SIOCSIFFLAGS: Cannot assign requested address

[T0M3K]

So I just got myself a used dual gigabit intel NIC.
Installed it via PCI bus on motherboard and was greeted by PXE-E05 which was fixed by updating firmware.
I disabled onboard NIC, and crossed my fingers.
My card failed to work. While at first was spitting SIOCSIFFLAGS: Cannot assign requested address all over, and didn't failed to start. I re-enabled internal NIC (which used e1000 also used by new NIC) just to get connected.
Manually assigning IP to either port results in SIOCSIFFLAGS: Cannot assign requested address
Here is what ifconfig told me:
eth0 Link encap:Ethernet HWaddr 00:19:d1:74:65:88
inet addr:192.168.5.15 Bcast:192.168.5.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7849 errors:0 dropped:0 overruns:0 frame:0
TX packets:6858 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:6968711 (6.6 MiB) TX bytes:970652 (947.9 KiB)

eth1 Link encap:Ethernet HWaddr ff:ff:0a:5f:8e:b6
inet addr:192.168.5.15 Bcast:192.168.5.255 Mask:255.255.255.0
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

eth2 Link encap:Ethernet HWaddr ff:ff:0a:5f:8e:b7
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:24 errors:0 dropped:0 overruns:0 frame:0
TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:11238 (10.9 KiB) TX bytes:11238 (10.9 KiB)

I'm stuck, anybody has ideas?
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[defenderBG]

if you tell me what address, or better which command you issued to get the error, I can tell you what your problem is.

from what I see from ifconfig - you have 2 cards (eth0 and eth1) with the same ip and netmask, which should not happen.

[T0M3K]

I have HP NC7170 network card with Intel Chipset 82546EB

Any command I try on any of its interfaces (could be ifconfig up 192.168.5.x) results in the same SIOCSIFFLAGS: Cannot assign requested address
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