Windows 7: High CPU usage while copying file over network

Hi,

for some reasons, while copying a 13 gb file over the network (accessed from \\servername\e$\ to my C drive, the CPU usage is going close to 100%.

When I look at task manager, I see System using more than 30% of the CPU, SMC.EXE is using between 15% and 18%...



Does anyone have an idea why system is taking that much CPU?

I tried disabling the antivirus to reduce the SMC.exe process, without success...

Looking for advices.

Thanks.

Dominic

Hi and welcome

First things first. could you fill in your system specs (lower left corner) so we know what kind of hardware you have

Ken

done

This guide shows you how to speed up your Windows Vista network transfer by disabling Remote Differential Compression (RDC) in Windows Vista.
Disable Remote Differential Compression

1. Open the Control Panel.
2. Open Programs and features.
3. Click Turn Windows features on or off.
4. Uncheck Remote Differential Compression.
5. Click OK.

I should have said I disabled this already...

I have also tried enabling the CCTP thing for the network card using netsh...

I would also turn off "tcp offload" for your nic.

what model NIC controller are you using?

I am using a Broadcom Netxtreme 57xx gigabit controller... I am reading everywhere that this setting should be turned on (recommended)...

I remember turning this off for certain applications on some 2003 servers, but on my workstation, I did not remember doing it. I will give this a shot and let you know how it turns out...

Thanks for the tip!

Dominic

Ok i just tried the chimney disabled, and it actually decreased the network performance. The CPU is still maxing at 100%...

I have turned it back on, but.... i am now asking myself, maybe it is normal that the CPU usage is high when copying files over network...

How is it acting on your workstations guys?