Ethereum Mining GPU Out of Memory

Understanding GPU Memory Requirements for Ethereum Mining

Ethereum uses the Ethash proof-of-work algorithm, which requires the DAG (Directed Acyclic Graph) to be loaded entirely into the GPU memory. The DAG file grows over time as the chain progresses. In 2021 the DAG size passed 4 GB, making 4 GB GPUs unable to mine Ethereum directly. When the DAG exceeds available VRAM, the miner crashes with an out of memory error. Understanding this limitation is the first step to finding a solution.

Common Causes of Out of Memory Errors

• DAG size larger than GPU VRAM capacity
• Background applications (browsers, games, streaming) consuming VRAM
• Mining software configured with too many threads or large cache settings
• Unstable memory overclocks causing allocation failures
• Driver issues or incorrect virtual memory settings

Solutions to Try

1. Increase System Virtual Memory

On Windows, set a custom paging file size of at least 16 GB (initial and maximum) to prevent system-level memory bottlenecks. This helps when the miner uses system RAM as a fallback.

2. Use Mining Software with Low‑Memory Mode

Several miners offer a low‑memory or zombie mode that reduces VRAM usage. For example, T‑Rex Miner supports the --low-memory flag, lolMiner provides a --keepfree parameter, and TeamRedMiner includes a --vrram option. These modes allow GPUs with 4 GB or 5 GB to continue mining by offloading part of the DAG to system memory.

3. Close Unnecessary Applications

Browsers, video players, and games reserve VRAM. Close them before starting the miner to free up memory.

4. Lower Memory Overclocks

Aggressive memory overclocking can cause instability and out‑of‑memory errors. Reduce or reset the memory clock to stock speeds and test stability.

5. Consider a GPU with More VRAM

If your GPU has 4 GB or less and you want to mine Ethereum without workarounds, upgrade to a model with 6 GB or 8 GB VRAM (e.g., RTX 2060 6GB, RTX 3060 Ti, RX 6700 XT).

Frequently Asked Questions

Can I mine Ethereum with a 4 GB GPU in 2022?
After the DAG exceeded 4 GB, 4 GB cards can no longer mine Ethereum using the full DAG. However, some mining software provides a zombie mode that allows 4 GB GPUs to mine Ethereum with reduced performance. Alternatively, you can switch to mining other coins (e.g., Ethereum Classic, Ravencoin).

What is the minimum VRAM for Ethereum mining?
As of 2022, you need at least 5 GB VRAM for Ethereum; 6 GB is recommended for stable operation.

Does virtual memory help with GPU out of memory?
Virtual memory (page file) helps with system RAM shortages but cannot replace dedicated GPU VRAM. It may reduce miner crashes related to system memory allocation but will not solve a VRAM‑only DAG overflow.