Extremely slow file transfers and network access...

Hrm, is it common for Flow Control to somehow get changed? It's already "Disabled" on all of my Windows 7 systems.

EDIT: Found one. A Marvell Yukon gig NIC had "Tx and Rx Enabled". Interesting.

You should try disabling the RDC in the Windows features.

I had the same problem but came across this info on the Windows Reference site.

Changed the setting, didn't even have to reboot and the network was rocking again.

Moza said:

You should try disabling the RDC in the Windows features.

I had the same problem but came across this info on the Windows Reference site.

Changed the setting, didn't even have to reboot and the network was rocking again.

That would be an incorrect assessment.

Moza said:

You should try disabling the RDC in the Windows features.

I had the same problem but came across this info on the Windows Reference site.

Changed the setting, didn't even have to reboot and the network was rocking again.

This has been completely debunked by MS:

The Storage Team at Microsoft - File Cabinet Blog : Debunking Myths about Remote Differential Compression and System Performance

I have some sort of the same problem. Right after reboot it works perfect. But some time later is slows down. But not so straight forward. When I copy files using Windows 7 from XP host it works on full speed (1 GB/s). But when I try to copy using XP from Windows 7 host it gives me 2-3 MB/s or even less. So I tried to change NIC settings to no avail. Tried to restart different services. After I restarted Windows Firewall service (Firewall was disabled but service is running) it started working again on full speed. So may be that helps someone else.

Try running this from an admin cmd prompt

netsh interface tcp set global chimney=disabled

Mondo Tech: Windows 7 Slow Network access

You Had Me At EHLO... : Windows 2003 Scalable Networking pack and its possible effects on Exchange

Mondo1287 said:

Try running this from an admin cmd prompt

netsh interface tcp set global chimney=disabled

Yet if that is not the problem you should turn it back on.

http://windows.microsoft.com/en-US/w...himney-Offload

TCP Chimney Offload is a networking technology that allows the work associated with moving data across a network to be offloaded from the host computer's CPU to the network adapter.

I am having a similar problem - Win7 x64 Ultimate (retail) on an ASUS AMD mobo (AN8-SLI) with nForce4 Gb Ethernet built-in. Clean Win7 load (not an upgrade). I am using Samba file shares on Ubuntu and Buffalo HomeStation, file transfer is 1/10 the speed when this was running XP - getting 350KB/s. At first I thought it might be a problem with SMB and non-Windows servers, so I tried the same transfer over http. I setup the Win7 as a web server and used a browser to download the file on the Ubuntu - some improvement, up to 500KB/s, but I attribute that to the protocol. Networking in Task Manager shows 1Gbps link with utilitzation around 1% while copying over http and 0.5% using a file share.

I am using the latest NVidia drivers (15.51) for the nForce ethernet, but the speed option under Advanced only shows up to 100Mb full duplex, so I left it at autonegotiate. The switch indicates it's running at 1Gbps and so does the Task Manager, but it's behaving like it only running at 100Mbps - I'm beginning to suspect the driver is guilty, especially with the 10x loss of speed. I used to copy 25GB in 2 hours, now it says it will take 20 hours.

Hello,

I have exactly the same problem. I intended to remote access to my windows 7 machine from multiple computers, however this is incredibly slow compared to XP-XP. Also file transfer is stupid slow.
I have hardly put any software on yet after the clean install. Just VMWare.
Has there been a solution to this yet?

I posted this issue to Microsoft (after some further research) and they solved it for me! They asked if my router was on the Windows 7 compatibility list, and that seemed really strange since 802.3 (Ethernet) has been around a long time and why would that suddenly change with the O/S? But I unplugged my PC from the Trendnet Gb router and plugged it into the old Linksys 100Mb and BAM - full network speed! On the Gb router, I couldn't get above 2% in the monitor on a file transfer - on this "compatible" one, I get 100% and file transfers are screeming.