Update README.md

README.md

@@ -43,7 +43,7 @@ If you use ORB-SLAM2 in an academic work, please cite:
      }
 
 #2. Prerequisites
-We have tested the library in Ubuntu 12.04 and 14.04, but it should be easy to compile in other platforms.
+We have tested the library in **Ubuntu 12.04** and **14.04**, but it should be easy to compile in other platforms. A powerful computer (e.g i7) will ensure real-time performance and provide more stable and accurate results.
 
 ## C++11 or C++0x Compiler
 We use the new thread and chrono functionalities of C++11.