CPU usage in ANSYS

[Danyalkid]

I have 3.8 GHz processor with 4 GB RAM and SCSI hard drive with 25 GB empty space computer. But when I do CFD analysis in ANSYS It only use 50% of CPU and less than 2 GB RAM. How to make it use most of the available CPU power and RAM. Page file is set at 8 GB.

I will appreciate any help.

Thanks!

 

[TGS4]

What's your OS? Which CFD package are you using?

 

[Danyalkid]

I am using Window XP Service Pack 2 and Flotran in ANSYS.

 

[TGS4]

In 32-bit Windows XP, you are not going to be able to have Windows assign more than 2GB of memory (physical or virtual) to any one process (unless you have the /3GB switch turned on when you load the OS). And, the total amount of memory you can use is 4GB. These are real limits on the 32-bit operating system. So, your 8GB page file is useless.

I suspect that the solution is paging to temporary files on the HD, which results in only 50% CPU usage. There's only one solution (ok - maybe two...) which is use a 64-bit operating system - either Windows or Linux. Unfortunately, unless your computer is 64-bit capable, this is going to mean new hardware.

Check with your local ASD regarding the availability of 64-bit Flotran in Windows - I use CFX, so I wouldn't know.

Sorry, but your hardware/OS is pretty much max-ed out.

 

[Danyalkid]

Thanks! Seems like I am stuck with this.