Why is bitcoin difficulty so different from litecoin

vitruvio

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Quote from: 420 on November 14, 2012, 04:02:20 PM

Quote from: vitruvio on November 14, 2012, 09:41:31 AM

Quote from: 420 on November 13, 2012, 09:03:20 PM

Fantastic! don't see a donation address for you

Maybe I do things not waiting a reward, then why have an address in my signature? Wink

for the option of reward. its all voluntary

Voluntary is to donate and voluntary is to receive Wink

. I think if I set my address in my signature I'm a kind of mercenary, I only help waiting a bounty. Not my way.

Regards

420

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Quote from: vitruvio on November 14, 2012, 09:41:31 AM

Quote from: 420 on November 13, 2012, 09:03:20 PM

Fantastic! don't see a donation address for you

Maybe I do things not waiting a reward, then why have an address in my signature? Wink

for the option of reward. its all voluntary

vitruvio

sr. member

Activity: 850

Merit: 331

Quote from: 420 on November 13, 2012, 09:03:20 PM

Fantastic! don't see a donation address for you

Maybe I do things not waiting a reward, then why have an address in my signature? Wink

420

hero member

Activity: 756

Merit: 500

Quote from: vitruvio on November 13, 2012, 04:53:50 PM

The calculation to get the difficulty is the same in LTC and BTC, there is only one difference, LTC diff is calculated to get a block every 2,5 minutes (150 seconds) and BTC is for 10 minutes (600 seconds).

To get diff : Get average Network hashrate of the last 2016 blocks (aprox):

BTC : 23644.89936 Gh/s --> 23,644,899,360,000 h/s
LTC : 598.55 Mh/s --> 598,550,000 h/s

Diff =(hashrate/s * avg_time_to_get_a_block)/2^32

BTC_Diff= (23,644,899,360,000*600)/4,294,967,296=3303154.282

LTC_Dif = (598,550,000*150)/4,294,967,296=20.90411726

So the fact that GPU get +- same hash but in Kilo instead of Megas doesn't matter, it is only a effect of the algorithm choosen, the value taken is hashes per second in both cases.

More clear if anytime LTC network hashrate would be the same than BTC, the LTC diff will be 1/4 of the BTC diff.

Regards

Fantastic! don't see a donation address for you

vitruvio

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Activity: 850

Merit: 331

The calculation to get the difficulty is the same in LTC and BTC, there is only one difference, LTC diff is calculated to get a block every 2,5 minutes (150 seconds) and BTC is for 10 minutes (600 seconds).

To get diff : Get average Network hashrate of the last 2016 blocks (aprox):

BTC : 23644.89936 Gh/s --> 23,644,899,360,000 h/s
LTC : 598.55 Mh/s --> 598,550,000 h/s

Diff =(hashrate/s * avg_time_to_get_a_block)/2^32

BTC_Diff= (23,644,899,360,000*600)/4,294,967,296=3303154.282

LTC_Dif = (598,550,000*150)/4,294,967,296=20.90411726

So the fact that GPU get +- same hash but in Kilo instead of Megas doesn't matter, it is only a effect of the algorithm choosen, the value taken is hashes per second in both cases.

More clear if anytime LTC network hashrate would be the same than BTC, the LTC diff will be 1/4 of the BTC diff.

Regards

420

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Merit: 500

well i made the calculation that its about 1,000 factor less for litecoin hashrate for about the same amount of hardware

pyra-proxy

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2 reasons come off quickly and easily off the top of my head:

1) Fewer miners with some/many of these mining on lower hash rate hardware (CPU's)

2) SHA to Scrypt hash rate conversion --> 1 GPU may be able to get hundreds of MHash/s whereas the same hardware can not get that same rate mining scrypt

That explains a large part of the delta but the "good" news is that upon asic arrival in BTC I would thoroughly expect LTC mining to get a big boon from people who want to keep their rigs/mining gear and get more mining value for them instead of just shutting them off or selling the equipment away on ebay.

420

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Quote from: crazy_rabbit on November 13, 2012, 03:12:48 AM

I always thought they were just different things and thus couldn't really be compared directly without some sort of intermediary conversion like (How many 6950 GPUS could make that amount of LTC hash and then say okay well those GPUS' could do this many Bitcoin Hash). There is a lot of tweaking (different types) that make a difference in the hash rate in different ways. so I think the formula isn't as simple as 1/1000.

But what do I know. :-(

yeah you're crazy

but thanks

crazy_rabbit

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RUM AND CARROTS: A PIRATE LIFE FOR ME

I always thought they were just different things and thus couldn't really be compared directly without some sort of intermediary conversion like (How many 6950 GPUS could make that amount of LTC hash and then say okay well those GPUS' could do this many Bitcoin Hash). There is a lot of tweaking (different types) that make a difference in the hash rate in different ways. so I think the formula isn't as simple as 1/1000.

But what do I know. :-(

420

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Activity: 756

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Why is bitcoin difficulty in millions and litecoin difficulty in teens?

I can understand that bitcoin does mhash's (general hardware) and litecoin only does khash's (for example a 5970 gets 675 mhash for bitcoin mining but only 750 KHASH for litecoin)

so if network speed were comparable litecoin would be 28ghash? (1/1000) of bitcoin hash
so current diffuclty 18, network speed 640,000khash 28/.64 = 43.75
18 x 43.75 is only a difficulty of 787. still far short of 300,000......

Am I retarded?

Topic: Why is bitcoin difficulty so different from litecoin (Read 2025 times)