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Z790 1402 BIOS

Level 9

Any thoughts on latest Z790 BIOS 1402? 


Level 8

Hi everyone, I currently have bios 1303 installed and I have no problems with it. I avoided updating to bios 1402 as many here and in other forums have said that it brings instability to the system, let me know if it is convenient to update to the one released: 1501.
I currently have i7 13700KF, RTX 4080 OC, ram 6000 mhz 2x16 GB, Asus ROG Strix gaming-F wifi

I think you'll do best with the 1303. I'm back from 1402 to 1303 and will definitely stay there until 1602 or so. You can safely skip 14 and 15, I'm sure.

Ok thank you for the information and for the clarify, It's the first time I've seen 2 bios versions released in the same month. The Asus technicians are probably doing everything they can to guarantee stability for the new 14 series CPUs, but I won't do any upgrades as they provide little performance compared to the current CPUs.

Level 9

I see the 1501 bios is up for Z790 Maximus Hero. Will try it out later and see if it's better than 1402.. 

Level 8

1501 is also a downgrade from 1303 from RAM stability, I'm not sure what they have changed from 1303 but I had to rollback my BIOS from 1501 back to 1303.

Basically, I tried some of the new Corsair Dominator Titanium M Die 3x32GB at 6800 (it's rated at 6600 for XMP) with Corsair's recommended specs which can be seen on CPU-Z (32-40-40-40-96) with the same primary timings. For secondary timings for anyone wondering what secondary timings I used, it's DRAM REF Cycle 2 - 450, DRAM REF Cycle Time Same Bank - 350, DRAM Refresh Interval - 13500 and tWRPRE - 96, for voltages 1.45 for both VDD and VDDQ, SA voltage 1.275, it reduced the latency on AIDA by around 8-9 ns. These timings have been thoroughly tested (on the 1303 BIOS with some TM5 profiles, OCCT tests etc)  and it was continuously going through a boot loop. it boots at XMP II 6600 but 6800 just wouldn't post, even when I just put in XMP II not messing with the secondary timing and just upping the speed to 6800 and changing the CAS to 34. Motherboard I'm using Z790 Maximus Extreme with a 13900k.

Level 9


Can someone with an Asus Z790 mainboard tell me which microcode version is included in BIOS 1402?


The microcode version depends on which CPU you use.

Intel Core i7 13700K / AiO Fractal Design Lumen S36 v2 RGB / Asus Rog Strix Z790-F Gaming WIFI / Corsair Dominator Platinum DDR5-5600 64GB (4x 16GB) / Asus TUF RTX 4070 ti OC / 4x Samsung 980 pro 1TB / Seasonic Prime GX 850 W Gold / Fractal Design Meshify 2 Lite RGB Black TG Light Tint / Monitor AOC Q27G2S/EU (WQHD)

Level 9

I still need to know which version of the CPU microcode comes with BIOS 1402

Please guys, this doesn't require much effort. You can check that with HWInfo.


1501 uses 11D.