Power Consumption & Temperatures
Power Consumption
In an IDLE state, a PC (motherboard / processor / GTX 1080 / memory / SSD) consumes roughly 60~70 Watts. This number depends and will vary per motherboard (added ICs / controllers / wifi / Bluetooth) and PSU (efficiency). Keep in mind that we measure the ENTIRE PC, not just the processor's power consumption. Your average PC can differ from our numbers if you add optical drives, HDDs, soundcards etc.
* In red, Threadripper 2970X
I want to make it very clear that power consumption measurements will differ per PC and setup. Your attached components use power but your motherboard can also have additional ICs installed like an audio controller, 3rd party chips, network controllers, extra SATA controllers, extra USB controllers, and so on. These parts all consume power, so these results are a subjective indication. Next to that, we stress all CPU cores 100% and thus show peak power consumption. Unless you transcode video with the right software your average power consumption will be much lower.
So, the above screenshot tells us so much info - We use LCS. Threadripper 2970WX is being stressed with a couple of 1024M Prime runs. You can see a reported 55 Degrees C for the die temperature which is the true stress temperature. For the tCTL, look below. Below, you can read how that works.
Temperature Reporting
To keep a "consistent fan policy," AMD is forcing a 27C offset on all models Ryzen Threadripper processors. This makes them report the temperature a good 10C above what the sensor reads. The other models on the AM4 Platform have the same maximum tCTL value. The primary temperature reporting sensor of the AMD Ryzen processor is a sensor called “T Control,” or tCTL for short. The tCTL sensor is derived from the junction (Tj) temperature—the interface point between the die and heatspreader—but it may be offset on certain CPU models so that all models on the AM4 Platform have the same maximum tCTL value. This approach ensures that all AMD Ryzen and thus Ryzen Threadripper processors have a consistent fan policy.
| Product Name | True Junction Temp (Tdie) | tCTL Offset for Fan Policy | Temp Reported by (tCTL) |
|---|---|---|---|
| Threadripper 29xx | 43°C | 27°C | 70°C |
| Threadripper 19xx | 43°C | 27°C | 70°C |
| Ryzen 7 2700X | 38°C | 10°C | 48°C |
| Ryzen 7 2700 | 38°C | 0°C | 38°C |
| Ryzen 5 2600X | 38°C | 0°C | 38°C |
| Ryzen 5 2600 | 38°C | 0°C | 38°C |
| Ryzen 7 1800X | 38°C | 20°C | 58°C |
| Ryzen 7 1700X | 38°C | 20°C | 58°C |
| Ryzen 7 1700 | 38°C | 0°C | 38°C |
In short, if you use any monitoring software, you need to look at the Tdie as temperature, it's the correct one to look at.
