[Cyph0n]

Intel has a patent on a TRNG that has a throughput of 2 Gbps+. They published a paper on its operation in JSSC a while back [1]. It passes all NIST RNG tests and is PVT tolerant. Too bad it's patented...

[1]: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6...