Posts Tagged ‘GTX 1080

ccminer-1-7-6-r10-neoscrypt

Here is an updated ccMiner 1.7.6-r10 Widows binary of the Nanashi Meiyo-Meijin fork (source) with optimized Lyra2RE and Lyra2REv2 performance. The latest r10 update fixes the hashrate issues that were present with other versions of ccMiner on the latest Nvidia Pascal GPUs such as GTX 1080 and GTX 1070. You can see a brief test of the performance of the new 32-bit Windows binary of the miner compiled with VS2013 and CUDA 8.0 below.

ccMiner 1.7.6-r10 Neoscrypt performance:
– GTX 1080 – 985 KHS
– GTX 1070 – 889 KHS
– GTX 980 Ti – 840 KHS

Just as a reference the latest ccMiner fork by SP has managed to provide just about 365 KHS on GTX 1080 and 668 KHS on GTX 1070, so now you can fully utilize the performance of the new Nvidia Pascal GPUs for mining NeoScrypt-based crypto coins. Do note that the results quoted above are with

To download the latest ccMiner 1.7.6-r10 with fixed Neoscrypt on Pascal for Windows OS…

gtx-1080-overclock-afterburner

Time for 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.

gtx-1080-founders-edition-gpu-black

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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