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View Full Version : ROG Z390-F Gaming BIOS with Resizable BAR support for Nvidia RTX 30 series cards



Desperanto
04-14-2021, 02:32 PM
Any one already tried???
https://dlcdnets.asus.com/pub/ASUS/mb/LGA1151/ROG_STRIX_Z390-E_GAMING/ROG-STRIX-Z390-F-GAMING-ASUS-1901.ZIP
Version 1901 Beta
2021/04/14 8.12 MBytes
ROG STRIX Z390-F GAMING BIOS 1901
'Add Resizable BAR support for Nvidia RTX 30 series cards to potentially deliver more performance to gamers in select titles.

Desperanto
04-14-2021, 03:21 PM
Will answer myself: all works fine!
THX, ASUS!

Vintage
04-16-2021, 09:29 AM
Yep works great here with a 5ghz overclock:

https://valid.x86.fr/f7ayxi

vvoid
04-23-2021, 06:24 AM
Not so positive for me. Coming from 1302 my previous settings are not stable. First it wouldn't post because of RTL/IO settings (Auto works though), then it's not stable regarding my oc. Still trying to figure out what has changed, I suppose it's vcore or LLC which is either reported differently, or behaviour really changed. Or it's my custom RAM settings...

Wangeyed
04-23-2021, 04:30 PM
Not so positive for me. Coming from 1302 my previous settings are not stable. First it wouldn't post because of RTL/IO settings (Auto works though), then it's not stable regarding my oc. Still trying to figure out what has changed, I suppose it's vcore or LLC which is either reported differently, or behaviour really changed. Or it's my custom RAM settings...

i wouldnt use previous bios settings coming from such a old version might be better starting fresh

vvoid
04-24-2021, 09:42 AM
Well, settings are settings and usually they should "work" in an absolute sense, no matter the BIOS version. Esp. memory timings. And that's not the case here, I think this might have started from versions 17xy onwards, having read lots of threads about those newer versions.

But I think I've now stabilized it, actually 1901 seems to be _better_ than 1302 in regards to memory oc. The issue for me was not vcore/CPU-related as I initially thought (though there's a slight difference in LLC levels, I'm pretty sure), but memory. Esp. RTL/IO needs to be different and in general, slightly higher freqs (100-200MHz) might be reachable on 1901 for me. But that's beside the point, first prio was to stabilize my previous 1302 timings:
1. Set RTT_PARK to 240 for both channels. (as suggested in some Maximus BIOS threads --> also seems to fix long POST times)
2. Set XMP1 BIOS profile (before I always used Manuel. But I set all timings manually anyway, so I'm not sure this does anything)
3. RTL/IO all Auto in order to POST my previous timings, then proceed as usual to determine the best values. (resulted in tighter settings than what I had before! Don't leave those on Auto if close to the edge!)
4. All other primary/secondary/tertiary timings remained the same, no single regression, bandwith/latency about the same as on 1302 and appears to be stable.

For reference, this is with 4 sticks of good B-Die 3200 CL14, running at 3913 16-17-17-35 with very tight subtimings overall. Currently testing 4013, which didn't POST on 1302, now it does... :)

rexbinary
04-25-2021, 06:53 AM
Well, settings are settings and usually they should "work" in an absolute sense, no matter the BIOS version. Esp. memory timings.

That's not always the case. How the settings are stored and where the settings are stored in memory can and often does change between versions. That's why it's always recommended to start fresh when upgrading your BIOS especially when jumping multiple versions. User profiles are best used as a backup when tweaking and testing settings on the same version BIOS.

DirtyMacho
04-26-2021, 04:46 AM
Its also released for z370-e but where to set the resizable bar . I already updated the firmware for FE 3080 would it not enable by default if both motherboard and gpu have feature unlocked

Bisquit
04-26-2021, 09:49 AM
You have to enable it in bios in the section that contains 4g encoding. Should be a new option below it. I'm gonna update after work. Still a bit cautious since I once blew an asus p8z68 board with a bios update. Did update this board one time to version 1302. So fingers crossed, I already flashed my tuf 3080 oc so now for enabling resizebar.

Enderwiggin03
04-26-2021, 01:34 PM
That's not always the case. How the settings are stored and where the settings are stored in memory can and often does change between versions. That's why it's always recommended to start fresh when upgrading your BIOS especially when jumping multiple versions. User profiles are best used as a backup when tweaking and testing settings on the same version BIOS.

I'm finding this to be the case as well. I was having issues with RAM Training/timings, and the Park suggestions here so far seem to work, as well as manually starting all over after a bios flash.

Bisquit
04-26-2021, 03:50 PM
Ok, flash was successful, lost all my bios profiles but had a backup.
Got the rebar icon in top right corner of my bios screen. Pointing the mouse at it reveals an on/off menu, which enables both Above 4G-Decoding on my z390-F board, and enables resizesable bar, which is shown in the latest gpu-z.

"edit" It's not more stable for me, my overclock needs minor adaptive vcore adjustments to survive my stresstest. I too came from 1302 bios.
My bios also now lists 8 sata ports, I have only 6 physical ones.

gkhann
04-29-2021, 06:02 PM
Ok, flash was successful, lost all my bios profiles but had a backup.
Got the rebar icon in top right corner of my bios screen. Pointing the mouse at it reveals an on/off menu, which enables both Above 4G-Decoding on my z390-F board, and enables resizesable bar, which is shown in the latest gpu-z.

"edit" It's not more stable for me, my overclock needs minor adaptive vcore adjustments to survive my stresstest. I too came from 1302 bios.
My bios also now lists 8 sata ports, I have only 6 physical ones.

same here, bios listed 8x sata port

vvoid
04-29-2021, 06:42 PM
I'm finding this to be the case as well. I was having issues with RAM Training/timings, and the Park suggestions here so far seem to work, as well as manually starting all over after a bios flash.
Actually I think "start all over" is a bit overkill. The main issue with these newer versions seems to be memory related: Training and/or RTL/IOL issues. Those have to be adjusted, together with a few other general adjustments, see my previous post. Pri/Sec/Ter timings can actually remain unchanged.
And after some time now I can state that 1901 is really _better_ than 1302 for me. Running 4013 mem now, whereas 1302 wouldn't do more than ~3950 with identical timings. Only RTL/IO is different, albeit lower than previously! CPU/LLC/vcore is left unchanged, all stable.
So yeah, needs some minor adjustments, but 1901 is actually surprisingly good! :)