Name-brand or white box? Here are some arguments for sticking with Tier 1 vendors for your enterprise servers.
Consistency of parts: Tier 1 vendors tend to use the same components inside units in the same order; second-tier vendors may switch motherboards or video cards midstream.
The price gap has narrowed.
Major software vendors are more likely to take responsibility for application glitches on name-brand servers that they've tested for compatibility.
Support for multiple OSs has advanced dramatically.
Second-tier motherboard manufacturers that don't have offices United States can't respond as quickly enough to problems.