Z790M + 13600K (no E-Core) = idle CPU at 1.35v

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   Hello, 

this is regrading 13600K on ASRock Z790M PG Lightning/D4.

I tried to check how the system behaves with E-Cores turned off - responsivness increased under moderate load but there is strange effect (according to LibreHardwareMonitor):
 - at idle time motherboard sets voltage on CPU package of around 1.35..1.4V and that makes power consumption of CPU package at around 25..30W at absolutely idle state. 
 - under heavy load CPU voltage gets lower to around 1.15 .. 1.2v. 

This is strange - I expect it should be opposite: at idle time voltage is near 1.0V and under load - around 1.3V.

This happens with default BIOS setting (v11.02).

...

With both P-Core and E-Cores turned 'on' everything seems normal:
 - at idle power consumption is below 10W and voltage is around 0.9V
 - under heavy load - voltage is up to 1.4V with power up to 250W

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xtraco Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 10 May 2024 Status: Offline Points: 40	Post Options Post Reply Quote xtraco Report Post Thanks(0) Quote Reply Topic: Z790M + 13600K (no E-Core) = idle CPU at 1.35v Posted: 14 May 2024 at 8:17am
	Hello, this is regrading 13600K on ASRock Z790M PG Lightning/D4. I tried to check how the system behaves with E-Cores turned off - responsivness increased under moderate load but there is strange effect (according to LibreHardwareMonitor): - at idle time motherboard sets voltage on CPU package of around 1.35..1.4V and that makes power consumption of CPU package at around 25..30W at absolutely idle state. - under heavy load CPU voltage gets lower to around 1.15 .. 1.2v. This is strange - I expect it should be opposite: at idle time voltage is near 1.0V and under load - around 1.3V. This happens with default BIOS setting (v11.02). ... With both P-Core and E-Cores turned 'on' everything seems normal: - at idle power consumption is below 10W and voltage is around 0.9V - under heavy load - voltage is up to 1.4V with power up to 250W

KeizerGamer Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 25 May 2024 Location: Oregon Status: Offline Points: 95	Post Options Post Reply Quote KeizerGamer Report Post Thanks(0) Quote Reply Posted: 25 May 2024 at 2:25am
	I have the same MOBO, it is purely due to the P-Cores taking up all the extra work. Also, if you haven't done so, theres a BIOS update for our MOBO, v11.04.
	-Stephen For when you think you have enough, add some more