Archive for the ‘Mining Hardware’ Category

kncminer-titan-scrypt-asic-miner

Today the guys at KnCMiner have released some tips for users that have received or are about to get their Titan Scrypt ASIC miners regarding how to maximize the hashrate and meet the announced 300 MHS expectations that users are having. According to KNC the use of crypto coins with very fast blocktimes on multi-pools are not recommended for maximum hashrate and they do recommend users to go for the following pools that should not have issues with the high hashrate that the Titan miners have:

WeMineLTC (stable above 300MH/s, this pool also merge-mines DOGE).
LiteGuardian (best performance so far but LTC only (no merged DOGE mining)) 300MH/s+
GHash (300MH/s+ on both LTC and Multi-pool)

KNCMiner have also announced that they are working with some other pools in order to improve performance with the Titan miners where currently users are having trouble getting at 300 MHS. These pools include Coinotron, where they are apparently getting around 260-270MH/s so far as well as CleverMining and apparently others that were not cited in the latest news release coming from the company.


The settings KNC recommends to be used on the mentioned above pools:

WeMineLTC: Use the regular stratum and leave the worker settings at default; stratum+tcp://power.wemineltc.com:3333
LiteGuardian: Use the ASIC-ready URL: stratum+tcp://asic1.liteguardian.com:3335
Ghash: Set the difficuly to 8192 at the pool, you can find this under worker settings. You can use the LTC/DOGE or Multipool URLs: stratum+tcp://ltc.ghash.io:3333 or stratum+tcp://multi.ghash.io:3333

This however is not enough to cover for the many more problems that users who have already reported after receiving their Titan miners as the lower than advertised hashrate is just one of the issues that is often experienced. It also does not cover the fact that KnCMiner is already late in shipping all of their Titan Batch 1 miners to users, something that was supposed to happen before the end of Q3 and we are already Q4 with a lot of people still waiting for their mining hardware. With the KNC policy of not offering refunds to customers, their products having a lot of issues, the company delaying shipments and so on it seems that a lot of people are already considering taking legal action against KnCMiner…

zeusminer-rockminer-partnership

ZeusMiner is making ASIC Scrypt miners, however it seems that the company is also interested in offering Bitcoin mining hardware as well and as a result they have announced a partnership with a well-established brand in BTC mining – Rockminer. As a result of this partnership between the two companies you can purchase the 800 GHS Rockminer T1 ASIC miner at a price of just $369 USD, a nice deal if you are looking to invest in SHA-256 mining hardware. The Rockminer T1 is rated to provide 780-840 GHS hashrate with a power usage of about 1000 Watts, do note that the miner does not come with a PSU included, so you will need to buy it separately and unfortunately this adds extra cost if you don’t yet have a powerful PSU available. Do note that ZeusMiner does ship from China, it is not yet clear if the distributors of Zeus will also be offering Rockchip miners and if the price will be as good.

For more information about the new deal for a Rockminer T1 Bitcoin ASIC miner…

gtx-980-ccminer

Nvidia has just introduced their new high-end Maxwell-based GPUs the GTX 980 and GTX 970 and the expectations from them in terms of performance for crypto mining are pretty high. After earlier this year we saw what the mid-range GTX 750 Ti, the first Maxwell card was capable of, we already had high hopes for the upcoming faster models. Apparently we are not going to be disappointed by the performance we are going to get, below you can see a chart with the hashrate that the new GeForce GTX 980 (GM204) provides in various crypto algorithms. These were actual tests ran using the latest versions of CudaMiner and ccMiner with support for Compute 5.0 with no special optimizations that could possibly benefit the new cards any further.

gtx-980-cryptomining-hashrate

In the table you can see the algorithm, the hashrate you get with the GTX 980 and the TDP usage percentage. The GeForce GTX 980 has a TDP rating of just 165 Watts, so with this maximum power consumption you can see that not all algorithms are utilizing it at 100%, meaning the actual power usage is lower. The performance you can expect to get from the GTX 980 is roughly about three times higher with about three times more power usage as compared to the GTX 750 for crypto mining. The initial price of the GTX 980 however could be a reason for miners to go to the slightly slower GTX 970 model for crypto mining as you should be able to get two GTX 970s for a price a bit higher than for a single GTX 980 and the performance you will get from the two cards should be significantly better than from a single GTX 980.

gtx-980-overclock-results

The results posted above are with a reference GTX 980 card running at stock frequency, considering that the GM204 does overclock really good, higher results can be attained when the card is overclocked. The second set of results (the OC ones) are achieved with the card overclocked to GPU at 1520 MHz, Video RAM to 8250 MHz and TDP limiter set to the maximum 125%. This is really pushing the GTX 980 to its stable maximum limits as the card really does handle serious overclock pretty well. Unfortunately we do not have access to a GTX 970 GPU for the moment, so we cannot yet test to see the difference in performance, though it should not be that high, but the 970 should be available at a much more attractive price, so it could be the more obvious choice for crypto mining rigs. The GTX 750 Ti still seems like a good more budget oriented solution for mining.

You should be well aware of the fact that some ccMiner forks are nor working very well with the GTX 980, we’ve had some weird results showing like way too little load and low hashrate or the miner crashing, also one of the reasons that not all available algorithms are listed. The GTX 980 and GTX 970 does support Compute 5.2 and not all forks of ccMiner we have used for testing are compiled to even support the Compute 5.0, the CudaMiner has not been updated for a while and we have used the latest official release for the Scrypt testing… not that you would use a GPU nowadays to mine Scrypt crypto coins anyway.


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