BenQ has had some problems with their latest bios updates that tend to manifest in this way (slow 2.4X burning - typically with very poor quality). Consider backflashing to an earlier bios and see if the problem goes away.
Also, how is your “no-name” burner identified? Chances are it’s a rebadge of one of the bigger names and the people in this forum may well know what it really is.
Finally, what is the “MID” code of the media that you are burning? You can use CDSpeed (CD-DVD Speed is a free download at http://www.cdspeed2000.com/) and the BenQ drive to provide that information. Launch CDSpeed and click on the “Disc Quality” tab. Next, look for the label “ID:” located near the upper-right corner - the MID code is located just to the right of this label.
An aside - it is often useful to use CDSpeed’s “Disc Quality” function to evaluate how well a burner is actually burning the discs. Burn quality typically varies wildly between both burner manufacturers and disc types.
The BenQ drive allows you to use CDSpeed to read any DVD and provide a graphical presentation of errors found on it. All DVD discs, whether store-pressed or user-burned, are always full of errors - to perhaps a frightening degree. Fortunately, the writer adds two levels of error-correction data to be used later on to correct all of these errors. All DVD readers know about these two levels of error-correction data and apply it automatically to transparently repair the raw data during the reading process.
What the CDSpeed “Disc Quality” scan gives you is the ability to view these errors graphically as they are scanned back from the disc. The top graph shows you all of the errors as they are read back from the disc without any error -correction data yet applied. The bottom graph shows you the remaining errors after the first level of error correction data has been applied.
Note that CDSpeed doesn’t attempt to graph the errors that might remain after the second level of error correction is applied - since a properly burned disc [B]must[/B] have zero errors remaining at this point, or it’s considered to be a “coaster”. If errors are still encountered after the second (and also the “last-chance”) level of error-correction data is applied, then CDSpeed will merely count them in the “PO failures” count (located along the bottom of the CDSpeed window). Needless to say, “PO failures” should always show a count of zero.
So if you want to compare your discs to see which ones have the better error-rate, try doing a “Disc Quality” scan from within CDSpeed.
PS - If you already know about all of this CDSpeed stuff, I apologize for providing useless information; however, perhaps some other users browsing this forum might find it useful.