GFN-21 ........... ~5h/task, ~770 k PPD (sample size of 3)What would a 3070ti do on this ?
What about GFN-22 ?You need to configure your PrimeGrid preferences to allow only Nvidia GPU work, no CPU work (at the top of the PrimeGrid preferences page).
Further down on that page,
At the very bottom of the page, remember to click [Update Preferences].
- select only GFN-21= "Generalized Fermat Prime Search n=21 (GFN-21 or Genefer 2097152)" / "NVIDIA GPU" - "OpenCL" if you prefer moderate run time at the order of 5 hours.
- select only GFN-DYFL = "Do You Feel Lucky? (Genefer World Record Attempt)" / "NVIDIA GPU" - "OpenCL" if you prefer maximum PPD and can stomach the long task duration at the order of a day.
Afterwards, update the project in boincmgr or boinctasks.
I suggest you abort all already loaded CPU work as soon as you changed the prefs to GPU-only. The 7551 is ineffective at this due to its smallish AVX units, its internal multi-chip/multi-CCX structure, and comparatively small cache per CCX. "cpuGFN21" wants high FMA3 throughput, 8+ cores per task, and ideally >24 MB unsegmented CPU cache per each running task. (BTW, multiple cores per task cannot be configured at the PrimeGrid web preferences. An app_config.xml must be written for that, as detailed in the OP of the challenge thread. But as I said, Zen 1 is not going to work well at this.)
I didn't find completed GFN-22 results from an RTX 3070 Ti from which I could calculate PPD. However, I do know from RTX 3080 that GFN-22 takes 90% of the runtime compared to GFN-DYFL, but gives only 85 % of the PPD. Hence, it's not really worth it on this class of GPUs. Although its PPD is at least better than GFN-21.What about GFN-22 ?
At the beginning of the boinc event log, does it show the 3070 Ti both as a CUDA and as an OpenCL device? (It should.)Using 495 drivers, I still get computational error. I abort and update, and it loads another DYFL and same error. doing nothing now.
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