RAM bottlenecks surface with RTX PRO 6000 Blackwell

The RTX 6000 Blackwell is a category-defining workstation card, but its 1.8 TB/s internal bandwidth makes standard dual-channel DDR4 a major liability.

• –96GB VRAM is a massive sweet spot, allowing most 70B+ models to run entirely on-device without hitting system RAM.
• –For models exceeding 96GB (like Llama 3 405B), DDR4 systems will see tokens-per-second drop to near-zero during memory offloading.
• –Transitioning to 8-channel DDR5 platforms (Threadripper/Xeon) is now essential to match the GPU's throughput for multi-agent or out-of-core workflows.
• –PCIe 5.0 support is crucial here, as it doubles the "pipe" capacity for loading weights and managing the KV cache.
• –For AI researchers, the platform upgrade is no longer optional; a high-tier GPU idling on a slow bus is a wasted investment.