Re: the customer is always wrong
I run an Atom D510 as a "micro" server. I found the problem to be the bandwidth bottleneck of the CPU/Motherboard combo.
For me, it peaks at about 180* Mb/s through any combination of ports (Ethernet; built-in SATA; RAID card on PCI-E; PCI card on PCI). Now while that may seem plentyful, certain combinations were even slower (PCI --> PCI-E).
While the specific number is probably a motherboard limitation, the limited cpu bandwidth (in the form of PCI-E lanes) and associated motherboard support is probably the problem. This issues does not appear to be addressed in this new generation cpus.
* - To those noting that the gigabit is only capable of about 120 Mb/s anyway, I'd like to point out that the maximum network throughput when reading from disk for me was just shy of 80 Mb/s, and the 180 Mb/s figure was from SATA to PCI-E RAID. Meanwhile, network card was perfectly capable to read to and from RAM at close to 100 Mb/s.