On EC2 there are two ways to get a dedicated machine:

- Using VPC you can specify that your instance should run on dedicated hardware [1]

- Cluster Compute instances [2] most likely (see [3]) run on dedicated hardware too

[1] http://aws.amazon.com/dedicated-instances/

[2] http://aws.amazon.com/ec2/#instance

[3] https://forums.aws.amazon.com/message.jspa?messageID=238197#...