MrPils

CO is fine, as far as Im aware though the bios I modded and posted earlier in this thread is the only one available. In terms of limitations, comparing to the Apex the Unify ITX isnt as good with per core overclocking, im around 100mhz lower than I was on the Apex. I suspect this is the Apex being good rather than the Unify ITX being "bad". Memory OC is ridiculously easy. My rev 1.1 board struggles with 1T but 2T is ridiculously easy. I can't get 7k stable, but with locked vccsa that's not a surprise. 6950mhz at stock cpu is stable, 6900mhz at full cpu oc. My current stable 6900 daily (ignore tertiaries, screenshot was during tuning) and my 6950mhz 3dmark settings are attached - apologies for the resolution you'll have to open them in a new tab and zoom.

My Apex is clearly inferior to my z690i Unify for memory oc. I paid £350 for the Unify ITX, which is still high but much cheaper than the Apex. Seems to be large board to board quality variance with the Apex. There are some really good boards no doubt but with so much in the media and forums about Asus sending pre-binned boards out to people it makes sense why there's large amounts of trash boards in retail. You can bet those pre-bin failures go straight in a box and off to retail and not into recycling where they belong. Kingston Beast 6000mhz C40 is all Hynix as far as has been reported on the internet (you can check without opening, code ETMH on the sticker for hynix, ETMS for Samsung. This is like 3200C14 bin B-die, quality will vary but all will behave as Hynix and not the shitshow that is Samsung chips. This is the cheapest Hynix available here in the UK, you can find them on sale between £260 and £300. This is still not cheap, but you do get the arguably better memory oc board and a 2 x 16gb kit of Hynix for around the same price as the Apex alone. You lose PCIE slots and a ton of vcore phases, but for fun with non-K cpus you dont care much about that

12100 should all be H0 stepping I think, so for MSI the Unify-X with A22TH or the Unify ITX with the modded 124 bios posted by Birilio above. For Asus on z690 the Extreme, Apex and Hero using bios 0811 or various beta's between 0072 and 0096 (some do some dont). Haven't tried anything newer or seen anyone posting on anything newer. On B660 I think only the top two ATX and mATX ROG boards, the Strix B660-F and the Strix B660-G. Not sure which bios version, its in Der8auer's second video on YT. Just bear in mind the microcode isn't the best for memory. On the Apex I managed 6180 1T c28 1.45v/1.41v/1.41v stable, nothing I did would get it fully stable higher but it could 3d mark up to 6400 or so with more volts. 6460 2T was stable and would 3dmark up to 6570 on a good boot same voltage. Unify ITX with 124 modded bios went about a hundred mhz higher than the Apex at the same voltage, but still behaved the same. Both boards wouldn't go any higher even with clear voltage and timing headroom that gave improvement when not using the unlock microcode. For example, the z690i Unify using 124 unmodded went 6933 2T stable easily using the same voltage set with trcd43, only change being microcode and MC voltage.

Went with 124 to avoid worries about the many microcodes included in 126. MFLASH in bios works fine, no issues - just remember to maintain the original uefi rom filename. Here's a link to the folder on my google drive with the extracted CO stepping non-K OC microcode, correct version of mmtool and C0 stepping modded 124 bios: https://drive.google.com/drive/folders/1lci7Womgksah48LfIJ1BGa64d9HKI2W_?usp=sharing Direct link to the patched 124 bios for bclk unlock on C0 stepping cpus only: https://drive.google.com/file/d/17COf-uosnqr57Fzd9g6Zc7R3ve9_4X9G/view?usp=sharing Tested and working, though memory ratio support seems a bit shit. On 126 unmodded I was stabilised but not fully tweaked out at 6933mhz, I can't post using ratios above 6000mhz at 100bclk with the microcode modded 124 bios. As long as the actual headroom is still there the higher ratios are irrelevant now bclk works. I have made a modded 126 but its untested - I won't be risking it unless I cant match memory oc with 126 unmodded on this bios. Thanks @skullbringer EDIT - I flashed 126 I modded myself and bricked my board. I used the exact same modding procedure as I did with the working 124 linked above, so I don't think I screwed up but it still could be a me problem if anyone else has the balls to try (no flashback). 124 bios linked above works fine, but isn't as good as the 126 stock bios for memory clocking - TM5 stability over 6600 was very delicate and not reliable between boots. I probably should've flashed stock 124 first to get a comparison point, too late now.

That's a great tip, thanks. I've had a quick poke with mmtool and figured out how to extract the microcode (well it saved something anyway lol). As is usual when you help someone though, I'm afraid I need to bother you with a couple more questions if you happen to know and are able to answer? First do you know if the mflash embedded in bios will flash a modified file or is there a version in the public domain that will that I need to find? The ITX doesn't have a flashback button so there's no hard flash option. The second question is a bit trickier but you may be able to answer if you helped with the H0 step mod. There's 6 microcode's in the bios for various stepping CPUs (two duplicates for 0670 and 0672 I assume for AVX512 support). Does the listed order matter? I suspect it doesn't normally (or maybe ever) matter, however I wonder if the AVX512 support that was worked in may affect that? No worries if you don't know, I'm just a little hesitant to check myself without a flashback button ? If/when I get this working I'll share here, your help is much appreciated - Thanks!

Picked up my Unify ITX last week - latest bios 126 has no support for non-K OC, at least on a C0 stepping 12400f. @skullbringer @Birilio Apologies for the @ from a random, but have either of you seen any sign of a C0 stepping non-K OC bios for the ITX board?

Any sign of bclk oc for C0 stepping on the Unify ITX? I was hoping something would crop up when the new bios was released, but that came out Friday and my Google-fu has turned up nothing. Maybe not looking in the right place, but couldn't even find much discussion about it at all...quite surprised.