when the card is still alive:  ethtool eth0
Settings for eth0:
	Supported ports: [ TP ]
	Supported link modes:   10baseT/Half 10baseT/Full
	                        100baseT/Half 100baseT/Full
	                        1000baseT/Full
	Supports auto-negotiation: Yes
	Advertised link modes:  10baseT/Half 10baseT/Full
	                        100baseT/Half 100baseT/Full
	                        1000baseT/Full
	Advertised pause frame use: No
	Advertised auto-negotiation: Yes
	Link partner advertised link modes:  Not reported
	Link partner advertised pause frame use: No
	Link partner advertised auto-negotiation: No
	Speed: 10Mb/s
	Duplex: Half
	Port: Twisted Pair
	PHYAD: 1
	Transceiver: internal
	Auto-negotiation: on
	MDI-X: off
	Supports Wake-on: pumbag
	Wake-on: g
	Current message level: 0x00000001 (1)
	Link detected: yes

ethtool -t eth0
The test result is PASS
The test extra info:
Register test  (offline)	 0
Eeprom test    (offline)	 0
Interrupt test (offline)	 0
Loopback test  (offline)	 0
Link test   (on/offline)	 0

ethtool -d eth0
MAC Registers
-------------
0x00000: CTRL (Device control register)  0x00100248
      Endian mode (buffers):             little
      Link reset:                        reset
      Set link up:                       1
      Invert Loss-Of-Signal:             no
      Receive flow control:              disabled
      Transmit flow control:             disabled
      VLAN mode:                         disabled
      Auto speed detect:                 disabled
      Speed select:                      1000Mb/s
      Force speed:                       no
      Force duplex:                      no
0x00008: STATUS (Device status register) 0x00080702
      Duplex:                            half
      Link up:                           link config
      TBI mode:                          disabled
      Link speed:                        10Mb/s
      Bus type:                          PCI
      Bus speed:                         33MHz
      Bus width:                         32-bit
0x00100: RCTL (Receive control register) 0x04048002
      Receiver:                          enabled
      Store bad packets:                 disabled
      Unicast promiscuous:               disabled
      Multicast promiscuous:             disabled
      Long packet:                       disabled
      Descriptor minimum threshold size: 1/2
      Broadcast accept mode:             accept
      VLAN filter:                       enabled
      Canonical form indicator:          disabled
      Discard pause frames:              filtered
      Pass MAC control frames:           don't pass
      Receive buffer size:               2048
0x02808: RDLEN (Receive desc length)     0x00001000
0x02810: RDH   (Receive desc head)       0x00000037
0x02818: RDT   (Receive desc tail)       0x00000035
0x02820: RDTR  (Receive delay timer)     0x00000000
0x00400: TCTL (Transmit ctrl register)   0x3103F0FA
      Transmitter:                       enabled
      Pad short packets:                 enabled
      Software XOFF Transmission:        disabled
      Re-transmit on late collision:     enabled
0x03808: TDLEN (Transmit desc length)    0x00001000
0x03810: TDH   (Transmit desc head)      0x000000D3
0x03818: TDT   (Transmit desc tail)      0x000000D3
0x03820: TIDV  (Transmit delay timer)    0x00000008
PHY type:                                unknown

===========================================================
when the card is dead:


MAC Registers
-------------
0x00000: CTRL (Device control register)  0xFFFFFFFF
      Endian mode (buffers):             big
      Link reset:                        reset
      Set link up:                       1
      Invert Loss-Of-Signal:             yes
      Receive flow control:              enabled
      Transmit flow control:             enabled
      VLAN mode:                         enabled
      Auto speed detect:                 enabled
      Speed select:                      not used
      Force speed:                       yes
      Force duplex:                      yes
0x00008: STATUS (Device status register) 0xFFFFFFFF
      Duplex:                            full
      Link up:                           link config
      TBI mode:                          enabled
      Link speed:                        not used
      Bus type:                          PCI-X
      Bus speed:                         133MHz
      Bus width:                         64-bit
0x00100: RCTL (Receive control register) 0xFFFFFFFF
      Receiver:                          enabled
      Store bad packets:                 enabled
      Unicast promiscuous:               enabled
      Multicast promiscuous:             enabled
      Long packet:                       enabled
      Descriptor minimum threshold size: reserved
      Broadcast accept mode:             accept
      VLAN filter:                       enabled
      Canonical form indicator:          enabled
      Discard pause frames:              ignored
      Pass MAC control frames:           pass
      Receive buffer size:               4096
0x02808: RDLEN (Receive desc length)     0xFFFFFFFF
0x02810: RDH   (Receive desc head)       0xFFFFFFFF
0x02818: RDT   (Receive desc tail)       0xFFFFFFFF
0x02820: RDTR  (Receive delay timer)     0xFFFFFFFF
0x00400: TCTL (Transmit ctrl register)   0xFFFFFFFF
      Transmitter:                       enabled
      Pad short packets:                 enabled
      Software XOFF Transmission:        enabled
      Re-transmit on late collision:     enabled
0x03808: TDLEN (Transmit desc length)    0xFFFFFFFF
0x03810: TDH   (Transmit desc head)      0xFFFFFFFF
0x03818: TDT   (Transmit desc tail)      0xFFFFFFFF
0x03820: TIDV  (Transmit delay timer)    0xFFFFFFFF
PHY type:                                unknown