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Windows 7: Power option PCI express Link State Power Mgmt

27 Jun 2012   #1

Power option PCI express Link State Power Mgmt


I've done a lot of searches using variations of the above title and came up empty or just plain missed the answer.

I'd like to know, if it is not asking too much, the following points:

1. What exactly is the function of Link State Power Management in the Power Options Advanced Settings, PCI Express?

2. What are the implications of using the options available:

a) Off.
b) Maximum power savings.
c) Moderate power savings.
d) Which option is the best selection for my Dell laptop.

I'd appreciate a feedback on these points.

Thank You for Your time and patience.

My System SpecsSystem Spec
27 Jun 2012   #2

XP / Win7 x64 Pro

The function of that power management feature is to manage the power consumed by your PCI devices. PCI components require constant streaming of data when in use so configuring power management to shut them down, or reduce the data stream, when not in use can save some power, which really only has a substantial effect in laptop power savings. The wireless card is usually a PCI component in a laptop, so configuring it for maximum power savings might shut it off when it's not in immediate use. This might introduce some lag into your wireless connection upon first use of the wireless or even during use (if the system decides to shut it down between connections). It's hard to say what impact it will have for you. If you're not extremely worried about getting that extra small fraction of life out of your laptop, I'd leave it alone and configure it not to use power management (keep them on all the time). Otherwise, you can try out the different settings and see if you notice a difference.
My System SpecsSystem Spec
16 Jul 2012   #3

Windows 7 Home Premium 64bit

ty guys great info, i was looking for this too im setting it OFF for best perfomance right away!
My System SpecsSystem Spec
19 Jul 2012   #4


Hello FliGI7,

Thank you for the excellent reply.

I apologize for returning to you so late, but I've been travellig abroad and had my hands full.

I'll follow your recomendation, and I don't think that it's worth sequeezing some extra juice from the laptop. It is fairly old one so whatever happens, I will have to move to a newer model anyway.

Best Regards
My System SpecsSystem Spec

 Power option PCI express Link State Power Mgmt

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