I have Googled this issue pretty thoroughly and tried everything suggested with no luck. Here’s the deal.
I have two computers, a 12-year old i-Mac and a PC gaming rig that’s about a year old (i9-14k, 64k Ram ROG MB). Both are connected to a RT-AX88U PRO router and then to a Synology DS423+. When I upload a large file (20-30 GB) to the NAS from the i-Mac, I get speeds between 80-120 MB/s like below. Great, file uploads in just a couple minutes.
However, when I try to do the same with the PC, I cannot get anything above 15 MB/s or so.
I did a speed check on the PC and obviously the computer is not having an issue with uploads in general. If I’m doing the math correctly, the results below should be giving me around 118 MB/s (like the i-Mac is seeing).
Things I’ve tried on the PC so far:
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I swapped out the CAT5 cable for CAT6. This gave me a small jump from 12 MB/s to the current 15.
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Link speed in Windows is set to Automatically negotiate. I manually set it to 1000 full-duplex but that had no effect so I put it back to Auto.
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LAN drivers, Windows, and Router FW are all up to date.
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I plugged the network cable from the i-Mac into the router port the PC had been using and still got around 100 MB/s so I know that particular port is not the issue. I also did the reverse, I plugged the PC cable into the i-Mac port on the router and still got only 15 MB/s.
At this point, *I think* I can rule out the PC or the router as the bottleneck, that just leaves the NAS, right? Is there some setting that would cause two remote systems to be treated differently?
One last data point. When I upload a file from the i-Mac, the drives in the NAS make the usual “crunching” sound that is constant and steady. However, when I transfer from the PC, the drives sound like Kachunk…Kachunk…Kachunk…Kachunk, the entire time the file is transferring (I feel like I’m describing sounds to my auto mechanic). The system is behaving very differently between the two computers.
Thanks in advance for any help.
