My i5 4200U SP2 is 12-15% slower than a friends i5 4300U in video rendering image manipulation and 3d rendering. The difference is noticeable in gaming as well. In wow with same settings I get 50 fps he gets 63fps. That is
substantial in my book.
Ok, that's interesting then since my testing shows that the CPU+GPU of the 4300U will get throttled once it reaches 80 degrees Celsius which will prevent it from maintaining its maximal clock speed. If you are seeing a real difference between the 4200U and
4300U SP2 versions, this means that the 4200U is throttling to a lower clock speed than the 4300U.
Do you think you guys could run the stress tests that I mention above using HeavyLoad with your Task Manager open to see what clock speed the two models end up at after roughly 5 min? If you want to track temperature, I also recommend that you have Core
Temp open as well.