D820 Vista system stuttering when sending data

Not sure how I find out, but here's the package I downloaded from the site.

R140623.EXE

Intel Mobile Chipset Driver Release Title: Chip Set: Intel Mobile Chipset, Driver, Windows Vista 32-bit, Windows Vista 64-bit, Multi Language, Multi System, v.8.1.1.1010, A01 Release Date: 1/22/2007 Criticality: Optional Description: The Intel(R) Chipset Software Installation Utility installs Windows* INF files to the target system. These files outline to the operating system how to configure the Intel(R) chipset components in order to ensure that the following features function properly: - Core PCI and ISAPNP Services - PCIe Support - IDE/ATA33/ATA66/ATA100 Storage Support - SATA Storage Support - USB Support - Identification of Intel(R) Chipset Components in the Device Manager

Something else to add to the mix here, I just noticed that when I do any kind of activity that really thrashes the hard drive, it will stutter the computer, mouse, music playback, everything.  I didn't have this problem when I had XP installed on this machine.

Have you defragmented the hard drive recently?  How much free space does it have on there?

Also, just tried it out of the dock and still having the same problem.  So it's not the dock, not USB, unless the NIC is connected to the motherboard via USB.  I'll have to find the whitepaper on this thing.

I have defragged.  I still have 38.6 GB free of 100 GB total.
Also, I just talked with Dell support and they first wanted to replace my hard drive (mute since it worked fine with XP), and then wanted me to reimage.  Well I just put Vista back on about a month ago after being on XP for 3 months.  So I don't think that will make any difference, and when I had Vista on to begin with I had this issue.  I really don't think it's hardware related other than a driver issue, but what driver and what device is causing the problem?  It's only output, not input.  I can download till I'm blue in the face, but uploading or USB output is where I have the problem.

Anyone else have any suggestions?  I can't find anything.

I think I may have figured it out.  I changed my Broadcom NIC from 100/Full to Auto and that seems to be doing the trick.  Stupid because our network here is set to 100/Half and I asked the network guy about it and he said just force your NIC to 100/Full.  Well works fine in XP, but not in Vista.  Any comments?

Nope, that didn't fix it either.  ARGH!  It's weird cause it doesn't send data the way XP did.  XP seemed to stream the data, but with Vista, it seems to pause, then send, then pause, then send...  And my system stutters when it's sending the data.  What the heck is going on?!

Ok, this is weird.  If I do a robocopy with /Z (backup mode) then it copies like it did in XP, good work around for now.  So I'm guessing this will not be fixed until SP1 comes out cause I read a blog from Mark Russinovich stating there is a problem with copying and SP1 will fix it (throughput buffer algorithm problem).