![]() The new generation of motherboards that launch with this CPU will be the best boards to use for those tests, and we’ll have a batch of them ready when the NDAs of those manufacturers expire. Update: Our first follow-up test has already confirmed a lower, 25W full-load power delta between the Core i7-7700K and Core i7-6700K when using a different motherboard. The “no free lunch” statement still applies since 141W is more than 133W, but the only way I’ll reach an accurate conclusion about how much more power the higher 4.50 GHz frequency requires is to compare more boards. However, when I did try to troubleshoot my computer the clock speed sometimes fluctuates between 4ghz - 1ghz and then back to 0.8ghz after a period of time. Idle energy also dropped to 24W after several hours, but an idle period of that length exceeds normal test procedure. I opened task manager just to find out that my i7 6700k is running at 0.8ghz, which is abnormal compared to the normal 4ghz. Maximum power draw then dropped to 141W when turbo boost was disabled (bringing us down to the default 4.20 GHz see chart below). It did this twice, both times after I initially used the CLR_CMOS jumper. This particular motherboard dropped the full-load CPU voltage by around 20mV and the maximum full-load multiplier to 42x after I changed from firmware defaults to manual configuration and then back to automatic settings. Our motherboard set the Core i7-7700K to 1.30V at its 4.50 GHz max turbo, whereupon it behaved exactly the way we’d expect our Core i7-6700K to act when overclocked to 4.50 GHz at 1.30V. Intel didn’t change the core micro architecture between Skylake and Kaby Lake, and our motherboard didn’t even read a voltage reduction for the Core i7-7700K, compared to the Core i7-6700K. We’re also told that process improvements will enhance efficiency, but there is no free lunch. We can’t say much about the revised Intel HD Graphics 630 without access to Intel documentation, which should be forthcoming when the company provides its usual information exchange closer to launch time and none of our programs can pick out any pertinent information. It’s because we’ve seen the Core i7-7700K and Core i5-7600K in action that we can provide that data for those two processors, and the asterisks in the chart indicate guesses derived from Intel’s previous models. What the company didn’t mention was the graphics version or Intel Turbo Boost frequencies. Intel accidentally leaked a little information about its desktop Kaby Lake CPUs in a document concerning other variations of the processor.
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