第二个句子正确,宾语从句已经将重点强调部分(本句中的what servers)前置了,其余部分用陈述句语序,这个是语法规定,对于这个语法点时间久了语感强了自然就掌握了,类似的句子还有：
Mother eagered to know how many bottles of beer Tom would buy after work.
Before revolution,people could never imagine how fast the society develops.