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Author Topic: NSGminer v0.9.4: The Fastest NeoScrypt GPU Miner  (Read 218807 times)
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August 19, 2014, 05:12:24 PM
 #61

Why don't you look at the documentation on GPU programming?
Original scrypt was already compute bound. Neoscrypt is even more compute bound. People in GPU programming would go great lengths to have half the arithmetic intensity original scrypt had.

I'll ask you again: what does "memory intensive" mean? Fetching some memory every once in a while isn't an "intensive" operation.

What am I supposed to do with your documentation on GPU programming? NeoScrypt has no sole purpose of running perfectly on GPUs either existing or to come. Neither Scrypt had it originally. NeoScrypt performs very well on CPUs now and it's going to be even better with the following optimised releases of CPUminer. It takes full advantage of large and fast L2 caches. This is something you don't find in GPUs and ASICs because high clock and low access latency multiported synchronous SRAM is very expensive. GPUs do very limited caching at all. They rely upon GDDR5 memory bandwidth and large thread count because access latency is terrible. Scrypt ASICs must be using eDRAM which is more expensive than GDDR5 and faster due to lower latency and wider internal data bus, but it's DRAM still and doesn't clock very well. Intel Crystalwell has made it to 1.6GHz which is absolutely not impressive if compared to ~4GHz of modern CPUs with their L1 and L2 caches. Even single ported asynchronous SRAM used for L3 caches seems better than eDRAM for performance reasons. Let's see how GDDR5 and eDRAM work against SRAM under NeoScrypt.

What comes to memory intensity, you can calculate how many quarters it takes to produce a single hash for Scrypt and NeoScrypt.

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August 19, 2014, 06:20:32 PM
 #62

Arithmetic intensity, also known as ALU:TEX ratio... anyhow if it's not for GPUs then I guess this is the future of CPU mining?

I am very confused and I cannot make any sense of what you just wrote.
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August 19, 2014, 06:22:17 PM
 #63

Quote
My Cuckoo Cycle PoW spends 67% of its time on memory access. In other words, if you leave out all memory accesses, and just do the remaining computations, then runtime reduces to 33% of original.

That's what I would call "memory intensive".
And I'd fully agree with you tromp! By contrast, original scrypt is compute bound and neoscrypt seems to be even more so.
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August 19, 2014, 07:01:00 PM
 #64

Arithmetic intensity, also known as ALU:TEX ratio... anyhow if it's not for GPUs then I guess this is the future of CPU mining?

I am very confused and I cannot make any sense of what you just wrote.

Well, it's still a decent choice for GPUs. Lower memory requirements allow to run more threads in parallel to work around access latency. I cannot tell how good it will be, but I expect NeoScrypt CPU and GPU miners to co-exist for some time. I don't expect ASICs soon because NeoScrypt is unlikely to be implemented as a by-product in SHA-256 or Scrypt devices due to different hardware requirements. SHA-256 ones are very simple high speed ALUs with next to nothing memory requirements. Modify the ALUs and add some eDRAM = universal SHA-256/Scrypt ASIC. I doubt their designers would like to modify the ALUs even more and include fast SRAM to satisfy NeoScrypt.

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August 20, 2014, 10:44:12 PM
 #65

This miner is not well optimized, is giving half hash rate for scrypt and sha256d than with Pooler CPU Miner.
This one is pulling only 65 Watts, neoscrypt is worst with 58 Watts. Pooler CPU Miner pulls 77 Watts with scrypt.

 
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August 21, 2014, 08:55:48 AM
 #66

First I'm hearing of NeoScrypt. Sounds interesting and could have a future, especially when the Scrypt ASIC miners start to come out.
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August 21, 2014, 09:08:04 AM
 #67

This miner is not well optimized, is giving half hash rate for scrypt and sha256d than with Pooler CPU Miner.
This one is pulling only 65 Watts, neoscrypt is worst with 58 Watts. Pooler CPU Miner pulls 77 Watts with scrypt.

First of all its not even live for 1 month, so optimization will follow automaticly, next thing is that CPU isnt the maintarget, GPU should enter this terrain soon.

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August 22, 2014, 08:37:23 PM
 #68

First I'm hearing of NeoScrypt. Sounds interesting and could have a future, especially when the Scrypt ASIC miners start to come out.

As far as I know Scrypt ASIC miners are everywhere already...
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August 23, 2014, 02:37:04 AM
 #69

First I'm hearing of NeoScrypt. Sounds interesting and could have a future, especially when the Scrypt ASIC miners start to come out.

As far as I know Scrypt ASIC miners are everywhere already...

First generation of ASIC scrypt miners are already obsolete as the latest generation of ASICS have moved the first generator to cost more to run than they make if your electricity costs more than $0.15 to $0.20 a kW, so they are not only everywhere, but the 'arms race' like is happening on bitcoin is now happening with Scrypt

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August 31, 2014, 07:52:04 PM
 #70

GPU miner is working.
Need more testing and tweaking still.
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September 01, 2014, 07:37:22 AM
 #71

Please keep us informed on temperatures!
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September 01, 2014, 07:44:47 PM
 #72

GPU miner is working.
Need more testing and tweaking still.

Where can I download GPU miner?


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September 01, 2014, 08:51:03 PM
 #73

I can't wait for 20 years from now when we all know what happened with cryptos and what they became.

 
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September 01, 2014, 10:50:59 PM
 #74

GPU miner is working.
Need more testing and tweaking still.

Where can I download GPU miner?

It's still in beta and is actively been tweak daily at the moment, so not quiet ready to be released, but soon.

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September 09, 2014, 03:58:25 PM
 #75

GPU miner is working.
Need more testing and tweaking still.

Where can I download GPU miner?

It's still in beta and is actively been tweak daily at the moment, so not quiet ready to be released, but soon.

Can I help beta testing? I'm a software developer, tons of xp on c/c++ and i have been looking through opencl a little bit.

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September 09, 2014, 10:49:10 PM
 #76

We have enough beta testers at the moment, but I think we are getting close to getting it ready for release now.
They fixed stratum support for p2pool mining last night on cgminer.

Hopefully it won't be much longer

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September 09, 2014, 11:03:45 PM
 #77

Really no surprise, Feathercoiners are always developing something Tongue Looking forward to seeing how FTC and UFO do with this improvement.
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September 11, 2014, 02:17:28 PM
 #78

waiting for the gpu miner.
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September 11, 2014, 02:19:13 PM
 #79

yay another POW coin  Cheesy Sad Sad Sad Sad
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September 11, 2014, 02:31:00 PM
 #80

yay another POW coin  Cheesy Sad Sad Sad Sad


No, not a new coin, go back and read the thread.
Neoscyrpt is a new proof of work (PoW) algorithm to replace scrypt to keep ASICs from centralising the mining power like has happened with Bitcoin and will happen with any coins that stay using Scrypt.

At the moment only Phoenixcoin is using Neoscrypt and rather than being a new POW coin it has been going since May2013.
The next coin to change over to Neoscrypt will be Feathercoin which has been going since April 2013.
Following closely behind that will be UFO Coin which is the new comer only being launched back in December 2013.

So rather than 'another POW coin' Neoscrypt is the future for any coin not wanting to be centralised by the coming wave of ASICS

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