Trim the fat from the steaks and place on a baking sheet.
In a small bowl combine salt, garlic powder, cumin, pepper, and cayenne pepper. Sprinkle over steaks and rub into steak.
Cover with plastic wrap and let marinate in fridge for 1 hour.
While steaks are marinating, make the chimichurri by combining all ingredients, except olive oil in food processor.
Process while streaming in olive oil. Continue to process until smooth and creamy stopping to scrape down sides of bowl as necessary. Transfer to airtight container until ready to use.
Once steaks are done marinating, remove from fridge and preheat grill to medium. Grill steaks for 5-7 minutes per side, turning once, or until desired doneness is reached.
Remove from grill and let sit for 10 minutes before slicing.