Added 2nd NIC, now 1st NIC gone!?

This is a discussion about Added 2nd NIC, now 1st NIC gone!? in the Windows Networking category; Hello. I was using a 3COM905B in my Win2K machine without problems. I added a 2nd NIC (3COM900B) & started my machine. Now I only see the newer NIC (as Local Area Connection 2) & my original NIC (formerly Local Area Connection 1) is gone (not showing in network properties).

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Hello.
 
I was using a 3COM905B in my Win2K machine without problems. I added a 2nd NIC (3COM900B) & started my machine. Now I only see the newer NIC (as Local Area Connection 2) & my original NIC (formerly Local Area Connection 1) is gone (not showing in network properties).
 
What happened?

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Oct 24
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Damn, I feel real silly. I totally forgot I have a non-ACPI machine (changed it to Standard PC a long time ago). Problem solved

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In Win2K, you can change back and forth between ACPI support modes within the current installation. However, the success rate (from personal experience) has been really low. Actually, when I say "low", I really mean "zero". I would imagine that the problem centered around both NICs trying to use the same resources. Is this what happened?

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Quote:
In Win2K, you can change back and forth between ACPI support modes within the current installation. However, the success rate (from personal experience) has been really low. Actually, when I say "low", I really mean "zero". I would imagine that the problem centered around both NICs trying to use the same resources. Is this what happened?

Well, usually I install as Standard PC & most (sometimes all depending on #) of my adapters get their very own IRQ. Sometimes I notice an IRQ may get shared by 2 adapters, but this doesn't happen too often.

On this occasion, I reverted back to Standard PC from ACPI. Please keep in mind I had done this months ago & my machine has been rock stable. I forgot on rare occasion Windows tends to "lose" adapters upon initial installation when in non-ACPI mode (well, this happens on my setup(s) anyway). I have reverted from ACPI to Standard PC many times in the past & have never had any stability issues with either of my two current systems (ABIT BF6 & SUPERMICRO P6DGE). Admittedly, I have not tried going the Standard PC to ACPI route.

Call it a "brain fart", but I gave the second 3COM the same settings as the first NIC. Even so, I was perplexed as to why it was not visible in Device Manager or in the Network Properties. Regardless, I tried hitting "Scan for hardware changes", & my first NIC showed up. It was displayed as "Device not configured properly" (NOT IRQ error related). I gave it the proper LAN settings (192.168.0.1) instead of the ISP settings & all was well.