Code: CPU 2x E5-2690v4 2x E5-2690v4 i7-6950X i7-4960X E3-1245v3 i7-4900MQ Phenom II X4 905e clock 3.2 GHz 3.2 GHz 4.0 GHz 4.5 GHz 3.6 GHz 3.15 GHz 2.5 GHz ------------------------------------------------------------------------------------------------------------------ mean runtime/WU 7194 s 7242 s 5602 s 5479 s 6911 s 7123 s 10719 s min runtime/WU 6696 s 6772 s 5410 s 5249 s 6494 s 6762 s 10464 s max runtime/WU 7957 s 7984 s 5987 s 5835 s 7584 s 7373 s 11069 s COV 0.059 0.055 0.026 0.024 0.048 0.022 0.021 ------------------------------------------------------------------------------------------------------------------ normalized runtime 22'900 23'200 22'400 24'700 24'900 22'400 26'800 ------------------------------------------------------------------------------------------------------------------ concurrent tasks 56 56 18 12 8 8 4 WUs/day 673 668 278 189 100 97 32 credits/day 367'000 365'000 152'000 103'344 55'000 53'000 18'000

actual average processor frequency during the GCW sieve multitask workload​

mean runtime/WU (s), multilplied by clock (GHz), i.e. runtime scaled to 1.0 GHz; lower is better​

WUs/day multiplied by the average credits/WU, which is slightly more than 546​

My actual production in the ongoing Isaac Newton's Birthday Challenge will be lower than the sum of these machines. Some of them have to take breaks from the race periodically.

The two i7-X processors are overclocked, but I checked that there are no invalid returns.

The 6950X has got 20 logical cores but only 18 are being employed for PrimeGrid. Two remain for F@H.

The E3-1245v3 could be a few percent faster; there is a mixed workload on it.

Normalized to 1.0 GHz, the speed per core of the Phenom II is not so far behind the other CPUs. But then again, it runs only 1 task per physical core (no HT), all others run 2 tasks per physical core.

Edit August 19: added a table of contents of this thread, per PrimeGrid subproject

Table of contents:A method for testing without the influence of WU variability is described in post #44 ------------Here are somestats from the CPU-only "Generalized Cullen/Woodall (Sieve) 1.00" application. Runtimes were taken from the latest 20 valid tasks per machine.Remarks:------------