No. What happened is that Intel introduced the
RdRand instruction in Ivy Bridge CPUs. A support for the instruction was added for FreeBSD 10. The initial implementation allowed you to switch the
/dev/random backend directly to RdRand by enabling the
hw.ivy_rng_enable sysctl (i.e.
/dev/random would give you raw
RdRand output) -- please note that FreeBSD 10 is still in development, so this implementation was not released in any official version. However, Intel did some design decision with
RdRand that leaves it open for doubt (e.g.:
http://blog.jim.com/crypto/rdrand.html). Therefore, the final FreeBSD 10 implementation removes the option to access
RdRand directly via
/dev/random and only uses it to feed additional entropy to the current
Yarrow PRNG (the entropy is currently harvested also from keyboard and mouse activity, network activity, hardware interrupts, ...).