Intel's new Alder Lake CPU family will largely take over the TDP conditions of the current generation in the notebook. The peak is now 115 watts, but this applies to 6 + 8 cores and GT2 graphics unit. Tiger Lake-H45 needs 107 watts at its peak for eight cores and UHD graphics.
According to the entries, the Alder Lake CPUs are now in a bug-adjusted and optimized B0 -Stepping ahead so that the fine-tuning of the clock and the TDP can begin. There are several gradations, which is due to the new design of Alder Lake. Depending on the number of small and large cores, TDP is also required and released. Because, as a roadmap showed a few weeks ago, the classification takes place within this framework.
The TDP is only as usual a value intended for a very specific scenario. As a rule, this is the basic clock rate at Intel. In everyday life, power limits apply, which can be much larger, since the CPU can operate with many turbo levels. In Coreboot, Intel has stored the first parameters, how it looks with Alder Lake-P in the notebook.
The first two levels are closely followed by Tiger Lake-U, for example a Core i-11000 in the 28-watt TDP configuration can still consume up to 64 watts in turbo today . This also applies in the future to the 4 + 8 + 2 configuration of Alder Lake, i.e. four large cores, eight small atom cores and the GT2 graphics.
The highest level goes further, however, for 45 watt TDP the scope for the 6 + 8 + 2 variant is extended to up to 115 watts. Tiger Lake-H45, currently the highest expansion stage, has up to 107 watts available.
register & quot; power_limits_config [ADL_P_POWER_LIMITS_282_CORE] & quot; = & quot; {.tdp_pl1_override = 15, .tdp_pl2_override = 55,} & quot; register & quot; power_limits_config [ADL_P_POWER_LIMITS_482_CORE] & quot; = & quot; {.tdp_pl1_override = 28, .tdp_pl2_override = 64,} & quot; register & quot; power_limits_config [ADL_P_POWER_LIMITS_682_CORE] & quot; = & quot; {.tdp_pl1_override = 45, .tdp_pl2_override = 115,} & quot;
115 watts sound like the last known Intel crowbar at first glance, but this has become the new rule in notebooks – and AMD is also pulling along here. Depending on the notebook, the Cezanne APUs are specified with up to 130 watts as the maximum power limit. It therefore seems to be the new rule instead of just an exception.
Intel's Alder Lake family is set to celebrate its debut on the desktop in the second half of this year in addition to the notebook.
Update 6/16/2021 11:52 am
Further interesting details come from the constantly expanding changelogs. Accordingly, a PL1 of 20 instead of the previous 15 watts is now planned for the combination 2 + 8 + 2, i.e. with two large cores, eight small cores and GT2 graphics. The 15 watt option should still remain for even smaller variants that were shown on the roadmap shown.
soc/intel/alderlake: update pl1 to 20W Update PL1 value from 15W to 20W for 282 SKU.