sergmann

I have tested on Z790 Tachyon X with X1a, X7p and X7r, everything works fine with 14900ks. Zarok77 is also with 14900ks on his Tachyon without problems. Also on Z790 non X everything is fine with it. If you are on non X board, F3 Bios is pretty old, I would try new bios for KS last one is 2 days old with better support for 14900KS https://www.gigabyte.com/Motherboard/Z790-AORUS-TACHYON-rev-10/support#support-dl-bios official bios versions for Tachyon X https://www.gigabyte.com/Motherboard/Z790-AORUS-TACHYON-X/support#support-dl-bios

This is one official beta-bios which you was able to download from official page in the past, but you can choose my download folder also https://drive.google.com/file/d/1z0zOxfzvIE6Hrj3SJ0yg95hhoR7vPWww/view?usp=drive_link I would download all beta-bios versions if you like to try it https://www.gigabyte.com/de/Motherboard/B650E-AORUS-TACHYON-rev-10/support#support-dl-bios

your voltages for CPU are to high. Try SA 1.2 / CPU 1,30/1,35 and check if it`s mor stable or not. You can also select directly 8400 profile which is stored in the bios, it works fine as start point

Nice battle 👍

thanks guys, makes fun to bench it

New XOC bios versions works fine with new CPU’s 13th/14th gen. Haven’t tested it on z690 Tachy but my experience is, bios versions are identical. x7p works fine but not with 12th gen CPU’s especially with 12600. With 12900k/kf you can start each board. If you have another 12th gen CPU which can start without any problems, start board with it, select microcode 0x15 save settings, restart system, power it then off and replace CPU without CMOS. After it you should be able to start with 12600l/kf. Regarding AVX512 and 12600k, it works only without e-cores, so don’t wonder if you don’t have avx512 if e-cores are active

Old M-Die works also fine with X7P but don’t forget, old M-DIE can’t boot so high on Air. I was able to bench with 14900k up to 7200 1T and 7600 2T

Thanks guys!

If you mean Non-K CPU`s like G7400, 12100 I guess it doesn`t work. I got 12900k+12600k working but not G7400. Microcode 0x09 is for non-k CPU´s, you can select it, but it isn`t selected on correct way. Only Z790 nonX works fine with aold Bios with non K cpu´s

X7R is just with updated microcode. No biscuits read out at the moment. as soon I have new version with biscuits, I‘ll upload it here

They are no GTL versions with Mem-voltage change available. I have also to adjust it in bios

In the first post you can find new bios version with updated microcode for Z790 Tachyon and Z790 Tachyon X. I have also uploaded first bios release X1a for all ppl who want to try it

New Bios versions X7R for Z790 Tachyon and Z790 Tachyon X + first X1A Bios for Z790 Tachyon X Z790 Tachyon X7R Z790 Tachyon X X7R Z790 Tachyon X X1A

As far I know yes. Some guys from Team AU choose such setups.

Select this profile and go for example to 80 BCLK. Check if you can boot it. If yes go up to 81 and so far to see what is max. if you have found your max boot-frequency on air, press in bios + button to see how high you can go with current settings. Sometimes it’s necessary to adjust Mem voltages for higher frequency as soon you will see red lines or green dots in the bios during pressing + button, you know it’s Mem. If system freezing without error in the picture, you know, it’s the limit of IMC. example for Mem error