Yupp, dont worry the RAM hardly draws any power, so does the motherboard.
CPU has a TDP at 65 watts, so peak should be around 110 - 120 watts MAX peak wattage at stock settings
Overall you will if you put your system under 100% load on everything be around 300 - 350 watts. But that is with everything running at max. cpu, ram, gpu, hdd, ssd, fans, etc etc.
So yes. You are safe