Quote from: zimmah on November 30, 2013, 03:20:12 PM

CPUs usually measure in the kilohashes (thousands of hashes per second)
GPUs and FGPAs usually measure in the mega hashes (millions of hashes per second)
ASICS usually measure in GIGA hashes, Third generation ASICs measure in Terrahashes sometimes
The global hashrate is still measured in Terrahashes but should officially be measured in Peta hashes by now. They'll probably reach Exa hashes by next year. (1 Exa = 1 000 Peta)

Note: Above numbers are for mining coins using SHA256 hashes (Bitcoin, PPC, Namecoin, etc.)

For coins using Scrypt hashes (Litecoins & co) the numbers are quite different:

CPUs: kilohashes/s - between a few k/s up to a few dozens of k/s for the most high range CPUs. A hundred of kh/s possible on really big servers with lots of cores.
GPUs: kilohashes/s, still - between a dozen kh/s for embed/laptop/small business desktop, all the way up to several hundreds of kh/s for high range gaming rigs with powerful card. Note though that Nvidia are notoriously bad at the kind of math (integer and logical bit operation) used in hashing, AMD are mutch better.
ASIC: none in productions yet. Again, don't expect jumps in performance as huge as with SHA256 - Scrypt uses memory and on a Scrypt ASIC a lot of the space will be used by the embed memory and thus wasted/not used by the Samba cores. You will probably see first more success with general purpose many-core chips that have lots of small lightweight cores, each with its own memory buffer. (Like Parallella boards) before Scrypt ASICS.

Also note that other hashes exist (Yacoin and Quark use various variants of SHA-3, or SHA-3 candidates. They should operate somewhat in between. But I don't have numbers for CPU and GPU for them).

Also note that Primecoins and co operate on a completely different way (they search for chains of prime numbers of specific length, instead of hashes of specific difficulties).
CPU give you usually hundreds to thousande primes per second. GPU aren't really functionnal and stable yet.