Topic: [ANN][DASH] Dash (dash.org) | First Self-Funding Self-Governing Crypto Currency - page 6119. (Read 9724115 times)

Is the miner using any cpu to enhance the speed? Btw, I've often thought what if some of the hashes are better performed in the cpu than in the GPU? What if some functions were done in the CPU and some in the GPU for max performance? Surely there'll be a waiting impact from CPU-GPU crossover as data flow from GPU ram to system RAM but it may be worth a try to see if something can actually be improved way more (like +20/30/50%)... Then again the performance hit from waiting as data moves from cpu-gpu-cpu might be too large to gain anything.

This wouldn't be accurate either. The correct phrase should be: I used some of the code from sph_miner with some of the code from cpuminer and some improvements of my own... As for getting the speeds people are getting with their 280x, thay are overclocking really high. My hardware does not support that, so i cannot test with the same settings as them. The best i can do is 2.5Gh/s with 1100/1500 OC.



That's ok, i'll keep looking for someone who can test it and has the trust of the community.

I think 290 or 290x get 2.3-2.5 Mh/s speed and not 280x gpu.

I think 290 or 290x get 2.3-2.5 Mh/s speed and not 280x gpu.

This wouldn't be accurate either. The correct phrase should be: I used some of the code from sph_miner with some of the code from cpuminer and some improvements of my own... As for getting the speeds people are getting with their 280x, thay are overclocking really high. My hardware does not support that, so i cannot test with the same settings as them. The best i can do is 2.5Gh/s with 1100/1500 OC.



That's ok, i'll keep looking for someone who can test it and has the trust of the community.

yeah most 280x get 2.25-2.3 right of the package... You just had a broken old version of a miner if you only got 1.8mh/s

You actually wrote: "I made some speed improvements in the GPU miner listed on the first page."

The GPU miner listed on the first page is sph-sgminer, not the cpuminers.

The correct phraseology would be something like "I tweaked the cpu miners on the first page to work with openCL and now I'm getting better speeds than even sph-sgminer" (which from I gather from those posting their 280 results is not really slower).

Yeah well, this is cryptoland... you know how things go. Sorry I can't check your code to see if it works (I lack the skill) + I've uninstalled my GPUs due to rising temps.

My gigabyte board would freeze on anything higher than 1500/1100. I'm unable to test the code on those conditions! (i'm really impressed on this asus one)!

For any market maker, be it an exchange or whoever, the ability to curb wild swings of the price is VERY important.

Items on exchanges don't sell out like on eBay, you can't compare that.

If you want to trade against fiat you need liquidity, or you get eaten by anybody who has it.

Like a central bank, just like that.

As i said before, i use the codebase from my previous miner for metiscoin, based on cpuminer, but with GPU capabilities: https://github.com/girino/cpuminer

If I was trying to scam people i'd probably use a sph_miner screenshot (unless i was really stupid).

I have worked on some GPU miners in the past, as you can see on those links:

https://bitcointalksearch.org/topic/annmtc-gpu-miner-for-metiscoin-35-faster-on-r9-280x-447298

https://bitcointalksearch.org/topic/m.4917971

https://bitsharestalk.org/index.php?topic=2460.0

(this proves nothing about the current miner, of course, but shows evidence that I have the expertise to do what i claim)

Sure.  I have Asus 280x cards -

2.341 avg Mhash (running stable since last reboot(60 hours))
2.1% reject rate

Afterburner overclock settings:
memclock: 1800
coreclock: 1180
power limit%: +20

SPH-SGminer device1.conf settings:
"kernel" : "darkcoin",
"lookup-gap" : "2",
"intensity" : "13",
"worksize" : "256",
"thread-concurrency" : "8192",
"failover-only" : true,
"scan-time" : "1",
"device" : "1",
"gpu-threads" : "2"

.bat contents:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
sgminer.exe --config device1.conf

probably so with adequate tweeking, i guess. Could you please tell me the settings with which you get that speed and i'll try to use them on my code to see what the improvement will be.

Thanks.

Oooh, its actually very important for an exchange to be able to provide enough liquidity on both sides of the book.
Otherwise they would be easy fodder for the sharks. Soros like.

Whitecoin suffers variant of 51% attack

whitecoinIt appears that in the early hours of 30th April, a coordinated double-spend attack was launched against the whitecoin network. The incident affected digital currency exchanges and mining pools, and has sparked questions regarding the future of the altcoin.

A statement published on 1st May by whitecoin community member and developer Mogonzo detailed the attack.

According to Mogonzo, the event took place in two stages.

The first part of the attack involved a dedicated denial-of-service (DDOS) attack against the mining pool Chunkypools. This enabled the perpetrators to assume control of the network and gain control of the block chain.

A time warp attack was then launched against several exchanges. This is a variation on the 51% attack, which involves artificially lowering the block difficulty in order to generate coins quickly.

The attackers used the time warp attack to generate multiple blocks of whitecoins that were then sent to exchanges and sold. Cryptsy, MintPal and Bittrex were among the exchanges affected by the attack.

In the statement, Mogonzo advised whitecoin users to avoid use of the existing wallet infrastructure:

“We continue to discourage wallet use at this time until our update is provided. It’s taken us some time to develop a full understanding of what happened, as well as develop a solution.”

At press time, representatives from the exchanges were reportedly meeting with members of the Whitecoin Foundation, the coin’s community organisation, on coordinating deployment of the new wallets.

If an exchange needs liquidity, it's doing it wrong or up to no good. They're not banks, they exist to swap money between customers and take a small cut of each trade, that's all, they shouldn't need stockpiles of whatever they list.

I think it's great you are trying to improve the code but SPH-SGminer already gives 2.3Mhash per 280x.

my opinion:

Just send the code to coins101, AlexGR, chaeplin or other senior trusted member (who agrees) of our community to verification. Later you might claim some donations...

Well, you are saying that i should help people make money (literally), by mining but that i should not get any money for it? really???!
No one will "rediscover" my "fix" for free either. This kind of improvement requires hard work and those who rediscover it will be willing to be rewarded for their work.