The GPU is definitely being used in Modern Warfare, as it is responsible for rendering the graphics and visuals in the game. The GPU works alongside the CPU to ensure smooth gameplay and high-quality graphics. Without the GPU, the game would not be able to run properly or display the detailed graphics that Modern Warfare is known for. **

The best GPU for you will depend on your specific needs and budget. Some popular options include NVIDIA's GeForce RTX series for high-end gaming and content creation, AMD's Radeon RX series for a more budget-friendly option, and professional-grade GPUs like NVIDIA's Quadro or AMD's Radeon Pro for professional workloads such as 3D rendering or video editing. It's important to consider factors such as performance, price, and compatibility with your existing hardware when choosing a GPU. **

The GPU may not be supported for Modern Warfare if it does not meet the minimum system requirements for the game. This could be due to outdated hardware or incompatible drivers. If Modern Warfare is not starting, it could be due to a variety of reasons such as corrupted game files, conflicting software, or issues with the game's installation. It is recommended to check for updates for both the GPU drivers and the game itself, as well as verifying the game files through the game launcher to troubleshoot the issue. **

In Modern Warfare, a GPU temperature of 80 degrees Celsius is considered to be within the normal operating range for most graphics cards. While it is on the higher side, it is not uncommon for GPUs to reach this temperature during intense gaming sessions. However, it is important to monitor the temperature and ensure that it does not exceed this level for extended periods to prevent overheating and potential damage to the hardware. **

The GPU temperature when playing Modern Warfare 2 can vary depending on the specific graphics card and cooling system in your computer. However, it is generally recommended to keep the GPU temperature below 80 degrees Celsius to ensure optimal performance and longevity. You can monitor the GPU temperature using software such as MSI Afterburner or GPU-Z while playing the game to ensure it stays within a safe range. If you notice the temperature consistently exceeding 80 degrees Celsius, you may need to adjust your graphics settings or improve your computer's cooling system. **

It would depend on the specific use case and budget. For gaming, the NVIDIA GeForce RTX 3080 or AMD Radeon RX 6800 XT are popular choices for high performance. For professional work such as video editing or 3D rendering, the NVIDIA Quadro RTX 5000 or AMD Radeon Pro W6800 would be suitable options. It's important to consider factors such as power consumption, compatibility with other hardware, and the specific requirements of the tasks you'll be using the GPU for. **

The difference between GPU 0 and GPU 1 lies in their physical location within a computer system. GPU 0 is typically the primary or main graphics processing unit, while GPU 1 is the secondary or additional graphics processing unit. In terms of performance, GPU 0 may have higher processing power and memory capacity compared to GPU 1. Additionally, GPU 0 may be responsible for handling the majority of graphics-intensive tasks, while GPU 1 may be utilized for parallel processing or specific workloads. **

The GPU-CPU rendering combination can be slower than just GPU rendering in some cases. This is because the CPU may not be as efficient at handling rendering tasks as the GPU, which is specifically designed for graphics processing. However, in certain scenarios, such as when the CPU is able to handle certain aspects of the rendering process more effectively than the GPU, the combination of both can result in faster overall rendering times. Ultimately, the speed of the GPU-CPU rendering combination will depend on the specific hardware and software being used, as well as the nature of the rendering task. **