> ## Documentation Index
> Fetch the complete documentation index at: https://docs.phala.com/llms.txt
> Use this file to discover all available pages before exploring further.

> How to Register Your GPU Worker On-Chain and Start Earning Rewards:

# Register Your GPU Worker On-Chain and Start Earning Rewards

After successfully deploying Dstack, enabling TDX + GPU stack support, your GPU worker is technically online — but **not yet registered on-chain**.\
To actually start earning GPU mining rewards, each GPU must:

1. Pass environment verification
2. Receive an official **GPU NFT**
3. Create a **stakepool**
4. Lock the GPU NFT into the stakepool
5. Deposit required **vPHA collateral**
6. Activate mining

This guide walks you through each step.

## 1. Manual Environment Verification (Required Before On-Chain Registration)

Because the automated GPU verification pipeline is still under development, GPU miners must currently undergo **manual verification**.

After your machine:

* appears online in Phala Cloud
* shows healthy TDX + GPU stack operation
* completes all configuration steps

Please contact the Phala Delegation Team: [delegation@phala.network](mailto:delegation@phala.network)

Include the following:

* Your GPU hardware model (H100 / H200 / B200)
* Your wallet address (for receiving the NFT)
* Any logs or additional information if requested

The Phala team will manually verify:

* TDX environment readiness
* GPU compatibility and stability
* Proper Dstack configuration
* Worker reliability

Once approved, you may proceed to on-chain registration.

## 2. Receive Your GPU NFT

After the manual verification is completed, the Phala team will help mint a **GPU Worker NFT** for your device.

This NFT:

* Represents your GPU on-chain
* Stores metadata such as GPU model & reward weight
* Is mandatory for earning mining rewards
* Must be locked into your stakepool

Without the NFT, your GPU **cannot** receive vPHA mining rewards, even if it is online.

## 3. Create Your StakePool

A **stakepool** is a container that:

* Holds your GPU NFTs
* Stores your required vPHA collateral
* Tracks your mining activity and earnings
* Acts as your mining identity on-chain

Each miner typically only needs **one stakepool**, unless managing GPUs under different ownership structures.

Using your wallet interface (e.g., MetaMask):

1. Click **Create StakePool**
2. Sign the transaction
3. Wait for on-chain confirmation

Your stakepool is now ready.

## 4. Lock Your GPU NFT Into the StakePool

Once your stakepool is created:

1. Open the stakepool interface
2. Choose **“Lock NFT”**
3. Select the GPU Worker NFT you just received
4. Confirm the transaction

Your GPU is now officially registered on-chain.

## 5. Deposit Required vPHA Collateral

Each GPU requires a certain amount of **vPHA collateral** to ensure network security.

| GPU Model  | Required vPHA |
| ---------- | ------------- |
| **H100**   | 1250 vPHA     |
| **H100x8** | 10000 vPHA    |
| **H200**   | 1875 vPHA     |
| **H200x8** | 15000 vPHA    |
| **B200**   | 2250 vPHA     |
| **B200x8** | 18000 vPHA    |

To deposit collateral:

1. Convert PHA → vPHA through the staking contract if needed
2. Bridge the vPHA to L2 network via "bridge.phala.network"
3. Open your stakepool
4. Choose **Deposit Collateral**
5. Deposit the required amount (based on GPU type)

This collateral:

* Does **not** earn rewards
* Is used purely as a **security guarantee**
* Is fully withdrawable when you retire your GPU and exit properly

## 6. Start Mining and Earn vPHA Rewards

After completing:

* NFT lock
* vPHA collateral deposit
* Worker online status in Phala Cloud

Your GPU will automatically start the mining process.

### Reward Distribution Details

* Rewards are paid in **vPHA**
* Rewards are calculated hourly and **Payout happens every hour** at the **end of each hour**

### Reward Weights by GPU Type

| GPU Model | Weight |
| --------- | ------ |
| H100      | 1.0    |
| H200      | 1.5    |
| B200      | 1.8    |

You can monitor these metrics on app.phala.network

* Worker status
* On-chain status (stakepool interface)
* Earnings flow (vPHA rewards updated hourly)