{"id":36180,"date":"2019-06-26T15:11:54","date_gmt":"2019-06-26T15:11:54","guid":{"rendered":"\/forum\/forums\/topic\/cfd-workstation-ram-size-cores-number\/"},"modified":"2019-06-26T15:11:54","modified_gmt":"2019-06-26T15:11:54","slug":"cfd-workstation-ram-size-cores-number","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/cfd-workstation-ram-size-cores-number\/","title":{"rendered":"CFD Workstation – RAM size & CORES number"},"content":{"rendered":"

Hi!<\/p>\n

<\/p>\n

      I need to select a good workstation for CFD modeling in ANSYS for my Lab to buy. <\/p>\n

<\/p>\n

I understand that there’s 25-40% decrease in simulation performances if all memory slots are not filled with the same amount of memory. – The specs of a DELL workstation option are listed below. I have 2 quick questions related to RAM choice:<\/p>\n

<\/p>\n

1. Are 64GB (8x8GB) or 96GB (4x16GB + 4x8GB additional sticks) valid options? <\/p>\n

<\/p>\n

Or is it worth to consider reducing the cores number (for instance, 8C instead of 10C) and invest in larger RAM (8x16GB=128GB, for instance)?<\/p>\n

<\/p>\n

2. Do I really need 192GB of RAM to match the minimum memory requirement?<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

Budget is ~ $6-7k. The workstation is needed for time-dependent, rigid-wall simulations (2M element mesh). As reference, I used to run these simulations on *2 CPU of 8 cores each<\/span> (DELL Intel Xeon CPU 2650 0 @ 2.0 GHz), 64 GB of RAM, and 2 HHDs of 2TB each*. – The simulation would run for 2-3cycles in 4-6days.<\/p>\n

<\/p>\n

Thanks a lot in advance for your help!<\/p>\n

<\/p>\n

____________________________________<\/p>\n

<\/p>\n

Full specs (DELL Precision 5820 Tower)<\/em>:<\/span><\/strong><\/p>\n

<\/p>\n

Intel Xeon W-2115 (3.3GHz, 4.5 GHz Turbo, 10 Cores, 13.75MB Cache)<\/span><\/em><\/p>\n

<\/p>\n

64-96 GB RAM<\/span><\/em><\/p>\n

<\/p>\n

INVIDIA video card P4000 (8GB, 4 Displayport 1.4)<\/span><\/em><\/p>\n

<\/p>\n

Operating System: Windows 10 Pro<\/span><\/em><\/p>\n

<\/p>\n

Precision 5820 Tower 950 Chassis<\/span><\/em><\/p>\n

<\/p>\n

Hard Drive Controllers: Integrated Intel AHCI SATA chipset controller (8x 6.0Gb\/s), SW RAID 0,1,5,10<\/span><\/em><\/p>\n

<\/p>\n

Hard Drive: 2.5” 512GB SATA SSD<\/span><\/em><\/p>\n

<\/p>\n

2nd<\/sup> Hard Drive: 2.5” 1T SATA SSD<\/span><\/em><\/p>\n

<\/p>\n

3rd<\/sup> Hard Drive: 2.5” 1T SATA SSD<\/span><\/em><\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

*edited for <\/span>clarity<\/span><\/span> – apologize for confusion*<\/span><\/p>\n","protected":false},"template":"","class_list":["post-36180","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["8352"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0"],"_btv_view_count":["8881"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["36180"],"_bbp_forum_id":["27796"],"_bbp_engagement":["199","164850","182568","184611","240811"],"_bbp_voice_count":["5"],"_bbp_reply_count":["9"],"_bbp_last_reply_id":["228451"],"_bbp_last_active_id":["228451"],"_bbp_last_active_time":["2021-11-18 09:58:00"]},"test":"stacylab"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/36180","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/36180\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=36180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}