I did a clean Win 25H2 install and after configuring the 10Gb NIC I tested the direct connection between my PC and my NAS. Prior to the installation, transfer speeds were 650-750 MB/s read and 500-600 MB/s write. Now both speeds are ~400 MB/s.
HW and SW info:
- QNAP TS-932X-8G
QLogic BCM57811 10GbE NIC (most recent driver)
Direct connection (SFP+)
5x HDD 4GB 7.2k RPM
MTU: 9000 (both sides)
Static IP
IPv6 disabled
It’s the same configuration as before.
On my 2nd PC, I have a similar configuration (HW and SW) and transfer speeds are still fine.
Any idea what could be the reason for this difference?
I tried 3 different drivers, but no impact on the transfer speed. Again, I’m using the same driver on the other PC.
I’m using the same antivirus (Avast) as before and disabling it completely made no difference.
Thanks for the suggestions!
Sometimes, a clean install can introduce many changes or additional options and applications that are default as part of the basic installation. By continually “updating / upgrading”, your preference for not including some of these applications or options are carried forward.
I’m not saying this is or is not a problem in your case, but I am saying that you cannot really compare for previous configuration directly with the fresh installation as there are many differences. Even things like swap file management and a lot of the other under the covers things are completely different on a “new” install vs an “upgrade”, particularly legacy registry settings.
Are the numbers quoted based on running a speed testing application or just a general observance?
Hopefully, someone will have some other ideas of things to check.
If I’m reading this right, it is a problem with the Win25 installation on the first PC, rather than anything to do with the NAS itself.
I had a slightly similar issue with a Win10 PC a few years ago and found that the NIC card had reverted to half-duplex. It should have been obvious looking at the port properties on the PC, but it wasn’t. However, checking the router I found that’s what the PC had negotiated. Forcing Full-duplex on the LAN card, rather than Auto, followed by a restart, fixed the problem. I’m not sure if that’s even a thing with modern 10Gb NICs but hopefully it might give you a clue
I’m following my checklist while installing and configuring Windows, but I’m aware of the fact that it might not be the same result as one gets after upgrading.
I’ve tested the transfer speeds several times just to be sure.
