Tech Support Forum - View Single Post - P4C800-E PCI-CSA bridge not recognized

**clintfan** · 03-08-2005, 09:51 PM

It is very dangerous to flash the wrong BIOS. Even what you did to try flashing non-E BIOS was a mistake unless you're sure that's what you've got. You may not have a P4C800 series mobo after all. In that case you should be using BIOS for the model you have, and this could also explain the nonworking LAN. We need to keep studying...

First, you say under the AGP slot you found a 3Com Marvell chip. Check the chip again; do the small numbers say M 88E8001 or something close to that, or do that say something more like Marvell 940? I'm afraid I'll have to ask you to really get in there and read those first few little numbers.
How far apart is the AGP slot from the PCI slot number 1? Is it the same spacing as PCI2 to PCI3, or is it twice the spacing?
Where is the square ATX12V connector? Is it just to the upper left of a DIMM slot, or is it to the lower left of the CPU carrier, behind the LAN jack?
Where is the PRI_RAID IDE connector? Is it horizontal on the board near the bottom right, or is it haning off the side of the front edge of the mobo?

If your LAN chip is the 940, the AGP slot spacing is the same as the other PCI slots, the ATX12V is up by the DIMM, and the PRI_RAID IDE connector is off the side of the board, I think you probably have the P4C800 Deluxe (non-E). Your Northbridge heatsink may also be mounted in a diamond orientation. This is likely the mobo that you have. In that case you need to use the BIOS P4C81019.ROM which is available from the download page. Be sure to use the latest AFUDOS v2.11 to install this; never use EZ Flash for updates, only for factory-level reload. Reference BIOS update instructions may be found in my article here, it is a bit dated but still good for your model. Afterward assuming you are using Windows XP, you will need the 3COM driver version 46 (Taiwan link); latest version 46 has it combined for all O/S's.

If your LAN chip is the 88E8001, the AGP slot is spaced wide, the ATX12V is to the lower left of the CPU, and the PRI_RAID IDE connector is horizontal, I think you probably have P4P800-E Deluxe. Your Northbridge heatsink may be mounted in a square orientation (parallel to the four sides of the mobo). In that case you need the BIOS and driver for that model. Websites went down, sorry I can't post links right now.

You said your LAN chip under the AGP slot isn't the Intel 82547Ei, so there's no way your mobo is P4C800-E Deluxe. So we won't tlak about that model anymore. But you should still check that chip number, so we can eliminate this for sure. Most of the rest of the qualities of this board are the same as the non-E, except the heatsink is in the square orientation.

I should also mention there is a very small but nonzero chance you have the P4C800-E Deluxe but they mounted the wrong LAN chip; this would also explain why the LAN isn't working. I hate to say this but I think we've seen boards before that have the wrong chips or are mismarked. Asus warns there are also some counterfeit boards out there.

Let me know the answers to the above points, so we can figure out which mobo you probably have, and wrap this up and maybe get your LAN working.

-clintfan

03-08-2005, 09:51 PM	#9 (permalink)
clintfan Guru Join Date: Sep 2003 Location: Silicon Valley, CA Posts: 2,655 OS: XP Pro	It is very dangerous to flash the wrong BIOS. Even what you did to try flashing non-E BIOS was a mistake unless you're sure that's what you've got. You may not have a P4C800 series mobo after all. In that case you should be using BIOS for the model you have, and this could also explain the nonworking LAN. We need to keep studying... First, you say under the AGP slot you found a 3Com Marvell chip. Check the chip again; do the small numbers say M 88E8001 or something close to that, or do that say something more like Marvell 940? I'm afraid I'll have to ask you to really get in there and read those first few little numbers. How far apart is the AGP slot from the PCI slot number 1? Is it the same spacing as PCI2 to PCI3, or is it twice the spacing? Where is the square ATX12V connector? Is it just to the upper left of a DIMM slot, or is it to the lower left of the CPU carrier, behind the LAN jack? Where is the PRI_RAID IDE connector? Is it horizontal on the board near the bottom right, or is it haning off the side of the front edge of the mobo? If your LAN chip is the 940, the AGP slot spacing is the same as the other PCI slots, the ATX12V is up by the DIMM, and the PRI_RAID IDE connector is off the side of the board, I think you probably have the P4C800 Deluxe (non-E). Your Northbridge heatsink may also be mounted in a diamond orientation. This is likely the mobo that you have. In that case you need to use the BIOS P4C81019.ROM which is available from the download page. Be sure to use the latest AFUDOS v2.11 to install this; never use EZ Flash for updates, only for factory-level reload. Reference BIOS update instructions may be found in my article here, it is a bit dated but still good for your model. Afterward assuming you are using Windows XP, you will need the 3COM driver version 46 (Taiwan link); latest version 46 has it combined for all O/S's. If your LAN chip is the 88E8001, the AGP slot is spaced wide, the ATX12V is to the lower left of the CPU, and the PRI_RAID IDE connector is horizontal, I think you probably have P4P800-E Deluxe. Your Northbridge heatsink may be mounted in a square orientation (parallel to the four sides of the mobo). In that case you need the BIOS and driver for that model. Websites went down, sorry I can't post links right now. You said your LAN chip under the AGP slot isn't the Intel 82547Ei, so there's no way your mobo is P4C800-E Deluxe. So we won't tlak about that model anymore. But you should still check that chip number, so we can eliminate this for sure. Most of the rest of the qualities of this board are the same as the non-E, except the heatsink is in the square orientation. I should also mention there is a very small but nonzero chance you have the P4C800-E Deluxe but they mounted the wrong LAN chip; this would also explain why the LAN isn't working. I hate to say this but I think we've seen boards before that have the wrong chips or are mismarked. Asus warns there are also some counterfeit boards out there. Let me know the answers to the above points, so we can figure out which mobo you probably have, and wrap this up and maybe get your LAN working. -clintfan Last edited by clintfan; 03-09-2005 at 12:35 AM.