Time for some overclocking of the GeForce GTX 1070 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, but the good news is that the GTX 1070 FE still has the same 8-pin PCI-E power like the 1080, even though its default TDP limit has been lowered to 151W and the Power Limiter allows for just 12% increase over the default TDP (169W max TDP). There is already a tool for flashing modified video BIOS files available, so now the only thing we need figured out is how to modify the TDP limits in BIOS and other settings such as frequencies and voltages in order to be able to squeeze some additional extra performance over the stock clock capabilities of the Founders Edition cards and even more from the non-reference designs that are already starting to become available on the market.
We already know that the GTX 1080 and GTX 1070 GPUs are handling quite well overclocking and you can squeeze quite a bit extra performance from them if you are not limited and don’t care than much about the power usage. We are trying the GTX 1070 Founders Edition to see what it can do withing its current limits without touching the core voltage and what we got was: Power Limit + 12%, Core Clock + 210 MHs, Memory Clock + 830 MHs, the max settings that are running stable for 24/7 mining on our test card and the results are below. Do note that these can vary from card to card, so you should experiment until you find what works best for you. Regardless it seems that the GTX 1070 FE cards are doing quite well in terms of overclocking in general, so you should expect an nice extra performance boost from them and even more from the non-reference designs.
The performance increase we get after overclocking the Nvidia GeForce GTX 1070 Founders Edition card with the clock settings above are pretty much consistent with what the GTX 1080 FE shows. The performance boost in terms of hashrate increase in the various algorithms is about 12-14% higher than at the stock settings and better results could be achieved with increase of the voltages, however with that you will also need to be careful that you are fitting in the TDP limit. It is interesting to note that the GTX 1070 FE does perform better on NeoScrypt (668 KHS stock/771 KHS overclocked) than the 1080 FE, but it it still outperformed by the GTX 980 Ti for example. It seems that the slower GDDR5 video memory used here does perform better with the memory intensive algorithms unlike the faster GDDR5X memory used in the 1080, however the GTX 1070 still needs some fixes for NeoScrypt. As already noted the situation with Pascal GPUs including the GTX 1080 and the GTX 1070 is the same for Ethereum mining under Windows resulting in very low hashrates, so while waiting for a driver fix you might want to go for Linux for Ethereum mining on these cards. All other algorithms we have tested besides the not so great NeoScrypt performance are doing well under Windows 7 and 10, so mining for these you don’t need to rely on Linux, especially if you are no good with it.
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