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I have an Asus Sabertooth X79.

I often get corrupted files. I checked the RAM, but memtest finds no errors. To avoid the possibility of disk errors, I tried copying the files to tmpfs.

If I copy from the network, I get md5sum mismatches about once every 10 times using a 6Gb file. Copying from RAM to RAM, I didn't get mismatches.

I get a very high number of errors in ifconfig (compared to others PCs I just took as reference, which have 0 with much more traffic). Here is an example

RX packets:13972848 errors:200 dropped:0 overruns:0 frame:101

The motherboard is new, but do you think there're some problems with it? What could I use to test the (integrated) network adapter? What else do you think I should double check?

--edit--

I tried another NIC, it gives a lot of Corrupted MAC on Input. Disconnecting: Packet corrupt lost connection. I noticed that another PC downloads at 11.1MB/s without problems. This pc at 66.0 MB/s. Is there any way to try to limit the speed?

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3  
Might be better to ask this in Superuser of Server Fault? –  TheX Mar 18 '13 at 14:39
    
Try to plug the computer in another switch/hub port. Did you try replacing the UTP cable? This can be caused by bad RJ-45 connectors. Also check the metallic contacts of your motherboard's female RJ-45 connector. Rusty contacts may cause packet loss. –  Eric Carvalho Mar 18 '13 at 16:20
    
I tried another NIC, it gives a lot of Corrupted MAC on Input. Disconnecting: Packet corrupt lost connection. I noticed that another PC downloads at 11.1MB/s without problems. This pc at 66.0 MB/s. Is there any way to try to limit the speed? –  Fabio Dalla Libera Mar 18 '13 at 16:51
3  
~12MB/s means a connection speed of 100Mbps. Your PC is connected at 1Gbps, which is more sensible to electric interference and cable/connector quality. Try sudo ethtool -s eth0 speed 100 autoneg off to force a 100Mbps connection. –  Eric Carvalho Mar 18 '13 at 17:02
1  
I would check cables, and switches too. –  Braiam Apr 4 at 2:55

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