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Testing the Nvidia GeForce GTX 1070 Founders Edition for Crypto Mining

24, Jun 2016

nvidia-geforce-gtx-1080-founders-edition

Recently we have tested the new Nvidia Pascal-based GeForce GTX 1080 Founders Edition GPU for crypto mining and it is now the time to see what the little brother in the form of GTX 1070 is also capable of. The Nvidia GeForce GTX 1070 Founders Edition is a little stripped down version of the current top model in the form of GTX 1080, but generally the two are not that different. The GPU on the GTX 1070 is a bit less powerful and the memory is regular GDDR5 instead of the GDDR5X used in the 1080. The cooling solution, the backplate, even the 8-pin power connector are the same on both and that should signal a good overclocking potential for the GTX 1070 and the significantly better price makes it the more interesting of the two for crypto mining. Do note that the TDP rating of the GTX 1070 is just 151W and the power limiter allows you for just 12% increase over the stock limit, so you get 169 Watts max without having to resort to something like BIOS modification for example in order to be able to get serious in terms of overclocking. We are going to cover the overclock for the GeForce GTX 1070 and the mining hashrate with OC in a follow up article, for now we are comparing only the performance at stock settings.

We have already discussed the not so good situation with Ethereum mining on the GTX 1080 and unfortunately things are the same with the GTX 1070. Mining Ethereum under Windows is pointless at this point as the hashrate is very low (issue with the video driver) and although this might be fixed at a later time with a driver update, for the moment the only option you have is Linux. The results under Linux are not great though the GTX 1070 apparently does perform better because of the GDDR5 memory even at lower frequencies as compared to the GDDR5X, especially when you overclock the GTX 1070. We are going to be doing some more testing for this under Linux at a later time in order to see what the new Nvidia Pascal-based GPUs are really capable of for mining crypto currencies based on the Dagger-Hashimoto algorithm like Ethereum, but for now we are focusing on the other algorithms.

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The results we’ve got for other popular algorithms besides Ethereum’s Ethash are pretty interesting as you can see from our summary in the table. It is interesting to note that the GTX 1070 is a bit faster in all algorithms besides Decred than the GTX 980 Ti and it does it with a significantly lower power usage. Price wise the GTX 1070 is still a bit more expensive than GTX 980 Ti, but the power savings on the long term should more than justify the difference. With that said we should note that the GTX 980 Ti has never been one of the popular Nvidia video cards among miners due to the pretty high price that it has been keeping. Compare to GTX 970 the new GTX 1070 is significantly faster, and the results of the 1070 were not that close to the ones from GTX 1080 as we’ve hoped they could be. With some overclocking however we expect that the gap in performance between a stock GTX 1080 and the OCed GTX 1070 cloud become pretty insignificant, but that would need some more testing to confirm.

Do note that we have not included results from Lyra2RE and NeoScrypt this time, because with both algorithms the GTX 1080 and GTX 1070 did not perform well and would need some optimizations. In fact there is already an optimized version of ccMiner that fixes the performance issues with Lyra2RE that also brings quite big performance boost for older GPUs as well – ccMiner 1.7.6-r6 fork With Faster Lyra2RE, but for Neoscrypt the performance of the Pascal GPUs needs some work.

Nvidia GeForce GTX 1080 Overclocking and Mining Hashrate

18, Jun 2016

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Time to overclock monitor or even some overclocking of the GeForce GTX 1080 Founders Edition and running the tests again to see what hashrate increase can we expect from the GPU with the increased operating frequencies. The Founders Edition cards are somewhat limited in the max power you can get by the presence of only one 8-pin PCI-E power, default TDP limit of 180W and a Power Limiter that allows for just 20% increase over the default TDP (216W max TDP). We already know that the GTX 1080 and GTX 1070 GPUs are handling quite well overclocking and you can squeeze a lot more from them if you are not limited and don’t care than much about the power usage. Unfortunately for some more serious overclocking you will have to wait for the GTX 1080 cards that come with custom cooling solutions form Nvidia’s partners that will allow for more serious overclocking. Meanwhile we are pushing the GTX 1080 Founders Edition to what it can do without touching the core voltage and doing some benchmarks with: Power Limit + 20%, Core Clock + 240 MHs, Memory Clock + 125 MHs, the max settings that are running stable for 24/7 mining on our test card and the results are below.

gtx-1080-stock-vs-oc-hashrate
As you can see from the table of hashrate results with the stock settings and the overclocked GTX 1080 the average performance increase we are getting is about 12%. A result that is not bad, but a more serious overclock can help us get even more hashrate from the GPU, unfortunately making it less attractive in terms of hashrate per watt. The problem with low performance for Neoscrypt and not that great for Lyra2RE still remain and unlike with Ethereum where we see some, though not enough, performance boost testing under Windows 10, with these two algorithms Windows 10 does not help, so they really need GPU specific optimizations to max out performance unlike the other algos that already scale pretty well on the GTX 1080. Other algorithms also do not show any significant difference in results between Windows 7 and Windows 10, so no need to upgrade or downgrade your OS. Of course for Ethereum mining on GTX 1080 or GTX 1070 you would still need to go for Linux for the best possible performance as still Windows hashrate is not satisfactory at all.

Nvidia GeForce GTX 1080 Founders Edition Power Usage for Crypto Mining

15, Jun 2016

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Time for a quick look at the power usage of the GeForce GTX 1080, the reference design from Nvidia that has a TDP of 180W set by the manufacturer, making it pretty energy efficient for the performance it provides for crypto currency mining. We are checking the situation with the different algorithms apart from Ethereum, because we already know that the GTX 1080 is far from great choice for Ethereum mining.

gtx-1080-power-usage

The GTX 1080 Founders Edition TDP limit of 180 Watt has a power limiter that can give you up to extra 20% increase, moving the slider to increase the maximum available power to be used by the GPU. This can help you get some extra hashrate for the algorithms that max out the 180 Watt TDP of the GPU and as you can see these are actually quite a few. The non reference versions of GTX 1080 should come with higher TDP limits and even higher factory clocks, so they should be able to achieve even more performance as they will be able to keep higher boost frequency of the GPU while mining. Then again you might also want to lower the power limit in order to reduce the power usage and get an even better hashrate per Watt of power used, but for that you might have to also play with the voltage of the GPU for best results and also the clocks.

In the table above you can see that Neoscrypt and Lyra2Re are far from maxing out the TDP of the GTX 1080, the reason for that is that they do not perform that well in terms of hashrate, so some optimizations for them might help give you better performance. Other than that the power usage is high and the hashrate you get is seriously increased as compared to the previous generation of Nvidia GPUs, so performance per Watt for the GTX 1080 is actually great in most algorithms for crypto mining.


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