Don't count out old tech, CoreWeave CEO Michael Intrator tells CNBC in an interview. The combination of Nvidia's chips and CUDA platform with CoreWeave's cloud and software means even old infrastructure can have an extended life at a premium price point, Intrator says, adding that a "vintage" 2020 architecture has been contracted through 2029. "Older generations of GPUs are going to have a longer useful life than anyone anticipated. They are going to contract for a longer term, and they are going to contract at a higher price," Intrator says. "We already are seeing that flow through our platform." The robust compute demand validates the company's business model, Intrator says. Shares are up 19%.