Photographing Hash Board Revisions Before You Buy Used ASICs

Brokers often list “S19j Pro” without stating hash board revision. Two boards in the same chassis can carry different part numbers, different fan shroud mounts, and incompatible spare stock. We see rejected deals weekly because photos showed only the outer case.

What to Photograph

1. Silkscreen revision near the PCIe-style connector—use angled light; labels fade.
2. Serial sticker on the aluminum plate, not the plastic shroud sellers swap.
3. Fan part number on the hub sticker; shrouds get mixed in refurbishment shops.
4. PSU label with model and output table—some batches ship with down-rated units.
5. Firmware screen showing active chain count and per-board error rate at temperature.

Red Flags in Photo Sets

• Only frontal case shots with dust filters installed
• Blurred serial numbers “for security”
• Mixed fan brands in one rig photo
• Pool screenshots without temperature overlay

How We Use Your Photos

When you book a spare parts trace before purchase, these images cut verification time by half. We match visible revisions to distributor rows in our index and flag mismatches before you wire deposits.

For large lots, schedule a depot assessment—photos help, but hands-on torque checks reveal cracked hash board mounts photos miss.