Epyc Rome vs Xeon

bramv101 · October 8, 2020, 08:59

I would appreciate some advice for following build, wether to go for Xeon or EpycRome

workstation under desk (so too much noise is an issue)
WIN 10 PRO license available
dual vs single socket (correct to assume dual socket opens more options in terms of mem bandwidth?)
bang for buck Epyc 7402 vs 7551 vs .. - am i right to assume that the ratio of memory channels vs cores has a sweet spot and that this ratio is the main driver for CPU selection? what is the currently the more optimal CPU to get
Max 2 jobs wiill run in parallel (typical cell count of 1 job is 30e6 cells external aero - once and a while heat transfer and DEM will be run
licenses excluded from build

small PS: Threadripper PRO seems to be an option vs EPYC according to https://www.servethehome.com/amd-thr...epyc-or-wepyc/

trampoCFD · October 8, 2020, 20:58

Hi Bram,
1/Dual socket Epyc Rome is the go. Please read the other HPC threads in the hardware forums.
2/a 2x 32 cores Epyc Rome workstation is 40% cheaper than a 64 cores threadripper pro workstation.
3/Do you use STAR-CCM+?

Best regards,
gui@trampoCFD

sailing · December 16, 2020, 14:10

Hi Gui,

I came across this thread and was wondering how the answer changes if one of the main use cases is Star-CCM+?

October 8, 2020, 08:59	Epyc Rome vs Xeon	#1
bramv101 Member TonyD Join Date: Apr 2009 Posts: 85 Rep Power: 17	I would appreciate some advice for following build, wether to go for Xeon or EpycRome workstation under desk (so too much noise is an issue) WIN 10 PRO license available dual vs single socket (correct to assume dual socket opens more options in terms of mem bandwidth?) bang for buck Epyc 7402 vs 7551 vs .. - am i right to assume that the ratio of memory channels vs cores has a sweet spot and that this ratio is the main driver for CPU selection? what is the currently the more optimal CPU to get Max 2 jobs wiill run in parallel (typical cell count of 1 job is 30e6 cells external aero - once and a while heat transfer and DEM will be run licenses excluded from build small PS: Threadripper PRO seems to be an option vs EPYC according to https://www.servethehome.com/amd-thr...epyc-or-wepyc/

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October 8, 2020, 20:58		#2
trampoCFD Member Guillaume Jolly Join Date: Dec 2015 Posts: 63 Rep Power: 10	Hi Bram, 1/Dual socket Epyc Rome is the go. Please read the other HPC threads in the hardware forums. 2/a 2x 32 cores Epyc Rome workstation is 40% cheaper than a 64 cores threadripper pro workstation. 3/Do you use STAR-CCM+? Best regards, gui@trampoCFD

December 16, 2020, 14:10		#3
sailing New Member R Join Date: Dec 2020 Posts: 1 Rep Power: 0	Hi Gui, I came across this thread and was wondering how the answer changes if one of the main use cases is Star-CCM+?