Power consumption during gaming
Let’s now look at the power consumption in games, where the slightly higher TBP of 480 watts is put into perspective very quickly, depending on the resolution and feature set of course. In QHD, the new card is hardly thirstier on average than a GeForce RTX 3080 10GB, which may certainly also be due to the CPU limiting, but it also indicates an enormously increased efficiency. However, the Founders Edition still has a slight advantage here.
Even in Ultra-HD without a CPU limit, it is only just behind the GeForce RTX 3090 and the FE, which is again astonishing. However, I’ll come to the efficiency analysis across all cards and resolutions later. First of all, it’s about the wattage numbers and they are still more than just pleasing despite the slight OC.
If you use the supersampling helpers, the picture is reversed because the actually powerful CPU is slightly limited again. But we can also state here that the new GeForce RTX 4090 is the measure of all things when you put everything in relation to the gaming performance achieved, because even the overclocked MSI RTX 4090 SUPRIM LIQUID X is even more restrained than the old RTX 3090 FE.
Power consumption in factory state as summary
Yes, I did run Furmark at just under 525 watts with the Power Target set to maximum, but that’s basically pointless and purely for the gallery. But again, I briefly checked the load peaks and found nothing that would contradict all the other measurements and statements. What is a real step backwards from my point of view is the very high idle power consumption, which rarely falls below 37 watts even when the GPU is heavily downclocked. The few watts for the pump are rather uncritical, so I would rather blame the high value on the lack of downclocking of the PCIe slot at idle. AMD still has to improve on that.
We can see from the BIOS limits that the card comes to the customer with a preset power limit of 480 watts in gaming mode, although the limit can be raised to 530 watts. I’ll get to that in a minute.
Load sharing between PCIe slot and external 12VHPWR connector
MSI has connected all 13 phases or the controlled 26 control loops to the 12VHPWR, which makes sense that way. The PCI-SIG says in the PCIe 5.0 specification that the card may consume a maximum of 600 watts of power in the sum of all 12V connections. Although this will never be achieved in extreme cases, it still leaves many reserves within the permissible tolerances even in this design. Instead of the maximum possible 5.5 A, it is only 1.7 A in the measurements, even in extreme cases, which is about 20.4 watts. The card should generate various extra-low voltages here, which hardly change as a load even when overclocking.
The main load is thus almost exclusively via the 12+4 pin connector (12VHPWR), which got up to 68 °C hot after about 1 hour of full load during operation with the 4-pin adapter (4x 6+2) on the card. However, the board where the connector is soldered has already reached a temperature of more than 56 °C by then. I don’t really like this solution, but 480 to 520 watts is still within the painless range.
- 1 - Introduction, technical data and technology
- 2 - Test System and the igor'sLAB MIFCOM-PC
- 3 - Teardown: PCB and Cooling System
- 4 - Gaming Performance
- 5 - Power Consumption and Load Balancing
- 6 - Load peaks, capping and PSU recommendation
- 7 - Temperatures, Clock Rate, OC, Fan Speed and Noise
- 8 - Summary and Conclusion
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