With the launch of Ethereum 2.0’s Beacon Chain, many users have questioned whether traditional Proof-of-Work (PoW) mining is still viable. While the long-term future of PoW mining remains uncertain, a more immediate challenge has already hit miners: 4GB GPU mining rigs can no longer mine Ethereum.
Unlike Bitcoin, which relies on computational power, Ethereum 1.0 used the Ethash algorithm—a memory-intensive protocol that generates a DAG (Directed Acyclic Graph) file stored directly in the GPU's VRAM. As the DAG grows over time, it demands more memory. When the DAG exceeds a GPU’s available memory, mining becomes impossible.
On December 25, 2020, at block height 11,520,000, Ethereum’s DAG file surpassed the 4GB threshold. This milestone rendered millions of 4GB GPUs—once widely used in Ethereum mining—obsolete for ETH mining overnight.
It's estimated that between 1.53 million and 3 million 4GB GPU rigs were actively mining Ethereum, contributing up to 40% of the network’s total hash rate. But now, miners face a critical decision: What should they do with their outdated hardware?
Three Practical Solutions for 4GB GPU Miners
1. Switch to Linux to Extend Mining Life
One of the simplest ways to squeeze extra life from a 4GB GPU is switching from Windows to Linux.
Here’s why:
Windows reserves approximately 600 MB of VRAM for system processes and virtual memory, leaving only about 3.4 GB usable for mining. In contrast, Linux uses far less—around 120 MB—freeing up closer to 3.88 GB for DAG storage.
👉 Discover how switching systems can boost your mining efficiency today.
This small change can extend the usable life of a 4GB GPU by up to three months, depending on DAG growth rates. While it won’t solve the problem permanently, it offers a low-cost, immediate fix for miners unwilling to invest in hardware upgrades.
2. Upgrade GPU Memory (Hardware Modification)
If software tweaks aren’t enough, some miners opt for a hardware upgrade: increasing VRAM capacity.
Most 4GB GPUs use eight 512MB GDDR5 chips. To upgrade to 8GB, technicians replace them with eight 256MB x32bit GDDR5 memory chips, effectively doubling memory bandwidth. The cost of components alone is around $60 USD per card, not including labor.
While technically feasible, this method comes with risks:
- Potential damage during soldering
- Reduced stability or performance
- Voided warranties (if applicable)
Nonetheless, several mining pools and third-party services now offer professional GPU remodding, making this option more accessible than ever.
Note: This modification works best on certain AMD models like the RX 570/580 and requires skilled technicians.
3. Mine Alternative Cryptocurrencies
The most practical and scalable solution is switching to altcoins compatible with 4GB GPUs. Several blockchain networks have adjusted their algorithms or maintained smaller DAG sizes specifically to support older hardware.
Let’s explore the top options:
BEAM – Privacy-Focused Mining with BeamHash III
BEAM is a privacy-centric cryptocurrency built on the Mimblewimble protocol. It uses the BeamHash III hashing algorithm, which does not rely on DAG files, making it ideal for low-memory GPUs.
Advantages:
- No DAG size limitations
- Strong privacy features
- Active development community
Drawbacks:
- Lower market liquidity compared to major coins
- Volatile price movements
Despite lower trading volume, BEAM currently offers one of the highest net profit margins for 4GB miners using cards like the RX 580.
ETC (Ethereum Classic) – Revived by Thanos Hard Fork
In January 2025, Ethereum Classic executed the Thanos hard fork (ECIP-1099)—a pivotal upgrade designed to reduce DAG size and restore mining viability for GPUs with as little as 3GB VRAM.
This modified version of Ethash, known as EtcHash, allows 4GB GPUs to mine ETC again efficiently.
Benefits:
- Backward compatibility with older hardware
- Established network with strong decentralization
- Improved security post-fork
ETC stands out as a sustainable long-term option due to its commitment to maintaining ASIC resistance and supporting GPU miners.
RVN (Ravencoin) – High Performance, High Power Draw
Ravencoin uses the KawPoW algorithm, a variant of ProgPoW designed to be ASIC-resistant and GPU-friendly. While KawPoW is memory-intensive, it remains functional on 4GB GPUs.
Pros:
- Actively developed with regular updates
- Focused on asset issuance and peer-to-peer transfers
- Decentralized mining pool ecosystem
Cons:
- Higher power consumption
- Requires optimized settings for stability
RVN delivers solid returns and ranks among the most profitable options for existing 4GB rigs.
ZIL (Zilliqa) – Low DAG Growth, Modest Returns
Zilliqa uses the same Ethash algorithm as Ethereum but with a much slower DAG growth rate. As of now, ZIL’s DAG size is only 1.24 GB, not expected to reach 4GB until 2032.
Advantages:
- Extremely safe for current hardware
- Long-term mining potential
- Scalable smart contract platform
Limitations:
- Low profitability compared to other coins
- Smaller market cap and trading volume
While ZIL is technically ideal for older GPUs, its financial return doesn’t match that of BEAM or RVN.
Which Coin Should You Mine?
To determine the best option, consider these key factors:
| Factor | BEAM | ETC | RVN | ZIL |
|---|---|---|---|---|
| Algorithm | BeamHash III | EtcHash | KawPoW | Ethash |
| DAG Size Dependency | None | ~3.5 GB | ~4 GB | ~1.24 GB |
| Profitability (RX 580) | High | Medium-High | High | Low |
| Market Liquidity | Low | High | Medium | Low |
Based on current data, RVN (Ravencoin) emerges as the optimal choice for most 4GB GPU miners due to its balance of profitability, network health, and hardware compatibility.
However, those prioritizing longevity might prefer ETC, especially after the Thanos upgrade restored mining accessibility.
👉 Compare real-time mining profits across different coins and find your best fit.
Frequently Asked Questions (FAQ)
Q: Can I still mine Ethereum with a 4GB GPU?
No. Since December 2020, Ethereum’s DAG file has exceeded 4GB, making it impossible for GPUs with only 4GB VRAM to mine ETH effectively—even under Linux.
Q: Is upgrading GPU memory worth it?
It depends. If you own multiple rigs and plan to mine long-term, remodding may be cost-effective. However, for casual miners, switching coins is usually cheaper and safer.
Q: Which coin offers the best return on investment?
Currently, RVN and BEAM offer the highest ROI for AMD RX 580 4GB miners. However, always check real-time calculators due to fluctuating prices and difficulty levels.
Q: Will any new coins support 4GB GPUs in the future?
Yes. Many projects prioritize decentralization and actively design algorithms to remain accessible to consumer-grade GPUs. Keep an eye on emerging privacy and asset-tracking blockchains.
Q: Can I use these GPUs for non-mining purposes?
Absolutely. Older GPUs are still useful for:
- Home media centers
- Light gaming
- AI inference tasks (with optimization)
- Distributed computing (e.g., Folding@home)
Repurposing hardware extends its lifecycle beyond crypto mining.
Core Keywords
- Ethereum mining after DAG increase
- 4GB GPU mining alternatives
- Ethash algorithm requirements
- Best altcoins for old GPUs
- Ethereum Classic Thanos fork
- Ravencoin KawPoW mining
- GPU remodding guide
- Post-Ethereum PoW mining options
Mining isn’t dead—it’s evolving. With strategic adjustments, millions of “obsolete” 4GB GPUs can continue generating value through alternative networks and innovative use cases.
Whether you choose to upgrade, switch, or repurpose, opportunities remain abundant in the decentralized economy.
👉 Start exploring profitable mining alternatives and maximize your hardware's potential now.