https://forums.autodesk.com/t5/cfd-forum/how-does-the-speed-of-ram-affect-the-calculation-time-ddr5-vs/m-p/11620250#M1466 <P>If you make a test, let's try to turn off hyper-threading in the BIOS and in CFDConfig2exe( installation location).</P> <P>If that does not help try to reduce the amount of cores in the Solver Computers.</P> Wed, 14 Dec 2022 15:55:16 GMT karol.suchon 2022-12-14T15:55:16Z https://forums.autodesk.com/t5/cfd-forum/how-does-the-speed-of-ram-affect-the-calculation-time-ddr5-vs/m-p/11595680#M1463 <P><SPAN>Hello! i want to upgrade my pc. I can’t decide between i7 13700 and i9 13900. Also, will the speed of the RAM affect the calculation speed. ddr4 or ddr5. What would you advise?</SPAN></P> Wed, 14 Dec 2022 18:41:35 GMT https://forums.autodesk.com/t5/cfd-forum/how-does-the-speed-of-ram-affect-the-calculation-time-ddr5-vs/m-p/11595680#M1463 Maks_Maks 2022-12-14T18:41:35Z https://forums.autodesk.com/t5/cfd-forum/how-does-the-speed-of-ram-affect-the-calculation-time-ddr5-vs/m-p/11597819#M1464 <P>Hello,</P> <P>the Ram type rather will not have a huge influence on the calculation speed. The most important one is a processor.</P> <P>Overall look for a processor with a lesser amount of cores and high frequency on a single core( there is no reason to put more than 8 cores, the software will not get a huge boost for that).</P> <P>So from these two i7 will be a better option. Especially the i9 has E-Cores which are created for the background processes which work on very low frequency and for the processors the Solver application is the background process.</P> <P>So after buying i9 the first thing you need to do is disable the E cores in the BIOS. So you cannot use the feature for which you pay.</P> <P>BR</P> <P>Karol&nbsp;</P> Mon, 05 Dec 2022 10:38:27 GMT https://forums.autodesk.com/t5/cfd-forum/how-does-the-speed-of-ram-affect-the-calculation-time-ddr5-vs/m-p/11597819#M1464 karol.suchon 2022-12-05T10:38:27Z https://forums.autodesk.com/t5/cfd-forum/how-does-the-speed-of-ram-affect-the-calculation-time-ddr5-vs/m-p/11620206#M1465 <P>Hi!&nbsp;Today I received a new computer windows 11 13700k 64gb. at first it performed the calculation 100 times slower than the old PC. I disabled e-cores in bios. The PC began to count faster, but still 2 times slower than the old computer on windows 10 4770k 16GB. Please tell me what to set</P> Wed, 14 Dec 2022 15:44:26 GMT https://forums.autodesk.com/t5/cfd-forum/how-does-the-speed-of-ram-affect-the-calculation-time-ddr5-vs/m-p/11620206#M1465 Maks_Maks 2022-12-14T15:44:26Z https://forums.autodesk.com/t5/cfd-forum/how-does-the-speed-of-ram-affect-the-calculation-time-ddr5-vs/m-p/11620250#M1466 <P>If you make a test, let's try to turn off hyper-threading in the BIOS and in CFDConfig2exe( installation location).</P> <P>If that does not help try to reduce the amount of cores in the Solver Computers.</P> Wed, 14 Dec 2022 15:55:16 GMT https://forums.autodesk.com/t5/cfd-forum/how-does-the-speed-of-ram-affect-the-calculation-time-ddr5-vs/m-p/11620250#M1466 karol.suchon 2022-12-14T15:55:16Z https://forums.autodesk.com/t5/cfd-forum/how-does-the-speed-of-ram-affect-the-calculation-time-ddr5-vs/m-p/11620682#M1467 <P>I specified 8 cores in the cfd settings and the PC began to count 3 times faster than the old one. it's better than I expected. after that I turned off hyperthreading in the BIOS, but I didn’t see the result, even maybe a little bit slower, I turned it on again. Thank you so much</P> Wed, 14 Dec 2022 18:40:05 GMT https://forums.autodesk.com/t5/cfd-forum/how-does-the-speed-of-ram-affect-the-calculation-time-ddr5-vs/m-p/11620682#M1467 Maks_Maks 2022-12-14T18:40:05Z