Hi, Yes, they are 4k monitors. Any reason for such and expected boost for them?
BTW: I try to increase blanking periods for both monitors without any change. Jaroslav P. > > [AMD Official Use Only - AMD Internal Distribution Only] > > Hi Jaroslav, > Are both of your monitors 4K resolution? > Then most likely the memory clock is expected to be boosted. > Thanks. > > > -----Original Message----- > From: amd-gfx <[email protected]> On Behalf Of Alex > Deucher > Sent: Monday, July 1, 2024 11:07 PM > To: Jaroslav Pulchart <[email protected]> > Cc: [email protected] > Subject: Re: High Power Consumption of AMD RX6800xt in Idle with Secondary > Monitor Connected > > Caution: This message originated from an External Source. Use proper caution > when opening attachments, clicking links, or responding. > > > On Mon, Jul 1, 2024 at 3:25 AM Jaroslav Pulchart > <[email protected]> wrote: > > > > Dear AMD GPU Kernel Maintainers, > > > > I am writing to report an issue with high power consumption of my AMD > > RX6800xt graphics card when a secondary monitor is connected. > > > > Upon investigation, I observed that my desktop computer generates more > > heat while idling. I determined that the high power consumption issue > > arises when I connect a secondary monitor to my AMD RX6800xt card, > > causing it to consume approximately 40W of power in idle state . > > > > I checked the "GFX Clocks and Power:" in > > /sys/kernel/debug/dri/1/amdgpu_pm_info of my RX6800xt during idle, and > > here are the findings: > > > > With the secondary monitor connected memory frequency is up and > > constantly at 1000MHz: > > 1000 MHz (MCLK) > > 3 MHz (SCLK) > > 1825 MHz (PSTATE_SCLK) > > 1000 MHz (PSTATE_MCLK) > > 856 mV (VDDGFX) > > 45.00 W (average SoC) > > > > Single monitor connected: > > 96 MHz (MCLK) > > 0 MHz (SCLK) > > 1825 MHz (PSTATE_SCLK) > > 1000 MHz (PSTATE_MCLK) > > 6 mV (VDDGFX) > > 8.00 W (average SoC) > > > > The significant difference in power consumption between the two states > > indicates a potential issue in power management that needs to be > > addressed. Your assistance in resolving this matter would be greatly > > appreciated. > > It depends on the timing of the monitors. The memory reclocking can only > occur during blanking periods on the monitors. If the reclocking is done > outside of the blanking periods, you will see flickering or artifacts on the > display when it happens. If the blanking periods are too short the driver > can only downclock memory when the displays are off. Adding more monitors > makes this harder as you have to take into account the blanking periods on > all monitors. You can try adjusting the modelines used on each display to > increase the blanking periods. > > Alex
