Probably the noobest question! Hash rates

[Nieko]

Hi there,

I am new to these forums and probably coming up with the biggest noob question there is, but any help would be greatly appreciated.

How are these hash rates calculated, the reason I ask is products seem to all be advertised differently on their rates which is confusing me.

For example, I have just purchased and R-box Rockminer 32-37GH/S, CGminer states this with WU 490+- 10% and hashing at around 38ish GH/S, when I log into my mining pool it claims I am mining at av 12.8k Mhash/s, I don't understand how this computes. Also I see that Gawminer advertise products such as the black widow being 13MH+. Is this 13,000,000 hashes per second or am I wrong. How does this convert to say, the Rockminers advertised 32-37GH/S speed?

I understand this is a noob question, but was hoping someone could help clarify a few things as I am trying to work out a best hash per $, and either the Black widow seems like pretty good bang for buck, being a sup $500 product.

Thank you!

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[xstr8guy]

It seems you're comparing Scrypt ASICs and SHA-256 (Bitcoin) ASICs. Scrypt is a different algorithm and can't hash bitcoin.

Try a running your R-box at a different bitcoin pool. You ARE hashing at a bitcoin pool with it, aren't you? Lol.

[lowbander80]

Scrypt and Sha different algorithms

first one counts in Mhash (at least for few more months) the other in Giga hash (at least for few months)

Be patient for few minutes in your pool and better try Ghash for quick comparison as other pools are slower in showing your results, then when you are done with the testing choose your favorite pool