Max. simultaneous downloads/connections(Chunks)

In your Downloadlist, you will find four "Quicksettings" on the bottom right corner.
If you cannot find them, you will have to enable them first as shown in the following screenshot:

Description:

1. Top left: Max. chunks per download
2. Top right: Max. simultaneous downloads
3. Bottom left: Max, simultaneous downloads per host
4. Bottom right: Enable/Disable Speedlimit

JDownloader has a global limit of max. 20 simultaneous downloads and max. 20 simultaneous connections per file ("Chunks").

Please keep in mind: Using higher values will not necessarily increase your download speed!
If you e.g. set JD to use max. 20 simultaneous downloads and 20 chunks, it would theoretically establish 20 * 20 = 400 total connections which is way too much for most of all users.
There is no "perfect" setting but 5 downloads with 3 connections each should be enough for most users.

Troubleshooting and FAQ

I'm experiencing slow download speed, what can I do?

Read our slow speed article.

Is there any way to exceed the global limit of 20 simultaneous downloads?

Yes, using so called Domain Rules.

Are there any optimal settings such as a combination of max. simultaneous downloads and max. connections per file to get the best download speeds?

No. This depends on a lot of different factors. More information can be found here and in our slow speed article.

I've setup JDownloader to use XY max chunks/downloads but it is only allowing less than that, why?

Keep in mind that depending on the host you're downloading from and whether you own a premium account or not, there might be serverside limits in place which could prevent JD from simply obeying your settings- and reaching your desired amount of e.g. max. simultaneous downloads.
This means that if you e.g. set JDownloader to use 5 chunks, you might just get 1 in the end.
Also if you're downloading from the Usenet: JDownloader can technically only download with max. 1 chunk via Usenet!