Why does dragging a large network file take 7 seconds on CPUOld but 7 seconds on CPUNew?

I have Database.mdb which is a 570 meg file on a Windows Server 2016 shared directory.  

When I drag it to  \\CPUDesk c: drive it takes 10 seconds.  This is a $400 windows 7 proiDell Inspiron 620 desktop that is 6 years old.

When I drag it to a \\CPULap c: drive it takes 50 seconds.  That is a brand new $700 windows 10 pro Dell Inspiron 15 laptop with a fast i7 chip and 8gig memory and a super fast SSD SanDisk x400.

I am shocked that an old cheap desktop is so much faster than the latest technology laptop.

At first I thought it might be a bad Cat 5 cable or switch port, so I swapped the laptop and the desktop and reran the test with the same result.

CPULap has a 1000 gig NIC which is confirmed because the network switch shows two green LEDs.  

Does anybody have any ideas of how I can trouble shoot this?  


P.S.  At the risk of giving "Too Much Information", here are some additional facts, to muddle the picture.

I tested the copy on other cpus
*1 year old windows 10 pro laptop ($1300 quad core Lenovo t460p) also took 50 seconds.
*3 year old windows 10 pro desktop took 10 seconds
*3 year old windows 10 pro desktop took 10 seconds
* 5 year old windows 7 pro desktop took 10 seconds
* 4 year old windows 7 pro desktop took 50 seconds

* 2 month old windows 2016 server took 1 second (no surprise, because that copy didn't even go through the switch.)
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NerdsOfTechTechnology ScientistCommented:
Security is probably the biggest factor (i.e. antivirus, firewall, windows defender, routing firewall/SPI [Stateful packet inspection], services, etc.) *most likely factor*

Network port speed. 10/100 or 10/100/1000 for these computers' ethernet adapter?

Try pinging the server from those computers.

Turn off any wireless connection when testing, if any of the two test computers to eliminate network options.

Try with individual direct connections (eliminate switches/hubs). Similar results? If so, see #1 above. Check installed security programs.

P.S. Maybe the old adage applies:
they don't build them like they use to
That would certainly irritate the heck out of me as well regarding a new i7 laptop with an SSD! Assuming all your facts are accurate, we can rule out the server as well as the switch and the cabling. That only leaves nearly a zillion possibilities on the client computers. We have possibilities in NIC drivers and firmware, and software processes such as A/V and other types of process and disk monitoring services. Some network adapters are just inherently less capable than others but that shouldn't add up to results like you're recording. Also, there is SMB v1, v2, and v3 which can affect transfer rates. Here's a link on items to tinker with regarding SMB:


Just so you're comparing accurately, make sure that any antivirus or disk defragmenting utilities (etc.) are disabled. Also, check whether jumbo frames are enabled in the NIC driver settings for each PC. There are variety of options in there to compare and to play with also. Just for kicks, and to gather more data, why not try those data transfers tests over a different protocol such as FTP and see what rates you get. You're certainly not the first to notice the mystery in getting different results with network performance among different client PCs. I'd like to hear more about how your testing goes!

Lee W, MVPTechnology and Business Process AdvisorCommented:
$ doesn't matter.  No need to tell us what you paid.

Is the laptop WIRED or WIRELESS?

Disk is the slowest major component of most systems.  CPU doesn't matter much (though I think you're incorrectly referring to the computer as a CPU).

There are a lot of factors that contribute to poor network performance.  Antivirus, fragmentation (on both source and destination systems), media (wired/wireless), duplex (full/half), negotiated connection speeds (10Mbit/100Mbit/1000Mbit), Network adapter drivers, and more.
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try dragging it to a folder in My documents - is it the same time ?
50s for 570 MB is about 11 MB/s which is a typical 100MBit/s speed (100MBit=12,5 MB). So quite sure, some components have trouble using the 1000MBit/s mode. Simply exchange cables and switches/switchports as long as you find out which.

If it is not the hardware, try different NIC drivers. If that does not help, download and boot knoppix and retest with it.
Antivirus needs to be kept out of this, so if you wanted to make sure, it would need to be uninstalled anywhere.

Another info: with GBit/s speed, you would even expect it to be faster than 10s - no matter how good the device is, as long as the hard drives of all components work at a speed higher than 1 GBit/s. SSDs can do that easily, newer HDDs, too, as long as the files you copy are large, so sequential reading/writing takes place.

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i would assume it is an antivirus tool which checks the mdb file while copying. older computers may have a less restrictive a/v settings or even don't check internal file traffic at all.

rberkeConsultantAuthor Commented:
I am embarrassed and owe you all an apology for wasting your time,

It turns out my earlier troubleshooting was sloppy due to a rat's nest of wires and a intermediate 5 port switch which I had not noticed.

I was more careful today and I now know the new Dell was simply a bad NIC, and my expensive Lenovo simply had a bad cable.  

Problems will soon be fixed and I am closing this problem.

Well, I'm glad you got it all sorted out but I have egg on my face in assuming that all these devices were connected to the same switch with the same cables. Clean out the rats nests! :)
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