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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by Francesco84[/i] [br]Origin Ver. 2023b and Service Release 1 (Select Help-->About Origin): Operating System: Windows 7 Hello to all, I would like to ask a question. I'm working with large data files (about 500MB). Each file consists of two columns with 25M rows. My PC is a multicore with 8 logical processors. I set the @IAS variable and while importing files the CPU usage is 100%. However, for other operations (such as data FFT or just change the format of the cells) the CPU is only used at about 14%. I would like to know if there are other variables to be set so that the CPU is used 100% also for other operations? Thank you, Francesco [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.