My new laptop has has an Intel i7-720QM processor which has a base frequency is 1.6Ghz with a Turbo Boost potential of 2.8Ghz. While I'm playing back video in the Premiere CS5 timeline, I see the turbo boost kick in (via the Intel Turbo meter Gadget) to nearly 2.8Ghz. However, while rendering using the Adobe Media Encoder, the turbo boost just sits on 1.6Ghz with an occasional bump to 1.7Ghz. I thought maybe it was because the Turbo Boost frequency is partially dependent on the amount of cores being used, since the Adobe Media Encoder uses all of them. But, I ran the Windows Experience Index and watched as it used all cores and was Turbo Boosting to 2.7Ghz. I'm just wondering if it is normal for the Adobe Media Encoder not to use the Turbo Boost feature, or if its just something in my system.
Asus N82J laptop, i7-720qm, 4GB ram, nVidia GeForce 335m 1GB, Windows 7 64bit
Per your post, when using adobe media encoder (AME), you do observe all cores being utilized (4 cores, 8 threads), correct? That likely means that the CPU is running at full utilization, and at its highest operating temperature. Turbo boost works when it typically there is enough temperature or tdp headroom to run at the higher clock (1.6Ghz to 2.8Ghz), so the scenario is usually met when only one or two cores are used. Since all 4 cores are used, then it must run at its normal running speed, 1.6Ghz, as turbo boost would exceed its allowable temperature.
Also, have you tried running the MPE or mercury playback engine hack with your mobile gpu, the Geforce GTS 335M?
Yes, I've applied the hack. The only test I've run with the hack was an export to mpg and it actually took a few seconds longer than without the hack.