Processor Configurations
Design Guide 11
2 Processor Configurations
2.1 Processor Configurations – Recommended
The below table shows various processor configurations for 12V2 current
recommendation that should meet the values indicated.
Table 2-1: 12V2 Current for Processor Configurations
PSU 12V2 Capability Recommendations
Processor TDP
Continuous
Current
Peak Current
165 W 37.5 A 40.0 A
125 W 26 A 34 A
65 W 23 A 30 A
35 W 13 A 16.5 A
All future processor power / PSU Current requirements will be defined in a document
titled ATX12VO and ATX12V PSU Design Guide Addendum (# 621484
) that will apply to
both Single Rail and Multi Rail ATX Power Supplies.
The above table is associated with different power level requirements of the 10
th
Generation Intel Core Processor Family Datasheet for 35W, 65W and 125W skus. The
165W sku is associated with Intel® Core™ X-Series Processors.
• Peak Power called ICCMax 10 ms Max (PL4) for -S Processors
• Continuous Power called PL2 Level for -S Processors
Reference Equation for 12V2 Capability Calculation:
12V2 Peak Current = (SOC Peak Power / VR efficiency) / 11.4V
12V2 Continous Current = (SOC PL2 power / VR efficiency) / 11.4V
NOTES:
1. PSU rail voltage is 11.4V, 12V2 should be able to supply peak current for 10
ms.
2. Motherboard VR efficiency is 85% at TDC and 80% at SOC peak power (AKA
IccMax).
3. Motherboard plane resistance is 1.1 mohm.
4. If the power supply supports the 240VA Energy Hazard protection requirement
then Current levels for the 12 Volt rail above 20 Amps would have to be split
into multiple 12V rails.
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