- Joined
- Feb 14, 2005
- Location
- California
Okay, this is driving me crazy. I hope there's a USB expert here and/or someone that has seen this problem and knows how to fix it. I'm posting this as my last attempt to fix it. If I can't with help here, I'm gonna get a USB 2.0 PCI card and hope that does the job.
Anyway, I have an Asus P4T533-C with USB 2.0 onboard (NEC chipset). I have XP Pro with SP2 and all the proper drivers loaded for USB 2.0. Device Manager shows it as an "enhanced" controller. I have an iwin memory card reader that is USB 2.0 connected to the internal header and a VEO Velocity Connect USB 2.0 web cam connected to the external connection. I have a WD USB 2.0/firewire external 250G drive that when connected to firewire gives me a transfer speed of 39MB/s. When connected to the USB 2.0 port, it give me 15.9MB/s transfer. If I disconnect the web cam, the transfer rate goes up to 17.2MB/s. If I also disconnect the card reader, the transfer goes up to 19.8MB/s. That's the highest transfer rate I can get when it's the only USB 2.0 device. I also have tried another external USB 2.0 with a WD 320G drive and the numbers are the same.
I know I'm running in the USB 2.0 range as 19.8MB/s is only possible with USB 2.0, but is still slower than what I should be getting. Firewire gives me twice the transfer speed. I've tried everything I can think of to fix it (different drivers, caching, etc.). Starting to wonder if it's a bad implementation of the NEC USB 2.0 chipset on the MB by Asus. I'm thinking about disabling the onboard and getting an Adaptec PCI controller. Before I do that I wanted to see if there are any thoughts or suggestions here.
Thanks!
Anyway, I have an Asus P4T533-C with USB 2.0 onboard (NEC chipset). I have XP Pro with SP2 and all the proper drivers loaded for USB 2.0. Device Manager shows it as an "enhanced" controller. I have an iwin memory card reader that is USB 2.0 connected to the internal header and a VEO Velocity Connect USB 2.0 web cam connected to the external connection. I have a WD USB 2.0/firewire external 250G drive that when connected to firewire gives me a transfer speed of 39MB/s. When connected to the USB 2.0 port, it give me 15.9MB/s transfer. If I disconnect the web cam, the transfer rate goes up to 17.2MB/s. If I also disconnect the card reader, the transfer goes up to 19.8MB/s. That's the highest transfer rate I can get when it's the only USB 2.0 device. I also have tried another external USB 2.0 with a WD 320G drive and the numbers are the same.
I know I'm running in the USB 2.0 range as 19.8MB/s is only possible with USB 2.0, but is still slower than what I should be getting. Firewire gives me twice the transfer speed. I've tried everything I can think of to fix it (different drivers, caching, etc.). Starting to wonder if it's a bad implementation of the NEC USB 2.0 chipset on the MB by Asus. I'm thinking about disabling the onboard and getting an Adaptec PCI controller. Before I do that I wanted to see if there are any thoughts or suggestions here.
Thanks!