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-   -   i7-3820 CPU compared to my old E6300 (https://www.cfd-online.com/Forums/hardware/117967-i7-3820-cpu-compared-my-old-e6300.html)

greenleader May 18, 2013 09:40

i7-3820 CPU compared to my old E6300
 
My new PC:

Intel Core i7 Sandy Bridge 4-core 3.6GHz
Asus P9X79 LE LGA2011 ATX Motherboard
G.Skill 16GB Kit (4x4GB) DDR3 Ripjaws Z C11 2133MHz RAM
Intel 520 Series 120GB 2.5" SSD SATA3 550/500

It runs about 7.5 times faster than my old machine which was:
Intel Core 2 Duo E6300 2-core 1.86GHz
6GB DDR2 RAM
Dell motherboard

If I turn hyper threading on in the 3820, (ie 8-cores) its about 10% faster than with it off (4-cores).

I ran the same openFoam model on both machines - it had 2.5 million cells, 240 iterations to converge in 1 hour (running SIMPLE). On the old machine this took about 7.5 hours.

Thanks for the comments on the forum which were helpful in deciding what to buy.


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