CPU-wise I would say it will be fine.
However I would not want to use Realtek NICs in my home gateway personally, as I have found them to be less than satisfactory.
I would look for a 1GHz Via mobo on eBay and pair it with a dual port Intel Pro/1000MT or similar in the PCI slot for a much more reliable gateway (assuming you only need 2NICs - for a third you could use the onboard NIC, which is often a Via chipset 10/100 NIC on the older models, or get the quad port NIC, but these are more expensive).
If you are really bothered about noise & power I assume this is for home use - so the lower clocked Via chips should be sufficient. I don't run Astaro though so you should check yourself first...
However I would not want to use Realtek NICs in my home gateway personally, as I have found them to be less than satisfactory.
I would look for a 1GHz Via mobo on eBay and pair it with a dual port Intel Pro/1000MT or similar in the PCI slot for a much more reliable gateway (assuming you only need 2NICs - for a third you could use the onboard NIC, which is often a Via chipset 10/100 NIC on the older models, or get the quad port NIC, but these are more expensive).
If you are really bothered about noise & power I assume this is for home use - so the lower clocked Via chips should be sufficient. I don't run Astaro though so you should check yourself first...
