Forum Home
Press F1
Thread ID: 123211	2012-02-10 22:45:00	Slow network transfer speed under windows 7	dugimodo (138)	Press F1

Post ID	Timestamp	Content	User
1258554	2012-02-10 22:45:00	Ok bit long winded and I've actually fixed this, but I'm still confused/ concerned enough to see if anyone can explain it. I have a computer I use for downloading and video encoding tasks that has been running XP home and working perfectly. I upgraded to windows 7 64 bit to take advantage of the 8GB of RAM and video acceleration and have run into an odd problem. I have the download and encoding directories shared so I can use/ watch/ listen to the results over the network with my other 2 machines both running Windows 7. Under XP this worked perfectly, since the upgrade outgoing transfers from this machine are ridiculously slow and streaming goes in short bursts of a few seconds. In the opposite direction it works perfectly, and between the other 2 machines no problem. Network use when attempting to copy or stream from this machine is less than 1% at both ends. After googling everything I could think of I found this thread answers.microsoft.com and tried the suggested fix which was; Large Send Offload v2 (IPv4) - Disable Large Send Offload v2 (IPv6) - Disable (these are advanced network adapter configuration settings) Which seems to have fixed the issue. What has me confused is these settings are enabled on both other machines and it works perfectly from them. Can anyone shed some light on this ?? I also disabled the homegroup and went back to classic workgroup type sharing to no effect prior to trying this. If nothing else maybe this thread will help someone else :)	dugimodo (138)
1258555	2012-03-10 07:09:00	Dugimodo, The problem is not with Windows settings. Some of the settings posted on other blogs and forums work but never work 100%. After setting up a lab environment I found that its not specifically Windows as being the problem but the network card drivers. Including the ones from the manufacture. What I found was that the network adapter or switch DID NOT auto negociate correctly or if you are one that enters static settings like 100 FULL, the switch didn't detect my network card speed/duplex correctly. By playing around with the network speed/duplex options on the network card and watching the switch detect if it was connected at 100 FULL or even 1000 FULL. I ran a transfer file (10GB). Test was successfull. Once I got both systems to connect at the correct speed/duplex. Once I realized what the problem was... I went out and purchased a better switch <managed switch> and network adapters. Statically set my speed/duplex and confirmed detection on the switch. And the transfer test again... Everything is perfect. FULL SPEED. Another test you can do to test... Is run a cross-over cable to 2 computers... Make sure your settings on your network adapter are both set correct and run a transfer. I did this test also and got the same results. PERFECT SPEED. Hope this helps you and anyone else having problems. I truly believe its more of a hardware compatibility problem than just a Windows 7/Vista problem. I at least proved it in my own lab... And by the way... I did take my old configuration before starting with a clean environment on this test, and placed the new swtich in the mix... And everything worked perfectly. Good luck.	Hannible (16702)
1258556	2012-03-10 07:37:00	It may well be a driver issue, but the connection auto detects and connects at 1Gb/s just fine and internet download speeds or transfers TO the PC all work at full speed no problems. It is only outgoing transfers and the settings I posted do truly seem to have fixed the issue 100%, everything is back to working how it did under XP with windows 7.	dugimodo (138)
1258557	2012-03-10 23:14:00	My friend had this issue too. forums.bsodtv.org Think he found the same thing and disabled those settings.	nedkelly (9059)
1