michaelronson
New member
- Local time
- 11:03 AM
- Messages
- 3
I've been having this problem off and on since I installed W7 that my CPU is spiking during low network use (e.g. 2-3mbit/sec).
My setup is W7 (32), Core 2 Quad Q6600 @ 2.4 ghz, Asus P5E-VMDO, 8gb memory.
Network Adapter is an embedded Intel 82566DM-2 Gigabit. No other network adapters are present. If I disable the adapter, the problem goes away.
Upon further inspection using Procexp I narrowed down the cpu spike to ndis.sys
As an example:
Downloading a file at 300kbytes/sec will spike the ndis.sys process to 16-20% of the total CPU. It will actually drag the computer to the point where a video playing will stutter.
The program I use to transfer data doesn't matter (obviously considering disabling the network adapter resolves all problems)
The start address in procexp is "ndis.sys!Ndispacketsize+0x201f"
As soon as the download is complete the total CPU use with regular network "chatter" (total of maybe 100kbit/sec) drops down to between 1-3%.
So the question is, why is the CPU spiking?
First obvious question I would have is, "Is the driver correct?". Well, it's the driver that Windows 7 went out, found, and installed, so I presume it is. The driver is a Microsoft driver Version 9.13.4.10 dated 03/26/2009 and it is the "latest" driver (e.g. an effort to update the driver says I'm using the latest one).
I have turned off all extra settings including WOL and Power Management.
I have not hacked or tweaked with the network settings nor do I run any software that tries to optimize or hack network settings.
Any ideas? BIOS issues perhaps?
It occurred to me that perhaps this was a rootkit but at this point I've scanned the system enough times (with enough programs) that I doubt this is the case.
Thanks!
Mike
My setup is W7 (32), Core 2 Quad Q6600 @ 2.4 ghz, Asus P5E-VMDO, 8gb memory.
Network Adapter is an embedded Intel 82566DM-2 Gigabit. No other network adapters are present. If I disable the adapter, the problem goes away.
Upon further inspection using Procexp I narrowed down the cpu spike to ndis.sys
As an example:
Downloading a file at 300kbytes/sec will spike the ndis.sys process to 16-20% of the total CPU. It will actually drag the computer to the point where a video playing will stutter.
The program I use to transfer data doesn't matter (obviously considering disabling the network adapter resolves all problems)
The start address in procexp is "ndis.sys!Ndispacketsize+0x201f"
As soon as the download is complete the total CPU use with regular network "chatter" (total of maybe 100kbit/sec) drops down to between 1-3%.
So the question is, why is the CPU spiking?
First obvious question I would have is, "Is the driver correct?". Well, it's the driver that Windows 7 went out, found, and installed, so I presume it is. The driver is a Microsoft driver Version 9.13.4.10 dated 03/26/2009 and it is the "latest" driver (e.g. an effort to update the driver says I'm using the latest one).
I have turned off all extra settings including WOL and Power Management.
I have not hacked or tweaked with the network settings nor do I run any software that tries to optimize or hack network settings.
Any ideas? BIOS issues perhaps?
It occurred to me that perhaps this was a rootkit but at this point I've scanned the system enough times (with enough programs) that I doubt this is the case.
Thanks!
Mike
My Computer
- OS
- windows 7
