Congratulations on first place and achieving the 50 million DNA helix badge.
Ah yes, it had occurred to me to run a single task using nt 32 parameter for fun in dual box, if it had a GPU installed. Think it may not work too well though because of how the 2 separate CPUs interact with the memory and other resources. Kind of intra socket contention issues. Sometimes you can partly get around these issues causing slowdown of multithreaded CPU programs by running 2 program instances and allocating program threads/cores to a particular CPU using Task Scheduler or Process Lasso. However for GPU applications I think the lanes on one PCIe slot map to one CPU and another slot maps to other CPU. So you'd perhaps need 2 GPUs to utilise both CPUs.
Didn't think of turning off hyperthreading though, haven't wanted to use all 8 CPU "cores" on Skylake box because it's running warm enough just using 6 (X3 tasks with nt 2). But it may run a fair bit cooler running all 4 cores with hyperthreading off, might try it tomorrow.
However as you said when it comes to GPU applications rather than solely CPU applications, sometimes turning hyperthreading off gives little or no advantage. Plus without the elapsed time multiplier effect of running X4 tasks with nt 2 like you can with hyperthreading on, it may end up being more efficient by completing more tasks per day but actually get less daily credit. That's always irritating when a faulty credit scheme promotes inefficiency.
Gromacs is complaining of the inefficiency of not using -pin on (and -pinoffset for multiple jobs). Could try fixing threads to cores I suppose, haven't used Process Lasso for a while. Just tried 1 task with nt 7 and it completed in 71 minutes, now have cleaned heatsink of CPU a little plus also filters on case and am running 1 task at nt 8. GPU and CPU temps are warmish but acceptable, slightly less than when running 4 concurrent at nt 1. Afterburner GPU usage % graph line is very smooth and steady at 64% to 66%. Task Manager Details tab shows gmx.exe using 92% to 94% of CPU.
Probably will only be a tiny bit faster if at all than nt 7, but runtime will be multiplied by 8 instead of by 7. Think I'll leave it on that overnight as it seems stable. Dual box is crunching away on WCG without complaint.
Actually CreditNew has a history of wild and erratic spiking and dipping when being used with GPU applications. It has no effective mechanism to consistently compensate for the large differences in Runtime when used with inefficient GPU applications and the resulting concurrent type processing. Can't remember which projects, but quite a few had big trouble with CreditNew and had to hurriedly introduce fixed credit. Think that included either DNETC@HOME or Moo! Wrapper (or both!).
Even with CPU applications it can muck up. Aqua@Home had so much recurring strife with the incompatibility of CreditNew with their multithreaded CPU application causing massive credit spikes that they gave up and left BOINC completely. Plus CreditNew has a comparison feature that is supposed to compare with other projects and adjust the credit rate accordingly. When CreditNew was first used on WCG they were alarmed and dismayed that the credit rate was automatically increased to a reasonable rate and hurriedly disabled that feature as they are totally wedded to the unwholesome, inconsistent, illogical, unfair "reduce towards zero" credit philosophy.
So much so, that on WCG a recent architecture CPU will often have a credit rate that's similar or even less than a CPU architecture from years ago, even though efficency of more recent CPU architectures has increased greatly. They hate the whole idea of credit at WCG which is why they invented their colourful Runtime badges to ensure people with old, inefficient "boat anchor" CPUs could pretend they were doing a useful amount of work instead of basically just wasting power.
Gee I'm twitter and bisted sometimes. Never miss an opportunity to bag WCG's "war on credit" stinginess even though I often turn my bedroom into a bath of fire runnning 3 CPUs/35 cores on their projects to help cure diseases. Anyway, have a few Emeralds pending and will probably go for Zika Sapphire next, seeing as can't get many HS TB tasks at all. Maybe I too need to employ "old batchie" at the 3rd and 33rd minute every hour, haha.