Lucky PC Scavenger Finds 12 RTX 3070 GPUs From Old Crypto Mining Rigs

A PC enthusiast has recovered two old cryptocurrency mining rigs containing 12 Zotac GeForce RTX 3070 graphics cards, creating an unusually valuable hardware haul from the previous mining boom.

The rigs had reportedly been sitting unused in a basement for years after cryptocurrency mining became less profitable. Despite their age and storage conditions, the components appear to have survived with relatively little visible damage.

The owner now plans to test every RTX 3070 individually before deciding what to keep and what to sell.

Most of the graphics cards appear salvageable

Photos of the recovered hardware show the RTX 3070 cards in relatively good physical condition considering their previous use.

The main visible issue is minor silicone or oil residue around several cards. This can happen when thermal pads age and begin releasing some of their material over time.

That does not necessarily mean the GPUs are damaged.

A proper restoration would likely involve cleaning the cards with isopropyl alcohol, replacing old thermal pads and applying fresh thermal paste before testing temperatures and stability.

The owner has not yet confirmed how many of the 12 graphics cards still work, so the condition of the full collection remains uncertain.

Mining use does not automatically ruin a GPU

Secondhand mining graphics cards often have a poor reputation, but heavy mining use does not always mean a GPU has been badly damaged.

Mining operators commonly reduce GPU voltage and power consumption to improve efficiency and lower electricity costs. Lower power limits can also reduce operating temperatures and stress on the GPU core.

Other parts can still wear over time, including fans and thermal materials, so each card needs to be checked individually.

Testing should include temperatures, fan behaviour, memory stability, benchmark performance and extended gaming or stress workloads.

RTX 3070 remains useful despite its age

Nvidia launched the RTX 3070 in 2020 as an upper midrange Ampere graphics card.

It includes 5,888 CUDA cores and 8 GB of GDDR6 memory. The card became popular for 1440p gaming and also attracted cryptocurrency miners because of its combination of performance and power efficiency.

Its 8 GB memory capacity is more limiting for some modern workloads than it was when the card launched, but the RTX 3070 can still provide useful gaming performance depending on the title and graphics settings.

Twelve cards also represent 96 GB of graphics memory in total, although that memory cannot simply be combined into a single 96 GB pool for normal gaming.

The owner reportedly intends to keep at least one card if the tests go well and sell around 10 or 11 of the remaining GPUs.

That could turn the abandoned mining hardware into a useful collection of gaming cards rather than leaving the equipment unused in storage.