The compute command of diglloydTools MemoryTester provides graphable data which shows how well the CPU cores of the machine scale to a multithreaded job. My guess is that 10 cores 3.3 GHz is the best all around CPU, but Apple won’t sell you that CPU- Apple hobbles both the 8 core and 10 core CPUs by downclocking them. The best balance is 8 cores 3.7 GHz or 10 cores 3.3 GHz because contention and overhead come to bear. If we assume that all cores are used, no memory or cache contention (impossible in any real-world task), then one computation goes as follows as to maximum computing power, which is almost never realistic for desktop computers:Ĩ cores 3.7 GHz = 29.6 GHz ~= 9.9 cores 3.0 GHz 8 cores 3.2 GHz = 25.6 GHz ~= 8.5 cores 3.0 GHz ( hobbled Apple offering) 10 cores 3.3 GHz = 33 GHz ~= 11.0 cores 3.0 GHz <= sweet spot 10 cores 3.0 GHz = 30 GHz ~= 10.0 cores 3.0 GHz ( hobbled Apple offering) 14 cores 2.5 GHz = 35 GHz ~= 11.7 cores 3.0 GHz 18 cores 2.3 GHz = 41.4 GHz ~= 13.8 cores 3.0 GHz SOFTWARE VENDORS: if you have multi-core software you want tested, contact Lloyd and provide a 4-CPU license (no demos, must allow 4 machines for simulataneous testing). For the 2017 iMac 5K, this is 48 watts, which is wonderful when running on battery power for 8 or 10 hours a day. One other test of serious practical interest to Lloyd is iMac Pro power consumption with screen lit up but the machine more or less idle. Possibly it is a pricing thing-one quality bin down with disabled/dead CPU cores and/or CPUs that did not make the full clock speed cut. It doesn’t look to be TPD (total power dissipation) since all the CPUs have the same TDP. It remains a mystery as to why Apple is using downclocked Intel Xeon W CPUs in the 2017 iMac Pro.
As well as a slew of Thunderbolt 3 tests. OWC has offered its lab facilities and the iMac Pro to test with, and there might be some bonus tests with faster CPUs, which could prove interesting. MPG will be testing the iMac Pro in very early January. Is the iMac Pro faster or slower than the 2017 iMac 5K? Yes. Need help deciding? Lloyd offers one-on-one consulting on choosing the best Mac and its best configuration, backup protocol, etc. SEND FEEDBACK Related: 2013 Mac Pro, CPU cores, iMac, iMac Pro, Mac Pro, memory
0 kommentar(er)
