B85M-G43 CPU won't go Package C6/C7

Hi there,
My problem affects the system in my sig but without the dedicated VGA. The idle power consumption of this system should be well under 20W, but it remains above - at around 23W (my power meter is working and measures with sufficing accuracy).
The tool Throttlestop v6.00 (from TechPowerUp website) shows me, that the CPU won't enter the deep package sleep states c6/c7, which would enable the Haswell chip to save the additional 5W in idle.
I enabled all the powersaving options / CPU features in BIOS (Intel C-State [enabled], C1E-Support [enabled], Package C State Limit [C7s]). I also tried a downgrade from BIOS v3.4 to v3.0, but the problem persists. Also disabling Ethernet, HDAudio and COM/LPT made no difference. Except from standard mouse, keyboard and LAN there is nothing else connected to the PC. A cross check with a fresh ArchLinux bootet from USB stick and Powertop also showed me that Package C6/C7 are not entered at all.
My question is, am I missing something? Is there anybody with this board whose CPU gets into those sleep states or whose system needs less than 20W?
Or is this really a bug in the BIOS?
Thanks very much, any help/ideas/suggestions are welcome!

Perhaps your OS sleep state option has to be enable to ensure that the processor sleep state can be envoked.
Perhaps the option is in the BIOS but has no effect currently as a lot of MB manufacturers opted not to enable it due to the following problems
Quote
the new Haswell processors enter a sleep state called C7 that can drop processor power usage as low as 0.05A. Even if the sleeping CPU is the only load on the +12V rail, most power supplies can handle a load this low. The potential problem comes up when there is still a substantial load on the power supply's non-primary rails (the +3.3V and +5V). If the load on these non-primary rails are above a certain threshold (which varies by PSU), the +12V can go out of spec (voltages greater than +12.6V). If the +12V is out of spec when the motherboard comes out of the sleep state, the PSU's protection may prevent the PSU from running and will cause the power supply to "latch off". This will require the user to cycle the power on their power supply using the power switch on the back of the unit.

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If no one here can assist at this stage, then you can always address your query here. http://us.msi.com/service/PreSaleForm/

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Dear Gg61,
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If you want to run 1866Mhz, please choose Z87M-G43.
http://www.msi.com/product/mb/Z87MG43.html
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Hi and
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Quote from: jellyman223 on 16-May-11, 11:37:22
The boot freezes exactly at 0:21
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Quote from: jellyman223 on 17-May-11, 02:50:11
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Quote
# Motherboard model MSI P67A-G43 (B3) (NVIDIA VGA BIOS KK1) USING MSI Live Update for VGA
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null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;
null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;
null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;
null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;
null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;
null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;
null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;
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null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;
null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;
null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;
null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;null;
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Solved!
Go to Solution.

ThinkPads are NOT designed to be used without a battery installed.
The only time that one should remove the battery from the machine is when it's dead, since running with a dead battery installed can - and eventually will - damage the charging circuit.
Cheers,
George
In daily use: R60F, R500F, T61, T410
Collecting dust: T60
Enjoying retirement: A31p, T42p,
Non-ThinkPads: Panasonic CF-31 & CF-52, HP 8760W
Starting Thursday, 08/14/2014 I'll be away from the forums until further notice. Please do NOT send private messages since I won't be able to read them. Thank you.

B85M-G43 CPU won't go Package C6/C7

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