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Thread: UPDATED: ASUS Z370 and Z390 Motherboard Series - Official Support Thread Reply to Thread
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  Topic Review (Newest First)
08-24-2019 04:31 PM
DarthFK Well:

1. The 8700k went into the "old" AsRock z370 Taichi with an identical RAM kit (TridentZ 3600c17) and works in dual channel on A2B2 slots [email protected] The thing with this specific Asrock us that it had bent pins limiting A1B1 to stock RAM speed, hence my search for another two boards. Anyway, obviously the 8700k & RAM work on AsRock (T-Topology?). Hence it is definitely the Asus z390-E at fault.

2. The Asus z390-E (that showed successfull AMI [dos/usb] utity flash for one step BIOS downgrade, but then refused to boot in any RAM config with the 9700k) - it doesn't even want to go into Asus Crashfree Bios, a feature it presumably has (fat32 formatted USB, bios name changed to z390e.cap). Any ideas if it's at all possible to force the Crashfree to work? Or I am left with eeprom flashing option only (never tried that)?

I feel like I am going deeper into the rabbit's hole every step I take with this board 😤🤯
08-24-2019 03:18 AM
DarthFK Well, I tried the 9700k with the RAM in A2B2 and had the same issue as with the 8700k - no post and the boot stops before post, at orange led RAM lights.

I then tried 1 RAM stick in B2 and it was again ok. Then I downloaded and tried to downgrade the BIOS via UEFI Ez-Flash utility and it didn't allow me to. So, I used the AMI Flash Utility (USB/DOS) and I got it successfully downgraded and then upon restart it cannot pass the RAM in any slot (apparently is bricked).

Now it shows orange light upon checking, with any stick in any RAM slot and the CrashFree utility does not start (or I am doing something wrong?). It's 6am in the morning and I haven't slept a bit, trying to troubleshoot it, need some sleep. But... Help!
08-23-2019 06:34 PM
DarthFK Thanks Jpmboy for your reply! Understood about ASUS. Too many complaints, I guess.

Well, yes, the Asus z390-E did work with the same RAM in both channels (a2b2/a1b1), with the 9400f hooked up. But I also did wipe the 8700k before installing it. I always clean and inspect any CPU before installing them. So that wasn't the issue.

Very good point on T-topology - I didn't know that. But I've read previously that coolers might do that in some cases, and also initially thought that me overtightening the Be Quet DRP3 might have been a reason for this weird behaviour. I did use a stock intel cooler after that (and before reporting here) just to be sure. Still no joy. So, the cooler/overtightening doesn't seem to have been the reason.

I will, however, try a 9700k in that z390-E and see how it reacts.

After that I'll think about rechecking the RAM with the 9400f and flashing an older CF launch BIOS for a try. Wanted to do that this evening, but just ended my thermal paste yesterday and got an IC diamond 24 (what a mess of a paste, stained my 9400F badly). So today, instead of retesting, had to get to BestBuy and buy some basic Thermaltake TG7 paste till a new Noctua paste gets in. I'll try to see if I can test today - even if Asus is not on this thread, I'll report today or tomorrow, to keep you posted and anyone who might have a similar issue aware.

Thank you for your help and ideas!
08-23-2019 04:44 PM
Jpmboy Yup, it is. NO ASUS tech support here (lately). It seems like you got a bad/bugged board off ebay... that would piss me off too.



"9b" in your description, I'll assume that the 3600c17 sticks worked in any of the (2) dual channel configurations with the 9400f? If yes, clean the bottom of the 8700K with alcohol, remount it and be sure to not overtighten the cooling block. The giga board uses a serial ram layout (afaik), and the ASUS 4 slot board uses T-topology... which seems more sensitive to over or uneven tightening around the socket. You could try flashing back to an earlier bios version - the first supporting CFL. Since your board is second hand, well you could try an ASUS support ticket if you think that will help. Or try the ROG Channel on Discord.
08-23-2019 01:28 PM
DarthFK If this is the "official" Asus support thread, is there an @asus rep to answer my question, please?
08-23-2019 07:46 AM
DarthFK
Quote: Originally Posted by Jpmboy View Post
check the z390-e for bent socket pins.
Yeah, first thing checked. No bent pins. And i5-9400F works, but i7-8700k doesn't.
08-23-2019 06:35 AM
Jpmboy check the z390-e for bent socket pins.
08-22-2019 06:50 PM
DarthFK HELP!!!!!! My ASUS Z390-E refuses to cooperate with my 8700k. Each work in different combos, but not together!

The BIOS is latest. EDIT - No bent pins!

So, I recently purchased a combo of an i5-9400f & ASUS z390-e over ebay (open box). The plan was to "upgrade" the CPU to a delidded 8700k I had running in my son's machine. But now I have encountered problems, perhaps Motherboard, perhaps CPU related, I can't understand this weird behavior:

I tested the z390-E with the i5-9400f and two sticks of G.Skill TridentZ RGB 3600c17 upon purchase, several weeks ago. All 4 RAM slots were tested (one pair then another pair), all went fine.

Just yesterday I tested the same 8700k on another solid board for my another build (Mobo GB z390AorusUltra) and it worked fine with the same kit. All 4 ram slots were tested, in dual channel mode again, and no problems.

Today:

1. I cleared CMOS, placed the 8700k into ASUS z390-E and RAM into recommended slots A2-B2 - orange RAM led turns solid, no post.

(Every time I cleared CMOS again after each RAM slots change that followed)

2. Tried one stick in RAM slot A2 as per ASUS single channel placement (mobo manual) - orange led on, no post.

3. Tried two sticks of RAM in A1-B1 - orange led on, no post.

4. Tried only one stick of RAM in A1 - orange led on, no post.

5. Tried only one stick in B2 - all fine, went into post & UEFI(!)

6. Tried only one stick in B1 - all fine,
went into post & UEFI.

7. Tried two sticks in B1-B2 - all fine, well, single channel - went into post & UEFI (yes, I then loaded optimized defaults)

8. Without clearing CMOS immediately tried ASUS recommended A2-B2 two sticks - no joy [IMG class=inlineimg]/forum/images/smilies/frown.gif[/IMG]

9. Cleared CMOS, tried A2-B2 again. Orange led, no post again.

9b. Took out 8700k, installed the 9400f and everything's fine, RAM works, PC boots into UEFI & Windows.

10. Installed the 8700k into Z390 Aorus with the same RAM kit in slots A1-B1 and it works fine,

11. installed the 8700k back into ASUS and no, it refuses to post!!!

This was written between all these attempts. Latest Asus z390-e Bios. The socket is clean. Argh!

- If 8700k works with the same RAM, in dual channel, on a z390 Aorus Ultra,

- and ASUS works fine with this RAM and 9400f,

- why on Earth doesn't ASUS Z390-E works with the 8700k and this RAM???!!!

P.S. And I did used a different RAM kit (ADATA XPG 3000C16) and still the same problem.

P.P.S. My PSU is EVGA 850P2 and I changed two cables on two different connectors to the CPU power socket, just to make sure. Still, this is the same PSU that works fine with 8700k & z390 Aorus.
08-20-2019 04:31 PM
Jpmboy
Quote: Originally Posted by Ziver View Post
I have a very odd problem ! Maybe you can help me . I can manage to get 5.1Ghz stable With 1.32v and temps are not going above 82c. But this is before change my rams :/ When im using Corsair 32GB 8x4 3200Mhz RGB Pro , everything good and stable with 5.1Ghz. But after change my rams to 8x4 Corsair Dominator RGB 3200mhz, i cant get stable at 5.1ghz. I tried diffrent vccsa and vcsıo voltage nothing change. But when try 2 stick again i can get 5.1GHz stable but tried 4 stick again i cant do 5.1ghz. Now i can do 1.288v 5.0ghz without problem.

Why i cant do it with 4 stick Dominator ?

9700K
Asus Maximus Hero Wifi Z390
Corsair H150i Pro
the only difference in that ram swap is "Pro"? Did you try lowering the cache multiplier with the new sticks with the core at 5.1 (and the previously good 5.1 vcore)? Cache draws from vcore and it's affected by differences in ram ICs.
08-16-2019 12:17 AM
Ziver I have a very odd problem ! Maybe you can help me . I can manage to get 5.1Ghz stable With 1.32v and temps are not going above 82c. But this is before change my rams :/ When im using Corsair 32GB 8x4 3200Mhz RGB Pro , everything good and stable with 5.1Ghz. But after change my rams to 8x4 Corsair Dominator RGB 3200mhz, i cant get stable at 5.1ghz. I tried diffrent vccsa and vcsıo voltage nothing change. But when try 2 stick again i can get 5.1GHz stable but tried 4 stick again i cant do 5.1ghz. Now i can do 1.288v 5.0ghz without problem.

Why i cant do it with 4 stick Dominator ?

9700K
Asus Maximus Hero Wifi Z390
Corsair H150i Pro
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