Z590 maximus hero bios 1801

[Marecki_]

Hello, after updating bios to 1801, rollback to  version earlier than 1701 is not possible. For me best version is 0902, motherboard post very quickly.

I'm furious is there a way to bypass this, modify a bios file or something else?

I tried ez flash and usb flashback.

sorry for my english

[Retry]

Visit here.

https://rog-forum.asus.com/t5/intel-500-400-series/maximus-xiii-apex-z590-bios-1601-1701-1801-issue-...

[freddy8555]

Does 1801 have the mitigation for the downfall security voulaberly? If so I will skip it, as I have read the fix affects the performance in a negative manner. 

[PerpetualCycle]

No, you need newer microcode than is available in the 1801 bios ( for instance F8 for 10900k) for downfall mitigation. That microcode is what mitigates the vulnerability and impacts performance.

[Districtor_2]

ROG Hero XIII 1801 still has Microcode Revision 0x54 for Rocket Lake, which was already included in 1402 and maybe before. I don't know which version is included in 1903, but it should be different.

[PerpetualCycle]

Here are the microcode versions in 1903  for the Hero XIII

 

[Districtor_2]

Thank you,

so it would be Rev 57 for my A0671 i7-11700.

[PerpetualCycle]

Anyone brave enough to try the new 1903 BIOS that came out today?

[Taint3dBulge]

Im still waiting to see what people have to say about it. Was just going to update to 1801 lol. 1701 has been pretty good. 

[sdmf74]

Yep same here was gonna flash 1801 have just been putting it off cause I'll have to redo all my OC's. Definately not killing 50% (in some scenarios) of the performance I paid for. Even a 10-15% perf hit is UNACCEPTABLE. 
Class Action perhaps!

[PerpetualCycle]

What is odd is by the release notes for 1903, I thought this would be a fix for the Intel downfall vulnerability, which requires microcode F8 on my CPU, but 1903 has F4, which is the same microcode for a while now. Must be something else - they should be more specific.