I got my 2019 iMac the other day. Been doing some tests...
- With X-Plane 10 on the same settings as my Late 2013 iMac, I am getting 70 FPS( 35 FPS with those settings in my 2013 iMac) and the i9 running at 4.7 Ghz at 90 C and the Vega 48 running at 79 C with the fan in auto.
- Doing some Cinebench runs..... Going full out the i9 spikes to around 100-110W before being pulled back to a consistent 85W power draw running at 3.8-3.9 Ghz at 82 C with fans on auto. Increasing the fan to 2600 RPM buys another 100 Mhz out of the i9 and runs at 72 C. Limiting Cinebench to 1 thread, the i9 maxes out at 4.7-4.8 Ghz with temps settling around 65 C with fan on auto. Limiting it to 6 threads( to have it mimic the 9600K) sees it running at 4.5 Ghz( over 4.2 Ghz for the 9600K having all 6 cores loaded) and produces a higher score than the 9600K.
As expected, Apple has put a leash on the 9900K. It still is putting out great performance, but not what the chip is truly capable of. I have yet to see it hit its max turbo speed of 5 Ghz( though with a peak of 4.8 Ghz, I can't be mad over 200 Mhz). It does seem to be restricted to 85W's at its max power draw over its rated 95W. Whether that is due to the power supply unable to supply more power to it or a thermal constraint, who knows. But doesn't seem to do much harm in performance as going full out it is maintaining 3.8-4.0 Ghz( depending on fan speed) where when Anandtech limited it to 95W( vs an unrestricted 9900K), 7-8 cores being loaded saw speeds drop to its base clock of 3.6 Ghz. But they did see 5 Ghz where the 9900K in the iMac seems to top out at 4.8 Ghz.
I have 32 GB of ram from OWC arriving tomorrow to bump it to 48 GB of ram.
giggity
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