To enable the fps limiter, right-click the Show Overclocking button and select Driver Profile Settings.. From here, find the Frame Rate Limiter listing under the Common subheading and choose an fps limit from the dropdown box. You may need to play around with the limit depending on the games being played and your monitor's refresh rate if you experience any screen tearing or other visual oddities.
Details. Though there is no cost to get into El Yunque National Forest (for hiking, etc.), there is a small entrance fee for El Portal Rain Forest Center. They charge $4/adult and $2/senior. Kids under 16 are free. They collect the entrance fee upon entry to the parking lot. Your National Park Service passes are valid here.
The ruins are about 6 km from the town of Palenque and minibuses run between the town and ruins every 10 to 15 minutes during the day (20 pesos, december 2013). Combis-shared taxis-are also available. Just wait at the park gate at El Panchan. A colectivo will pick you up.