one of my PCs is lagging a bit during LAN file transfers

[alquix]

Hi
I have a gigabit network on a WRT610n with 3 attached PCs, all dual core processors with 2 gigs of ram and sata hard drives (I like to stay current). 2 of them can transfer large Gig+ files at around 80MB/s between each other, but my box that I use the most only transfers at 40-50MB/s
All cables are Cat5e. All OS's are Win 7 x64. cables have been swapped and have not shown to be the problem. The NIC on the problem PC is the Dynex gigabit PCI adapter from Best Buy. NIC drivers have been updated to latest Dynex and realtek releases, with no success on either.
I can usually work through issues, but this one has me stumped :X

 

[MadKing]

"Dynex gigabit PCI adapter."

You are limited by the PCI bus. The 2 others pc have probably PCIe bus.

 

[Agee]

Can your main PC's drive sustain that xfer rate? Test with this:
http://crystalmark.info/software/CrystalDiskMark/index-e.html

I used crappy NICs and had all sorts of problems until I grabbed some Intel PCI-e ones and updated all my discs to fast units.

Now, zero problems sustaining 80mb xfers to PCs.

 

[alquix]

thanks to the both of you. I just tried crystaldiskmark and it's showing 59 read, 54 write, so that plus the PCI bus limitations are surely holding my network back.
I appreciate the responses!

 

[Agee]

I've got a stack of these. GREAT drives, fast, quiet, cool and cheap!

http://www.newegg.com/Product/Product.aspx?Item=N82E16822152181