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I got my 2nd batch of z9 mini today. None of the 4 miner from this batch can hold 700 mhz clock, they can do 650mhz at 14.1k sol/s. Still fine tuning them for max hash rate.

2 miner from the first batch easily does 750mhz, 16k sol/s.

They are probably sorting chips for mini vs full size z9. That is common for other chip makers and helps explain variation in batch one hashrate. Unfortunate for batch two buyers on all fronts, it seems.

The Mini and full have same chips, it appears, and same rated MHz/performance. So not much need to sort the chips for either.

Not all chips in a batch are created equally. They pick the best ones for higher end products like the non mini which require a higher stock clock speed. This is called silicon binning.

Only that the manual of the non mini says its also clocked at 500.

Interesting. Does this mean the non mini has 4-5x the amount of hashboards then? Based on how well the batch 1 minis OC I would think the non mini should be able to hit 50k with just 2-3x the hashboards.

It has 4 times the hashboards. That makes me think it can be at least overclocked to hash at 60.

There might be another limitation, which is the number of 6pin PCI-E power connectors per board, Z9 Mini has one 6pin connector to power 4 chips, Z9 has 2 x 6pin power connectors per board to power 16 chips. Each connector is rated at 150 Watt max, so 6 connectors x 150 = 900W. So those power connectors are at MAX rated power out of the box. 60k will require at least 50 more power, which is 1350Watt best case scenario, if not more.