![]() I've been messing around with ZCash lately, and know I can do a lot better than 15Sols/s. There's just something preventing the graphics processor from scaling to an appropriate level. Eventually I stopped it so as not to completely burn out my laptop, and have never since been able to replicate the situation. ![]() And I was getting respectable scrypt hashrates, at the pool! Nothing crazy, but 1-2MH/s (compared to the 10-15KH/s I averaged normally.) It was not a fluke, it was continuous, for a while. That one time I spoke of earlier, I don't know what exactly happened, I started BFGMiner as usual, with the same config file I always used, no new options, and the graphics frequency shot up. I've tried to find a way to directly access the bus (as Intel Extreme Tuning Utility only allows for adjustment of the ratios and voltages that affect maximum processing speed, but the governor remains Windows Ondemand,) but it seems nothing exists. Instead the gpu ramps up to it's minimal operating frequency of 349Mhz, and refuses to go any higher. For all mining apps I've tried, this is not the case. Now I've seen the GPU frequencies (labeled in the Intel Extreme Tuning Utility's analytics as "processor graphics frequency") go above my max core frequency ( which is Intel "Turbo Boost" up to 3.6Ghz,) and technically, it should be able to run at twice the core speed, at least for short time spans, and consistently at, at least 2500Mhz (I've witnessed during stress tests.) But here's my issue: when playing a graphics heavy game, for instance, the GPU clocks right up and performs as it should, adjusting to the change in workload. Mining on the CPU alone, the graphics core was in it's 0Mhz state, so I know the jobs are in fact being "routed" through the graphics core. It can also go to a 'C1E' like state when the screen is still, at which it shows a frequency of 0Mhz. That while mining using opencl on the Intel gpu, my gpu was running at it's minimum speed of 349Mhz. ![]() Using Intel Extreme Tuning Utility, CpuZ and GpuZ, I was able to deduce the root cause. I've tried various algos and I always and up hashing at rates far below what I should be. I've read a lot of varying information on the subject, but much of it's outdated and a lot of it is contradictory. ![]() So I've been messing around for a while with trying to mine on an Intel integrated GPU. So here's my question, I'll start with the background. ![]()
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