Hello ,
last year I bought the X10SDV-4C-TLN2F which has a an Intel Xeon D 1521 CPU .
It runs fine for a year now , but the power consumption could be better for a home server. I investigated the handbook and found out that Intel Steed Stepping wasn't enabled in the bios. Now I have enabled it and the cpu know downclocks itself ! Yihaaa .
But I thought that this also should improve the power consumption, but that is not the case... from 2400MHz to 800MHz and no difference ? Strange but ok ....
I checked the state of the cpu with
sysctl -a | grep cx
dev.cpu0.cx_method: C1/hlt
dev.cpu0.cx_lowest: C1
dev.cpu0.cx_supported: C1/1/1
It seems that it is not aware of c2 state .
Intel Datasheet
Ok , there're talking about the C2 State inside the datasheet , but maybe it is only a copy and paste failure?
My server is running 11.2 and even when booting 12.0 via usb cx_supported remains the same.
Do I have to contact Intel or does anyone know if the Xeon D does not support C2 Power Save State ?
best regards, sebastian
last year I bought the X10SDV-4C-TLN2F which has a an Intel Xeon D 1521 CPU .
It runs fine for a year now , but the power consumption could be better for a home server. I investigated the handbook and found out that Intel Steed Stepping wasn't enabled in the bios. Now I have enabled it and the cpu know downclocks itself ! Yihaaa .
But I thought that this also should improve the power consumption, but that is not the case... from 2400MHz to 800MHz and no difference ? Strange but ok ....
I checked the state of the cpu with
sysctl -a | grep cx
dev.cpu0.cx_method: C1/hlt
dev.cpu0.cx_lowest: C1
dev.cpu0.cx_supported: C1/1/1
It seems that it is not aware of c2 state .
Intel Datasheet
Code:
Idle States
Idle States (C-states) are used to save power when the processor is idle. C0 is the operational state, meaning that the CPU is doing useful work. C1 is the first idle state, C2 the second, and so on, where more power saving actions are taken for numerically higher C-states.
Ok , there're talking about the C2 State inside the datasheet , but maybe it is only a copy and paste failure?
My server is running 11.2 and even when booting 12.0 via usb cx_supported remains the same.
Do I have to contact Intel or does anyone know if the Xeon D does not support C2 Power Save State ?
best regards, sebastian