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Hey guys ,
I've updated Z390 aorus pro Bios yesterday (*F12d modded --> **F12l modded) ,
A huge performance drop with memory/cache speeds & latency

So If there anyone else with Z390 aorus pro can confirm this pls.

*F12d modded - KedarWolf's.
**F12l modded - KedarWolf's + SPD write disable (modded by me).

Thanks ,
Do this with same Aida64 version (North bridge clock also different and maybe something else).
 

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Do this with same Aida64 version (North bridge clock also different and maybe something else).
Hi @stasio ,
I did re-test on same Aida64 build with Uncore ratio = 45x , usually I don't change my stable OC settings specially Memory related .
The only change I did is installing a macOS alongside windows 10 using OpenCore .(which I couldn't figure if it's related to this issue) .
If no one else can confirm this issue , I will re-flash F12d Bios without the macOS drive to confirm this .
Regards ,
 

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Hello!

Has anyone good overclock advices on 3200 cl14 kit at this board?

I have 9900ks 5.1ghz, 4.8 cache full stable at games not sure avx prime tho. I can boot my kits 4000 16-16-16-36 and 4100-4000 17-17-17 @1.46v, but i get errors with Karhu's effective ram tester.

I have no clue what kind off settings I should try to overclock my rams to get maxium cpu bottleneck off. I play fps games like Valorant at 1080p 240hz.

I have tried 1.4-1.5v dram voltage and vccio/vccsa 1.2-1.3v.


EDIT: Motherboard Z390 Aorus Master
 

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Have you try a different memory teseter like testmem5. From what I believe your mem test is old and out dated unless there has been a update?
 

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Have you try a different memory teseter like testmem5. From what I believe your mem test is old and out dated unless there has been a update?
No i haven't. Finnish overclockers believe that karhus ram test is still best (fastest to find errors). But yeah maybe i should try other ram tests too. Or maybe i have just bad silicon lottery kits. I can boot almost anything but nothing is 100% stable..
 

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@stasio I figure it out .
Hyper-v and Sandbox were the cause of all the issues related to memory and cache performance ( latency & speed ) ,even though Virtualization was turned off in bios .
Thanks ,
 

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Ok thank you. So maybe i just should upgrade to 11700k + asus hero or something to get good oc also on memory and sell this grab gigabyte board
Last thing, you are disabling memory fast boot when doing all this?

Also that is a big jump from the original overclock for them sticks from what was originally tested. Shocked you can get them over 4000. They must get real hot too.
 

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Ok thank you. So maybe i just should upgrade to 11700k + asus hero or something to get good oc also on memory and sell this grab gigabyte board
If you're serious about getting every last bit of performance and have the money, sure why not.

I went the cheaper route, sold my 2x16 and got 4x8, now I'm at 4133c17 1.4v ~39ns
 

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If you're serious about getting every last bit of performance and have the money, sure why not.

I went the cheaper route, sold my 2x16 and got 4x8, now I'm at 4133c17 1.4v ~39ns

Thats not really that good for 4133 also for 4 sticks you have to pump much more voltage into a 9900K/9900KS
im running 2 x 32GB Crucial Ballistix 3600 (BL2K32G36C16U4B) @ 15-17-17-34 560 CR1 1.35v for 39.3ns with a 9900KS Uncore 47

I was running 2 x 16GB Crucial Ballistix Sport LT 3200 @ 3500 16-18-18-36 560 CR1 1.35V Uncore 47 for about a year and it was 100% stable
I ordered 2 more
and even though i would pass memory tests i always had random crashes at 5ghz LLC Normal DVID -0.035mv with 4 sticks
if i pulled either set of 2 out it was 100% fine
if i Bumped DVID to +0.00 it was much better but still not 100%
if i dropped to CR2 it was much better but still not 100%
if i dropped the uncore to 43 it was much better but still not 100%
adding vccsa or vccio or memory voltage did nothing

If you are serious about the best latency and performance even on t topology boards you need to keep to 2 sticks
no matter what people tell you

I Had a Z390 M Gaming and just couldnt get it 100% stable with 4 sticks at my stable timings and voltage for 2 sticks
Replaced it for a Z390 Aorus Master as i put it down to the board and it was still the same

Crucial Ballistix 64GB 3600 Kit came into stock and thought f it and replaced my
4 x 16GB Duel Rank 3200 for 2 x 32GB Duel Rank 3600

and its been 100% fine ever since 4 sticks was a nightmare for stability with tight timings and low voltage

also going from 2 x 16GB Duel Rank to 4 x 16GB Duel rank or 2 x 32GB Duel Rank to 4 x 32GB Duel rank
looses you around 2ns at the exact same timings

now with 4 x Single rank i have no idea if its the same or not single rank may well be fine

but if i ever want to go 4 x 32GB 15-17-17-34 560 CR1 1.35v Duel rank i will have to bump my Vcore about 0.045mv
which im not willing to do as with a prime 95 avx small fft load that becomes uncoolable to keep below tj max


It will do 39.3 ns if i keep trying
Cores 1-5 52, Cores 6-7 51, Cores 8 50, Vcore Normal,DVID -0.035mv, LLC Normal

 

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I confirm what you say, on aorus master I have 4 x8gb ram crucial 3600 if you remove 2stick the latency value is better
so it's weird they say t-topology cards work better at 4 ram also tested on z390 ultra same result 2 ram better than 4 stick
e it doesn't matter at what frequency and at what voltage. What I noticed, however, is that from the bios f11 the ram performance has
slightly decreased so it could be a question of bios and not just the motherboard,
 

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Last thing, you are disabling memory fast boot when doing all this?

Also that is a big jump from the original overclock for them sticks from what was originally tested. Shocked you can get them over 4000. They must get real hot too.
Havent tried disabling memory fast boot... My max dimm temps are 48C at gaming sessions for example @ 4000 16-16-16-36 1.47v. But yeah its not 100% stable so using xmp profile :3

If you're serious about getting every last bit of performance and have the money, sure why not.

I went the cheaper route, sold my 2x16 and got 4x8, now I'm at 4133c17 1.4v ~39ns
Could try 4x8 but 32gb is overkill in my case :D never hit over 10gb at my usage
 

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Well if you haven't disabled memory fast boot, memory training my be skipped and new setting may not be set. You must disable it until you've tweaked ya memory. Then once tweaked boot 2-3times then you can enable memory fast boot. That will then disable memory training and keep the set timings.

Also if you play games like anno 1800 it will munch 32gb ram
 

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In my case, I cannot get 4266mhz stable even with very high dram voltage sa/io (+1.50v - 1.4 sa/io)

With dual rank 2x8, this is the best that I can get:



1.45 DRAM
1.25 SA/IO

9900k 5ghz/4.7ghz cache

Tried 3900 with lower latency like CL17 (anything below isn't stable) but for gaming I prefier higher frequency for higher minimum fps.
 

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Hello!

Has anyone good overclock advices on 3200 cl14 kit at this board?

I have 9900ks 5.1ghz, 4.8 cache full stable at games not sure avx prime tho. I can boot my kits 4000 16-16-16-36 and 4100-4000 17-17-17 @1.46v, but i get errors with Karhu's effective ram tester.

I have no clue what kind off settings I should try to overclock my rams to get maxium cpu bottleneck off. I play fps games like Valorant at 1080p 240hz.

I have tried 1.4-1.5v dram voltage and vccio/vccsa 1.2-1.3v.


EDIT: Motherboard Z390 Aorus Master
For my memory I found that 3900C15 gave the best overall performance with lowest latencies. That is the highest I would aim on your 3200 C14 kit. I also strongly suggest to use the Modded F11m bios as I found that one to be rock stable with decent speeds. Apparently the F9 bios was best for memory overclocking but I wouldn't recommend going back that far for small increase you might get overall.

There is also a github memory overclocking info sheet that is quite useful in getting to understand the basics and rules of memory overclocking but it was a while back I used it and can't seem to find a link for it now but maybe some other kind users will.
 

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There is also a github memory overclocking info sheet that is quite useful in getting to understand the basics and rules of memory overclocking but it was a while back I used it and can't seem to find a link for it now but maybe some other kind users will.
 

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Since revision F11n of the Z390 BIOS it is supposed to support the resizable BAR options, along with other factors needing support. If that is the case (I'm using F11o) where is that option in the BIOS to enable it, I just can't see that...?

Hopefully it will work, if and when MSI update the VBIOS (for me), and that'll also support to the 9900k.

Thanks
 

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Since revision F11n of the Z390 BIOS it is supposed to support the resizable BAR options, along with other factors needing support. If that is the case (I'm using F11o) where is that option in the BIOS to enable it, I just can't see that...?

Hopefully it will work, if and when MSI update the VBIOS (for me), and that'll also support to the 9900k.

Thanks
Enable: Above 4G Decoding in the bios
 
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