Burn Speed is at 1x with a Plextor PX-708UF



I just got an external USB Plextor PX-708UF and having trouble buring DVD at higher speed than 1x.

I read through several of the other threads and have verified that both the Primary and Secondary IDE channels are running in “Ultr DMA Mode”. I have tried to use Imation 4x DVD+RW and Memorex 4x DVD-R Media and for both CDVDInfo shows that the driver write speed can support up to 4.x.

I am using an IBM Thinkpad T40 with Windows 2000 Pro, 600 MegHZ cpu, and 1G memory.

Any thoughs/suggestions are much appreciated, I am in serious help as it taking me more than an hour to burn a DVD at this moment. Thank you


Does the Thinkpad T40 have USB1.1 or USB2.0 ports? 600MHz CPU sounds a bit too low for a modern system like a T40, unless the Pentium-M is just clocked down to that speed for power saving.


The ThinkPad has 2 USB 2.0 Ports. Thank you


I just verified that the cpu is running at 1.6 Gbyte.


Everything seems to be in order; any idea what the rotational speed on your notebook HDD is? Even if it’s 4200RPM, that should be fast enough to feed the burner at 4x. Do you have any other systems to test the drive on? What Service Pack level is your Win2K installation running?


There is no need to check the DMA properties since your drive is an external one and thus, it’s not attached to your IDE channels. DMA doesn’t come into play with external drives, only the USB/FireWire ports. If you can, fire up PlexTools and do a transfer rate test and post your results here. You can also use Nero CD-DVD Speed for this but then you will waste a disc (PlexTools can do simulated burns). During yourburn session, do you notice the drive’s buffer draining? This is a good indication that data is not transferred fast enough. Let us know!

Welcome to the forums :wink:


:bow: I should have warned at first I guess that I am new to this and I want to thank you again for your help.

The Specs for the HardDrive is 5400 RPM but I am not sure os way to measure, do you have a suggestion or a cool tool.

I came to find that the Plextor 708 does no longer ship the Plextool and the one I downloaded is an upgrade and require to install on top the orginal. It looks like there are some registry entries you can update but I can’t find what they are.

'The Driver buffer draining", again can you help me understand how I can measure that? where is this configure?

Works on XP, yesterday’s experiment: I have another 20G HD which has windows XP so I swapped HDs and I was able to burn at 4x after installing the USB 2.0 driver and the XP Plextor Driver that came with the Burner .

The Plextor website says that the driver that comes with the Windows2000 pro CD is good enough but I am wondering now it is a driver problem. Thanks


Windows 2000 isn’t USB2.0 aware unless you install Service Pack 4. Any Service Pack level lower and it will treat USB2.0 ports as USB1.1 ports.


You can’t measure this one, but, during the burn session with your burn software you will see some information on “drive buffer” or something similar. This buffer should remain full (read: between 90 and 100%). If it’s constantly going down to 0% then this indicates that data is not delivered fast enough to the drive. I don’t know which software you use for burning your discs. Not all applications have information on buffers.


I have a feeling that this a Driver problem. To Me, Windows seems to install a Generic DVD drive and is not picking the proper USB 2.0 Driver. I have verifed that the windows 2000 pro machines has SP4 , I also installed the latest USB 2.0 driver from the IBM Site. However, if I go to the Plextor Site to get the Windows 2000 Driver, they indicate that the WIn OS come with the required driver. I serach the Win 2000 Server and Profession OS CDs but can’t find another driver than one installed. Do you know if I can use the Win XP driver on Win 2000 OS.

I noticed that every time I plug the Plextor device, I am getting an Information message in the Event Viewer that indicates:

Received a device interface REMOVAL notification for device:

IN the system Info, I see under Probelm Devices:

[Problem Devices]
Device PNP Device ID Error Code
Bluetooth LAN Access Server Driver ROOT\NET\0000 22

Under the USB Section of the System Info, Eventhough I have “DBM USB2 Enhanced Host Controller” installed, the USB Mass Storage Device is created:

Device PNP Device ID
Intel® 82801DB/DBM USB Universal Host Controller - 24C2 PCI\VEN_8086&DEV_24C2&SUBSYS_052D1014&REV_01\3&61AAA01&0&E8
USB Root Hub USB\ROOT_HUB\4&30397EF5&1
Intel® 82801DB/DBM USB Universal Host Controller - 24C4 PCI\VEN_8086&DEV_24C4&SUBSYS_052D1014&REV_01\3&61AAA01&0&E9
USB Mass Storage Device USB\VID_093B&PID_0041\0041203A51
Intel® 82801DB/DBM USB Universal Host Controller - 24C7 PCI\VEN_8086&DEV_24C7&SUBSYS_052D1014&REV_01\3&61AAA01&0&EA
USB Root Hub USB\ROOT_HUB\4&17611003&1
Intel® 82801DB/DBM USB2 Enhanced Host Controller - 24CD PCI\VEN_8086&DEV_24CD&SUBSYS_052E1014&REV_01\3&61AAA01&0&EF


as far as I remember your controller should be running in usb2.0 mode because it reads enhanced host controller. Do you have an usb memory stick at hand to test if the ports are really working in usb2.0 mode? You can see it easily if the transfer speeds exceed 1,5 MB/s it is usb2.0.