The 2025 GPU Renaissance: From Gaming to AI Labs and ... - Unihost

However, this renaissance has brought with it a new, harsh reality. Modern graphics accelerators – whether they are the monstrous NVIDIA H100/B200 or consumer flagships like the RTX 4090/5090 – have ceased to be devices that can simply be “plugged into a computer.” Their power consumption, heat dissipation, and data bandwidth requirements have grown so much that physical ownership of the card has become a problem, not a solution. … **Problem #1: Heat Stroke and Throttling** We have already written about Heatwaves, but in the context of GPUs, the problem is more acute. Modern cards have a “Flow Through” design or a blower type. If you place two RTX 4090 cards next to each other in a standard case, the top card will suffocate from the heat of the bottom one within 10 minutes. - VRAM memory temperature instantly flies past 100°C. - The card drops frequencies (throttles). - Instead of training a model, you get an expensive space heater. Stable operation requires chassis with airflow from industrial fans running at 6000+ RPM, which are impossible to use next to people due to noise levels of 80 dB. … Moreover, modern GPUs create **Transient Load Spikes**. A card can consume 2x its nominal power for a millisecond. Ordinary power supply units go into protection mode (shutdown). Server PDUs and power supplies in Unihost data centers are designed to “swallow” such spikes. **Problem #3: PCIe Bandwidth**