Are there any cooling limitations or thermal bottlenecks with immersion cooling for intensive workloads? 

No. Immersion cooling eliminates thermal bottlenecks by providing full-system heat dissipation. High TDP chips such as GPUs are efficiently cooled, while 100% of other components – memory modules, VRMs, NICs – benefit from uniform and consistent thermal management. Single-phase immersion cooling ensures complete temperature stability across the entire system, preventing thermal stress and maximizing performance.