Yes, indeed Cooler Master is a reputable manufacture, but you'll need to search further to find the Thermal Design Power (TDP) Specification.
Take a look at this page
Thermal Design Power (TDP) & CPU Socket Compatibility List - Cooler Master
or the pdf provided on that page
Figure 1. List of Cooler Master Products TDP
It says that Cooler Master i70 TDP = 95W. Since you're not using it as a CPU cooler which the manufacturer intended you to do. There'll probably TDP margin error with your specific peltier module. Also, you would need to actually experiment with it, since the cooling performance depends on ambient temperature, airflow, et cetera.