# Connect multiple GPUs to a single system for parallel tasks.

To connect multiple GPUs to a single system for parallel tasks, such as machine learning, rendering, or cryptocurrency mining, you need a **motherboard** with sufficient **PCIe slots** and power delivery capabilities. Here's how you can set up your GPUs without needing four separate motherboards:

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### **1\. Recommended Motherboard**

Look for motherboards with multiple PCIe slots and support for multi-GPU setups:

#### **High-End Motherboard Options:**

1. **ASUS ROG STRIX Z790-E GAMING**
    
    * **PCIe Slots**: 4 x PCIe x16 (for GPUs, supports different lane configurations).
        
    * **Compatibility**: Supports NVIDIA 1050, 1060, 4060, and 4090.
        
    * **Price**: ~$350–$400.
        
    * **Key Features**:
        
        * Support for mixed GPU configurations.
            
        * High power delivery for demanding GPUs like the 4090.
            
2. **MSI MPG Z790 CARBON WIFI**
    
    * **PCIe Slots**: 3–4 PCIe x16 slots.
        
    * **Compatibility**: Works well with mixed GPUs.
        
    * **Price**: ~$350.
        
    * **Key Features**:
        
        * Ample spacing for large GPUs like the 4090.
            
        * Excellent cooling support.
            
3. **ASUS Pro WS WRX80E-SAGE SE WIFI (Workstation-Grade)**
    
    * **PCIe Slots**: 7 x PCIe 4.0 x16 slots.
        
    * **Price**: ~$1,000.
        
    * **Key Features**:
        
        * Enterprise-level motherboard for maximum GPU expandability.
            
        * Ideal for connecting all 4 GPUs in your list.
            

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### **2\. Use a PCIe Riser or Mining Rig Frame**

If your motherboard doesn't have enough PCIe slots, you can use **PCIe risers** or a **mining rig frame**:

#### **PCIe Riser Solution:**

* **What It Does**: Allows you to connect GPUs to the motherboard using USB 3.0 or flexible riser cables.
    
* **How to Use**:
    
    * Install the risers into the PCIe slots on the motherboard.
        
    * Connect the GPUs to the risers and provide power using a dedicated PSU.
        
* **Example Product**: **VER 009S PCIe Riser Kit** (~$50 for a set of 6 risers).
    

#### **Mining Rig Frame:**

* **What It Does**: Provides a physical structure to house multiple GPUs with risers.
    
* **How to Use**:
    
    * Combine a mining rig frame with risers to hold and connect all GPUs.
        
    * Ensure adequate cooling and airflow.
        

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### **3\. Power Supply Requirements**

Your setup will need a **high-wattage PSU** or multiple PSUs to power the GPUs:

#### **Single PSU (High-Wattage):**

* **Example**: EVGA SuperNOVA 1600W T2 (~$400).
    
* **What It Does**: Powers all GPUs and the motherboard.
    

#### **Dual PSU Adapter:**

* If you use multiple PSUs, an **add2PSU adapter** can synchronize them.
    

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### **4\. Software and Configuration**

Once the hardware is set up, configure the GPUs for parallel use:

#### **Operating System:**

* Use a multi-GPU-compatible OS like Windows 10/11 or Ubuntu 22.04.
    

#### **Software Frameworks:**

* **CUDA (NVIDIA)** for parallel computing.
    
* **PyTorch** or **TensorFlow** for machine learning.
    
* **Blender** for rendering.
    

#### **GPU Assignment:**

* Assign specific tasks to each GPU using the software's GPU management settings.
    

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### Example Configuration:

1. **Hardware:**
    
    * Motherboard: ASUS ROG STRIX Z790-E.
        
    * PCIe Risers: VER 009S PCIe Riser Kit.
        
    * GPUs: NVIDIA 1050, 1060, 4060, 4090.
        
    * PSU: EVGA SuperNOVA 1600W T2.
        
2. **Software:**
    
    * CUDA for compute tasks.
        
    * Set up rendering software (e.g., Blender) to use all GPUs in parallel.
        

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This setup allows you to connect and use all four GPUs on a single motherboard effectively.