These cards were used to mine Ethereum for ~3 years. These are the dirtiest cards I have. I have taken them apart and cleaned them with Isopropyl Alcohol (70/30) and replaced thermal compound for the GPU core. Thermal pads for memory and power HAVE NOT BEEN REPLACED. It is advised by the manufacturer that unless you see an issue in memory/power throttling to NOT replace the thermal pads.

Before thermal compound replaced on GPU core, cards was power throttling. After new Thermal compound on the GPU core, the cards work without power throttling and are well under max temp.

Furmark at 8 hrs 1080P found NO artifacts. Vul_Mem at 8 passes found ZERO memory defects (All tests Passed)

Get Amplified with the ZOTAC GAMING GeForce RTX™ 30 Series based on the NVIDIA Ampere architecture. Built with enhanced RT Cores and Tensor Cores, new streaming multiprocessors, and high-speed GDDR6 memory, the ZOTAC GAMING GeForce RTX 3070 Twin Edge OC gives rise to amplified gaming with high fidelity.

Features:

• 2nd Gen Ray Tracing Cores
• 3rd Gen Tensor Cores
• White LED Lighting
• IceStorm 2.0 Advanced Cooling
• Active Fan Control with FREEZE Fan Stop
• Metal Wraparound Backplate
• VR Ready