set to 3500.  Two users concurrently downloading (my client uploading to theirs) with the total rate peaking at 4.5 MB/s.  Is this feature meant to limit the global rate?

if the bandwidth limiter is only set on upload, the protocol will use more overhead on upload when downloading, you need both on to balance it out. you may also find that with download limiter on, things download smoother, and quite often a bit faster... be patient, it will take time to tweak it just right for your connection.

Have set both Incoming and Outgoing to 750 KB/s.  Got 4 uploads with a total rate at 2.6 MB/s (it varies).  If no downloads are occurring, should I expect the global upload rate to be no greater than 1.5 MB/s or something else?

If you have set your Outgoing limit to 750 KB/s, you should logically expect your total upload rate to stay at or below that cap, regardless of how many individual uploads are running.

However, based on the behavior you're describing (seeing 2.6 MB/s despite a 750 KB/s limit), there are a few technical reasons why the "math isn't mathing."

Why you are seeing 2.6 MB/s

If your limit is set to 750 KB/s but you are hitting 2.6 MB/s, one of the following is likely happening:

   Unit Confusion (KB vs. Kb): This is the most common culprit. In networking, KB (Kilobytes) and Kb (Kilobits) are very different.

       1 Byte=8 bits

       If you set a limit of 750 KB/s, that is roughly 6 Mbps (Megabits per second).

       If Fopnu is displaying your transfer rate in Mbps or a different unit than the limit you set, the numbers will look inflated.

   Protocol Overhead: Speed limits usually apply to the payload (the actual file data). They often don't account for the "overhead" (the headers and routing info required to move the data). However, overhead wouldn't usually account for a jump from 750 KB/s to 2.6 MB/s—that’s too large a gap.

   Interface vs. Global Limits: Ensure you haven't set a limit on a specific transfer or category while leaving the main network interface wide open.

What you should expect

If the software is functioning correctly and the units match:

   Incoming (Download): 750 KB/s max.

   Outgoing (Upload): 750 KB/s max.

   Total Throughput: Even with 4 uploads, they should share that 750 KB/s. You should not expect 1.5 MB/s (which would be 750+750).

The Outgoing limit is a ceiling for the sum of all uploads. If you have 4 uploads, they might each get roughly 187.5 KB/s, totaling 750 KB/s.

Quick Tip: Check the "Settings > Network" tab again to ensure the unit dropdown hasn't swapped from KB/s to Mbps.

Displaying as MB/s rather than mbps.  Is there anything else I can try?

are you in any channels? That will increase your bandwidth, but it still shouldn't be over the limit you set.

Yeah, one channel.  Thanks for the reply.