I have an HD 7950 and two days ago I installed Afterburner to check if could overclock a little my card. The default core frequency is 925Mhz and the memory frequency is 1250Mhz. BEFORE overclocking i decided to check my actual temperatures using the RivaTuner integrated in Afterburner. Now here is my problem. I noticed that when my GPU usage goes to 100% the GPU core frequency jump down from 925Mhz to 800Mhz then when the GPU usage decrease for example to 50%-60% the GPU core frequency increase again and goes back to 925Mhz. Is that normal ?