Intel Core i9-9900K 9th Gen Coffee Lake Review (Page 7)

| Oct 19, 2018 at 8:00 am CDT
Rating: 94%Manufacturer: Intel

Page 8[Overclocking and Power Consumption]

Power Consumption


We measure at the 8-pin power connector, and we see some pretty high power consumption as we did with the 2700X and PBOD. It could be motherboard vendors didn't securely power lock the CPU, but we do see that default power limits are set at 95W for PL1 and 118W at PL2, which is in line with a 15% decrease in converter power efficiency costs. The CPU will pull roughly 20-25W more than 95W if you use an AVX load at 100% on all cores at stock, and while that isn't too much, it is 25% more than what you might expect.


Intel Core i9-9900K 9th Gen Coffee Lake Review 24 |

A nice overclock I found was with 1.33v set with LLC Turbo level, 5.2GHz, XMP enabled, and I didn't mess with TJMax offset, although Intel has added that into the base UEFI code so you can increase it as the CPU can get pretty hot over 5GHz. I think Intel has added the ability to increase TJMax to 115C from 100C because they changed from paste to solder, which is a much quicker and better way to move heat from the die to the cooler. However, 100C is listed as junction temperature, so I decided to stay on the safe side of things with my CPU and not try and mess with throttle points. The CPU overclocks just as easy as Sandy Bridge and to the same frequencies.

Last updated: Nov 15, 2019 at 01:16 pm CST

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Steven went from a fledgling forum reader in 2003 to one of the internet's brightest tech stars by 2010. Armed with an information systems degree, a deep understanding of circuitry, and a passion for tech, Steven (handle Sin0822) enjoys sharing his deep knowledge with others. Steven details products down to the component level to highlight seldom explained, and often misunderstood architectures. Steven is also a highly decorated overclocker with several world records.

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