CHEMCAD is considered very fast by most users. Users with extremely complicated flowsheets sometimes want more power from their computer. Examples where users might want to maximize their computer power are large hydraulic (pipe and node) flowsheets, complicated CC-Dynamics flowsheets, and flowsheets which are used online and controlled by a different program.
First, make sure to use the latest version of CHEMCAD. During the development of CHEMCAD 6, we improved calculation speed for CC-Dynamics, distillation columns, and recycle loops. Using the latest version of CHEMCAD allows you to take advantage of algorithm improvements that may have occurred.
Computer specifications which affect CHEMCAD:
Processor: The speed of processor is the most important factor for CHEMCAD calculation speed. In our tests, a "server grade" CPU will run CHEMCAD faster than a Desktop with faster clock speed. Multiple cores will not significantly improve calculation speed.
Operating System: CHEMCAD is not optimized for 64bit OS. A 64bit OS
Memory: The more RAM memory you have, the faster Windows can perform. We recommend use of 4GB of RAM on a 32 bit OS, and 8+ on a 64bitOS (we do not expect performance gains from additional memory).
Hard Drive: We have anecdotal reports of performance gains from solid state device (SSD) drives. These drives certainly start Windows faster. Chemstations does not believe an SSD drive will significantly outperform an equivalent Hybrid or tradtional hard drive. Earlier versions of CHEMCAD were affected by Hard Drive speed.
Version of Operating System: In general, the newest version of Windows with all updates applied performs best.