Specifying vCPUs and Memory with Skypilot

I am trying to launch few instances with skypilot and looks like the same GPU instance (I am trying RTX 4090) gets assigned different number of vCPU and memory. Due to this, I am getting memory errors while loading the data. Is there a way to request for specific number of vCPUs from skypilot ? (I can specify something like cpus: "8+", but I cannot specify a higher number like 12+ for RTX 4090)