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Topic: Scrypt mining only on GPU's? Any FPGA or ASIC companies out there? (Read 2898 times)

kramble
sr. member
Activity: 384
Merit: 250
Scrypt mining only on GPU's? Any FPGA or ASIC companies out there?
October 17, 2013, 04:13:57 AM
#10
Quote from: skeeterskeeter on October 16, 2013, 08:27:20 PM
The implementation is just above me. I get parts of it, but overall I can't follow it through. It looks like it uses SHA-256 function? But I also read that the computation is memory intensive. What is line of adjustments made to the input to produce the output?

Maybe does it do many SHA-256 hashes on the input, making it memory intensive as the amount of hashes needed to be performed and the data they perform on gets backed up in RAM?

I did a very quick overview here

The SHA256 hash is just a wrapper around the meat of the salsa algorithm which happens between lines 373 and 400 of the code (two sets of 2048 calls each to the salsa20_8 half-round function).
hope2907
sr. member
Activity: 432
Merit: 250
Re: Scrypt mining only on GPU's? Any FPGA or ASIC companies out there?
October 16, 2013, 08:45:18 PM
#9
YES, in near future
Scrypt purpose is hardware intensive so that it limit the amount of fpga asic device can be use with same amount of money, unlike sha256 very cheap, but sell very high due to greedy of company an blindness of customer, scrypt asic or fpga will very expensive, and with current price/ dif it is not worth to buy -> no one buy, no one dev it
hulk
sr. member
Activity: 392
Merit: 250
Re: Scrypt mining only on GPU's? Any FPGA or ASIC companies out there?
October 16, 2013, 08:34:35 PM
#8
Although many FPGA scrypt mining have been announce, but all of them are pre-order and none of them have shipped working FPGA. So no body knows..
skeeterskeeter
full member
Activity: 160
Merit: 100
Re: Scrypt mining only on GPU's? Any FPGA or ASIC companies out there?
October 16, 2013, 08:27:20 PM
#7
Quote from: kramble on October 16, 2013, 05:38:06 PM
Quote from: skeeterskeeter on October 16, 2013, 05:28:43 PM
If anyone could, I've looked up scrypt on tarsnap and a few other places but I don't quite get it. It is an encryption algorithm? Could someone give a good overall pseudo-code for it?

Pseudo-code, no, but scrypt.c is a very readable implementation.

Not encryption, in mining usage its a hashing algorithm (but also usable for encryption, hence the confusion). And yes, its just a matter of comparing the resulting hash with the network target (1/difficulty). If its lower you've found a block (or a share if you're pool mining against a lower difficulty target)

The implementation is just above me. I get parts of it, but overall I can't follow it through. It looks like it uses SHA-256 function? But I also read that the computation is memory intensive. What is line of adjustments made to the input to produce the output?

Maybe does it do many SHA-256 hashes on the input, making it memory intensive as the amount of hashes needed to be performed and the data they perform on gets backed up in RAM?
kramble
sr. member
Activity: 384
Merit: 250
Re: Scrypt mining only on GPU's? Any FPGA or ASIC companies out there?
October 16, 2013, 05:38:06 PM
#6
Quote from: skeeterskeeter on October 16, 2013, 05:28:43 PM
If anyone could, I've looked up scrypt on tarsnap and a few other places but I don't quite get it. It is an encryption algorithm? Could someone give a good overall pseudo-code for it?

Pseudo-code, no, but scrypt.c is a very readable implementation.

Not encryption, in mining usage its a hashing algorithm (but also usable for encryption, hence the confusion). And yes, its just a matter of comparing the resulting hash with the network target (1/difficulty). If its lower you've found a block (or a share if you're pool mining against a lower difficulty target)
skeeterskeeter
full member
Activity: 160
Merit: 100
Re: Scrypt mining only on GPU's? Any FPGA or ASIC companies out there?
October 16, 2013, 05:28:43 PM
#5
Quote from: tokeweed on October 16, 2013, 05:02:34 PM
oh now you want asics.

lol Smiley

No I was just wondering, I had looked a few months ago and determined everything to be a scam. I just figured after peaking at LTCs market now that someone might have started or made something by now.

If anyone could, I've looked up scrypt on tarsnap and a few other places but I don't quite get it. It is an encryption algorithm? Could someone give a good overall pseudo-code for it?

I figure, from the BTC protocol, that you take the block header of the LTC block and run it through this algorithm to find a low probability output; the probability being based on the LTC difficulty setting of the network?

tokeweed
legendary
Activity: 3976
Merit: 1421
Life, Love and Laughter...
Re: Scrypt mining only on GPU's? Any FPGA or ASIC companies out there?
October 16, 2013, 05:02:34 PM
#4
oh now you want asics.
kramble
sr. member
Activity: 384
Merit: 250
Re: Scrypt mining only on GPU's? Any FPGA or ASIC companies out there?
October 16, 2013, 03:21:11 PM
#3
Quote from: skeeterskeeter on October 16, 2013, 03:07:18 PM
As of 0ct '13 I've looked around and can't find much. But is there any scrypt mining hardware out there or soon to be out that is not GPU based?

Nothing you can buy right now, but there are several in development, see project development on the litecoin forum.

WARNING there are also several obvious scams out there, eg scryptasic.org https://bitcointalksearch.org/topic/supposed-asic-scrypt-miner-scrypt-asic-international-259640
btcrich
sr. member
Activity: 302
Merit: 250
Re: Scrypt mining only on GPU's? Any FPGA or ASIC companies out there?
October 16, 2013, 03:20:50 PM
#2
No.  So far no ASIC has been developed for Scrypt.
skeeterskeeter
full member
Activity: 160
Merit: 100
Re: Scrypt mining only on GPU's? Any FPGA or ASIC companies out there?
October 16, 2013, 03:07:18 PM
#1
As of 0ct '13 I've looked around and can't find much. But is there any scrypt mining hardware out there or soon to be out that is not GPU based?



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