Posts Tagged ‘KNC Titan Scrypt ASIC


After our not so successful experiments in trying to use immersion cooling with mineral oil for the KnCMiner Titan Scrypt ASIC we have moved to trying out different things to make the device run cooler and silent. The obvious next step would be to use water cooling and the options for this are many, so we have decided to start by trying with a pre-filled closed loop All-In-One solution that is ready to be installed just to test out things. We were pleasantly surprised that KNC has decided to use standard mounting holes for 115x Intel sockets on the PCB of the device, so the installation for a water cooling solution designed to support these sockets should not be a problem. The water cooler should be capable of dissipating about 300 Watts of power coming from the Titan ASIC chip (actually four chips in a single package). We have opted out to start with a Silverstone Tundra TD02-SLIM AIO water cooler – dual 120mm slim radiator with two silent slim fans and the results we got with it cooling the ASIC were very good. Using a larger radiator and slightly more powerful fans can help you get even better results temperature wise and still have silent operation, even thicker single 120/140mm radiators could be able to handle things well enough.


Whatever water cooling solution you go for you need to make sure that the top of the water cooling block is clear, so hat you can place a cooling fan on top of it. The actual problem with the Titan Scrypt ASICs is not the main chip(s), but the DCDC power modules that provide the ASIC with the needed power. The design that KNC has chosen makes it hard to cool them properly and their solution that uses very thick thermal pads is not great either. So if going for water cooling installing the water block is the easy part, keeping the power modules cool is the hard one. In fact you can cool them by just placing a powerful 120/140mm fan on top of the whole thing to blow cold air directly over them…


Our test with a 140mm Noctua NF-A14 iPPC-3000 PWM fan for cooling the DCDC power modules proved a success in keeping acceptable temperatures, but not in keeping the device silent. The idea to use water cooling instead of the standard water cooling is to make it run cooler and more silent. So the solution would be to do a custom set of heatsinks to fit on the DCDC power modules and have a silent fan blowing on top of them in order to make the cooling efficient and silent enough. Reusing the stock air cooling plate wit the thick thermal pads that the miner comes with will not do well, but it can give you some ideas, just make sure you use thin thermal pads or a thin layer of thermal grease. The end result will be totally worth it in making the KNC Titan run silent and effective especially for home miners with the summer heat not too far away.


The Energy Saver feature of Gentarkin’s custom KNC Titan firmware was something that we wanted to try out in the 1.0.2 version and we tried to do it, but there was a bug that was causing the process to continue for days without finishing. With the release of the new 1.0.4 version of the custom firmware the issue in the Energy Saver feature has been resolved and we were finally able to finish a complete run on a single Titan Cube in less than 24 hours. On the image above you can see the stock settings of a fully functioning Titan Cube with all cores at 325 MHz with -0.0366V set for each core. The total power usage with these “default” settings is about 347 W and with the PSU power efficiency taken into account it makes it at about 384 Watts with a highly efficient PSU at 92% efficiency, with a less efficient PSU at lets say 85% the power usage will be higher at the wall and the final savings should be more.


The idea of the Energy Saver feature is to find the optimal lowest operating voltage of each core automatically and test to ensure the miner can run stable at these settings. As a result you get lower power consumption (lower energy bill) and less heat generated by the components, so in theory you should be able to extend the life of your mining hardware as well. All is done automatically and in the end you just need to confirm the settings that are being suggested. Our results for the fully functioning cube set at 325 MHz after the Energy Saver feature was over was an optimized voltage for all four cores at -0.0732V with a slight reduction of operating temperatures of the DCDC power modules. The more important thing is the reduction of the power usage, the actual consumed power by the device went down from about 347W to about 317W or about 30 Watts down, and a total of about 32 Watts lower power consumption at the wall. It may not seem that much, but this is close to about 10% and if you get 30 Watts lower power usage per cube and have a lot of cubes the number and power savings can get quite big. One more reason for users of KNC Titan Scrypt ASIC miners to get Gentarkin’s Custom Titan Firmware.

Visit the official website for GenTarkin’s Custom KNC Titan Firmware for more info…


GenTarkin’s custom modified KNC Titan Scrypt ASIC firmware has been updated to version 1.0.4 with the update focusing on fixing issues that may cause the Energy Saver function to get stuck and never finish optimizing the power usage of the mining cubes attached to the controller. The modified firmware provides users with better and more functional interface and more importantly a more safer to use and better performing miner. This very useful extra functionality provided by GenTarkin’s Custom KNC Titan Firmware comes at a price, you need to purchase a full license for the modified firmware that is currently sold at $75 USD for the controller and if you have an additional devices you can purchase extra licenses for $35 USD each for each controller (key for activation only), not for each cube.


We have been using the previous release 1.0.2 for some time already and are really happy with it, though when we wanted to test the Energy Saver feature we apparently got trapped in a loop taking days and the optimization process not finishing. So hopefully we would be able to finish our testing of the automated functionality intended for reducing the power consumption of KNC Titan miners with the new 1.0.4 version of GenTarkin’s Custom KNC Titan Firmware. So stay tuned for our report on our experience and results using the extra Energy Saver feature with the new release in a couple of days. Other than the issue with the Energy Saver feature looping for days without finishing the process we are very pleased with the modified firmware as compared to the latest official firmware for the Titan miners. So we would advice all KNC Titan ASIC owners still using the official firmware to check out the latest GenTarkin’s Custom KNC Titan Firmware.

Visit the official website for GenTarkin’s Custom KNC Titan Firmware for more info…