Yesterday i received 4 new 140MM case fans for my PC. They are Thermalright X-Silent 140MM. I had 2 Thermaltake 120mm's i was using before but i moved them on the cpu cooler instead so i can have dual fans on the CPU cooler. But getting to the point. After a short while a funny smell started to emit from the case. Almost a oily burning smell. The 140mm fans are rotating properly so iam thinking this is like a startup smell after being run for the first time. i did notice the 120mm that i put onto the cpu cooler didnt spin so i had to move the blade to "kickstart" it. Will this smell pass or should i be more concerned?