| ENERGY STAR Partner |
| Lenovo Group Limited |
Lenovo Group Limited |
| Product Category |
| Computers |
Computers |
| Type |
| Notebook |
Notebook |
| Brand Name |
| Lenovo |
Lenovo |
| Model Name |
| Lenovo Yoga C940-15IRH |
ThinkPad X1 Carbon Gen 12 |
| Model Number |
| 81TE |
21KC |
| Date Available On Market |
| September 6, 2019 |
March 12, 2024 |
| Date Certified |
| April 13, 2020 |
March 12, 2024 |
| Markets |
| United States, Switzerland, Taiwan, Japan, Canada |
United States, Switzerland, Taiwan, Japan, Canada |
| CB Model Identifier |
| ES_1037540_81TE_04142020092458_7818727 |
ES_1037540_21KC_03122024141926_3940732 |
| Meets ENERGY STAR Most Efficient 2024 Criteria |
| No |
No |
| Fuel Type |
| Notebook |
Notebook |
| Touch Screen |
| Yes |
Yes |
| Notebooks, Desktops, Integrated Computers, Slate/Tablets, Two-in-one Notebooks, and Portable All-in-ones Category for TEC (Typical Energy Consumption) Criteria |
| 2 |
2 |
| Category 2: Processor Brand |
| Intel |
Intel |
| Category 2: Processor Name |
| Core i9-9980H |
Core Ultra 7 165U |
| Category 2: Operating System Name |
| Windows 10 |
Windows 11 Pro |
| Category 2: Base Processor Speed Per Core (GHz) |
| 2 |
1.7 |
| Category 2: Physical CPU Cores (count) |
| 8 |
12 |
| Category 2: System Memory (GB) |
| 16 |
64 |
| Category 2: Default Low-power Mode |
| Sleep Mode |
N/A |
| Category 2: Long Idle Power Used for Sleep Mode |
| No |
No |
| Category 2: Off Mode (watts) |
| 0 |
0.2 |
| Category 2: Sleep Mode (watts) |
| 2 |
0.6 |
| Category 2: Long Idle (watts) |
| 2 |
0.6 |
| Category 2: Short Idle (watts) |
| 8 |
8.7 |
| Category 2: Base TEC Allowance (kWh) |
| 14 |
14 |
| Category 2: Functional Adder Allowances (kWh) |
| 24 |
29.9 |
| Category 2: TEC of Model (kWh) |
| 31 |
25.8 |
| Ethernet Capability |
| No |
No |
| Sleep Mode Default Time Upon Shipment (min.) |
| 10 |
5 |
| Display Sleep Mode Default Time Upon Shipment (min.) |
| 10 |
3 |
| Will the Speed of Any Active 1 GB/s or Higher Ethernet Network Links be Reduced to Less Than 1 GB/s When Transitioning to Sleep or Off Mode? |
| No |
No |
| Date Qualified |
| April 13, 2020 |
March 12, 2024 |
