Newbie question - What is the conversion factor to go from GH/s to MHash/sec?

[Jordz]

As subject line above read, looking at some units which are rated at GH/s and would like to know what they work out in the more popular MHash/sec.

If they are not measurements of the same output I'd appreciate an explanation of that GH/s is.

Thanks in advance (again...)

[drakahn]

k= Kilo = 1000
M = Mega = k*1000 = 1000000
G = Giga = M*1000 = 1000000000

[Inaba]

Move the decimal place over 3 spots to convert.

[Stephen Gornick]

As subject line above read, looking at some units which are rated at GH/s and would like to know what they work out in the more popular MHash/sec.

All GPUs are under 1,000 Mhash/s (for bitcoin mining) so the unit for describing their performance is in Mhash/s.
There are FPGA units which perform at better than 1,000 Mhash/s so their performance might be rated in terms of Ghash/s.  1 Ghash/s = 1,000 Mhash/s.
ASICs also are above 1,000 Mhash/s (well above) so they too are rated in terms of Ghash/s as well.

Now this is just for Bitcoin mining.  Other alternative crypto currencies might use a different algorithm and thus a card that performs a certain level for Bitcoin mining can have a completely different rating for the alt chain mining.  Litecoin, for instance, uses the Scrypt algorithm.  So an AMD 5970 that might do 700 Mhash/s when mining Bitcoin might do under 100 10 [Edited] Mhash when mining Litecoin.  The difference would be on a per-model basis versus there being a simple X:Y ratio for comparing how one model might perform versus another.

[RyNinDaCleM]

As subject line above read, looking at some units which are rated at GH/s and would like to know what they work out in the more popular MHash/sec.

All GPUs are under 1,000 Mhash/s (for bitcoin mining) so the unit for describing their performance is in Mhash/s.
There are FPGA units which perform at better than 1,000 Mhash/s so their performance might be rated in terms of Ghash/s.  1 Ghash/s = 1,000 Mhash/s.
ASICs also are above 1,000 Mhash/s (well above) so they too are rated in terms of Ghash/s as well.

Now this is just for Bitcoin mining.  Other alternative crypto currencies might use a different algorithm and thus a card that performs a certain level for Bitcoin mining can have a completely different rating for the alt chain mining.  Litecoin, for instance, uses the Scrypt algorithm.  So an AMD 5970 that might do 700 Mhash/s when mining Bitcoin might do under 100 Mhash when mining Litecoin.  The difference would be on a per-model basis versus there being a simple X:Y ratio for comparing how one model might perform versus another.

This is correct, except in actuality, a 1Gh/s Bitcoin miner will do around 1Mh/s in Litecoin

[dree12]

The units are GHz ⋅ (2 SHA256) for Gh/s in a Bitcoin context. It effectively means one billion Bitcoin hashes per second. Because MHz ⋅ (2 SHA256) is exactly 1000th of that, the conversion factor is 1000.