Power consumption and compliance with standards
The maximum values of a very demanding scene are not the whole truth, because the power consumption of fast cards is actually very resolution-dependent. However, the new GeForce RTX 3060 is more in the league of the smaller cards, which gives the all-clear when it comes to CPU bottleneck. What this means in detail, I had already analyzed when it came to the combined power consumption with the CPU and their individual listings. If you also add up the power consumption in WQHD, which I measured in all games over the entire runtime, then everything is back at the stated (just under) 170 watts for the TBP, so precision landing, because the CPU does not limit here. First of all, the respective average over all resolutions, games and graphics cards:
There aren’t really any big secrets when it comes to power consumption, because what NVIDIA specifies as TBP for the GeForce RTX 3060 is largely adhered to. With approx. 12 watts in idle one lies in the usable range, it is surely also due to the RGB of the board partner card. The partial load ranges are realized relatively sparingly, which could also be due to the moderately regulated cycle. However, the card reaches around 175 watts at real full load in Control with Ultra HD and full warming, which is 5 watts more than predicted and stated in the specs.
Which brings us to the specifications, because in the end it is clearly regulated by firmware what is possible as well as maximum and minimum. A maximum of 180 watts power limit is allowed for the board partner card, which can be accessed with the appropriate software, but is also somewhat pointless, as it hardly changes anything in terms of performance.
Now let’s look at the load of the motherboard slot, which is specified by the PCI SIG with 5.5 Amps. This results in a maximum power of 66 watts at 12 volts. It can be seen very clearly that this limit is undercut by 1.6 to 1.7 A under full load, even if the maximum power limit is used. The fact that the 12-pin is only connected to one phase is completely sufficient and the balancing is also better than with the RTX 3070.
The slightly more detailed curve for Gaming and Torture looks like this, with the long 20 ms intervals still very granular.
Transients and power supply recommendation
As I have already demonstrated in detail in my basic article “The battle of graphics card versus power supply – power consumption and load peaks demystified”, higher loads in the millisecond range do exist for short periods of time, which can already lead to inexplicable shutdowns in the case of poorly designed or improperly equipped power supplies. The TBP (Typical Board Power) measured by the graphics card manufacturer or the reviewers is not really helpful for a stable system design.
Peaks with intervals between 1 and 10 ms can lead to shutdowns in very fast reacting protection circuits (OPP, OCP), especially in multi-rail power supplies, although the average power consumption is still within the norm. For this card, I would therefore calculate a graphics card load of at least 230 to 250 watts proportionate to the total system power consumption on the secondary side, in order to have sufficient reserves for the worst case scenario. A short excerpt with higher resolution now shows us the 20-ms measurements (10 μS intervals), as I run them automatically to determine the value:
- 1 - Introduction, technical data and test system
- 2 - Teardown, PCB and cooler in detail
- 3 - Gaming Performance Full-HD
- 4 - Gaming Performance WQHD
- 5 - Details: Frames per Second (Curve)
- 6 - Details: Percentiles (Curve)
- 7 - Details: Frame Times (Curve)
- 8 - Details: Frame Times (Bar)
- 9 - Details: Variances (Bar)
- 10 - Studio Applications
- 11 -
- 12 - Power Cinsumption, Transients and PSU recommendation
- 13 - Temperatures, clock rate and infrared
- 14 - Fan speed and noise
- 15 - NVIDIA Broadcast - more than a gimmick?
- 16 - Summary, features and conlusion
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