USB Bandwidth Problems???

**Altimat** · 02-10-2004, 09:43 PM

I installed my MP3+ on my laptop today, and I get choppy playback with popping, periods of silence, etc. Performing any other tasks on the laptop exacerbates the problem. Is this a limitation of the hardware, or of USB in general? How can one possibly have up to 127 USB devices if this one device is taxing the USB bandwidth? My DVD plays fine (audio and video). Could it be the hard drive is not accessing the data fast enough??? I checked for HDD DMA and there is no option to enable/disable it. Only write-caching (is enabled). Help!!

I'm ready to Ebay this thing and get a shuttle or something!

**frodobaggins** · 02-10-2004, 11:25 PM

If you are using xp the dma setting is not on the hard drives in device manager. It is on the ide controllers settings.

**Altimat** · 02-10-2004, 11:42 PM

Selected "DMA if available", and apparently its not. Secondary IDE is set to DMA, is using DMA, so tried a CD, no difference.

Sounds good between pops though!

**frodobaggins** · 02-10-2004, 11:55 PM

bummer dude

**Altimat** · 02-11-2004, 12:12 AM

Lmao!

**lerandell** · 04-19-2004, 09:58 AM

I just bought an mp3+ and I am having the same problem. I am thinking it is a USB version problem. everything is USB 2.0 compatable but the root hub on the laptop. I am going to try a different laptop that has a 2.0 root hub

**Pokey** · 04-19-2004, 10:30 AM

If you are overtaxing a USB port because of a BW problem, windows will come back and say that "you're exceeding the BW for that port." The Way you handle BW problems is by adding another usb card. In order to get what USB claims is by adding additional cards. All i can get out of one card is two webcams in general. At my house i have 5 webcam outside, which breaks down to 2 cams per card (@ 2 cards) and one cam on the motherboard with a usb mouse and keyboard. You can add as many cards as you have slots.

Here are some things to try to fix your problem, first reboot your system and go into BIOS, usally you'll have a option to "let OS handle the USB" or " the BIOS to handle USB" (or something in that term), if you're running XP, choose OS to handle. Then after you have that in BIOS configured, reboot and start up in safe mode, go into device manager and remove all the USB controllers, devices, etc.. Then reboot. XP will arrange the USB automaticly and all should work.
Good Luck

**Altimat** · 04-19-2004, 06:20 PM

FWIW I returned the MP3+ after researching it further and learning that its simply a USB bandwidth hog. I now have a PC with one USB 2.0 Card dedicated to USB DVD playback, and the MoBo USB for the GPS etc. just to be safe. Sold the laptop. USB was too important to my system to risk any more USB problems from the laptop.