What motherboard would you recommend for a 12 gpu rig?

I have a Biostar TB360-BTC PRO 2.0 MB that has been a giant pile of dog dodo for me. Its latest issues are the BIOS not holding time and being generally very finicky, takes 5-10 reboots before it recognizes all the GPUS, fan speeds and starts chugging along. I have tried 100’s of different bios setting changes and feel like I’ve ruled most everything else out. It is being RMA’d but I feel like its time to make a change anyway. I run it on (2) 240v HP Server PSU’s with Parallel Miner pico power boards. Its reluctantly running 3) 3090’s, 1) 3080, 1) 3070, all non-LHR’s. I’m on HiveOS with NB Miner. I’d like to reuse the same CPU and Ram. Crucial BL8G32C16U4B Ballistix 3200 MHz DDR4; Intel BX80684G5420 Pentium Gold G5420 2 Core 3.8 GHz LGA1151 300 Series 54W.

Now having said all that, I’m hoping for a recommendation on a new motherboard that is also hopefully somewhat available and works with these specs. Long term would like to get to 12 GPUs. Thanks for your consideration.

I have 12 GPUs on a ASRock B450 Gaming K4 with a Ryzen 2700X.
It only has 6 slots, so I had to buy two 1 to 4 pcie splitters.

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the asrock h110 pro btc or asus b250 mining expert are pretty problem free in my experience with 12 cards.

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