 4.8 ghz and 3200 CL14.

 

[EarthDog]

For 3200mhz? No.

Friend, the gains from 3200 to 4k+ isnt worth the cost of a new board. Its like buying a full race car, but using it for groceries.

 

[eXecut1on]

Managed to get to 15.5h before the first rounding error @ 1.28 vcore 4.8 ghz, 1.35 vdram, 1.2 vccio, 1.2375 vccsa. What would be the next step? Lowering IO to 1.1875 or upping SA to 1.25?

Oh wow, it deleted it previous post when I tried to edit a mistakr on my phone. TL;DR was 1.2375 VCCIO is too high and 1.1875 VCCSA is too low.

 

[Woomack]

I would try CL18-18-18-38 or 19-19-19-38 CR2, 1.35-1.45V, everything else at auto. These modules usually work like that at 4133-4266. Above ~4133 a lot depends on the motherboard, not really on the IMC as every single one I had, could make more than my motherboards. I run 24/7 stable at 4500 with 4266 kit right now but on MSI Z370I Gaming Pro AC.
Interesting is that G.Skill was showing 4600 on Z370 Hero on the Computex but users have problems with ~4133 ... somehow no comments when I asked how it's possible

 

[eXecut1on]

I would try CL18-18-18-38 or 19-19-19-38 CR2, 1.35-1.45V, everything else at auto. These modules usually work like that at 4133-4266. Above ~4133 a lot depends on the motherboard, not really on the IMC as every single one I had, could make more than my motherboards. I run 24/7 stable at 4500 with 4266 kit right now but on MSI Z370I Gaming Pro AC.
Interesting is that G.Skill was showing 4600 on Z370 Hero on the Computex but users have problems with ~4133 ... somehow no comments when I asked how it's possible

Im pretty sure its just the default bull**** XMP settings. I mean 1.34 VCCIO? Come on... Even the 3200 RAM sets my VCCIO at 1.34, but after manual testing I found out I can't even pass 3h of Prime blender at 1.2375. I'll just keep the 3200 CL14, I'm saving 160€ using these and the diff isn't that great anyways. I still need to figure out what my current issue was, whether it was too low Vcore (I doubt it), too low VCCSA or too high VCCIO (I'm tipping on too high VCCIO). Either way, I'm gonna bother with that another time, I actually wanna start enjoying my new system for a while now after all this boring testing heh

EDIT: Ok it seems like the RAM actually made a difference? Fortnite uncapped FPS never caps my CPU or GPU (30% CPU, 40% GPU in most cases) so am I being bottlenecked by the RAM? Im getting less FPS as well. If so, should I just return the Mobo and get a Rog X Apex which is supposed to have support up to 4500 Mhz and try the 4133 on that?

 

[Brando]

i keep seeing posts like this and it brings me back to the suffering old days before i switched from asus to asrock. i wish there was an easy way for me to let the world know to just get a z370 extreme4 and get on with life. 4000+ ram speed no problemo and good cpu oc with low voltage make a pain free experience. can you still return it?