32 Optimizing Pe r for mancew w w . d e l l . c o m | s u p p o r t . d e l l . c o mIntel® Performance Acceleration TechnologyYour Dimension™ XPS computer is equipped with the Intel ® 875P chipset, which utilizesPerformance Acceleration Technology (PAT). PAT is designed to optimize performance byreducing the latency between DDR 400 memory and 800 front-side bus processors, andhelps provide high performance to meet the requirements for today’s demanding software.DDR Memory and Processor Front-Side BusThe performance of your computer’s DDR memory depends on the type of memoryinstalled and the clock speed of your processor. The following table indicates the memoryperformance resulting from different combinations of memory and front-side bus:For information on installing memory, see page 86. For information on the type of memorysupported by your computer, see "Memory" on page 120.Hyper-ThreadingNOTE: Hyper-Threading is supported only on computers that have 3.06-GHz (or higher)microprocessors installed.Hyper-Threading is an Intel ® technology that can enhance overall computer performanceby allowing one physical microprocessor to function as two logical microprocessors, capableof performing certain tasks simultaneously. It is recommended that you use the Microsoft ®Windows ® XP operating system because Windows XP is optimized to take advantage ofHyper-Threading technology. While many programs can benefit from Hyper-Threading,some programs have not been optimized for Hyper-Threading and may require an updatefrom the software manufacturer. Contact the software manufacturer for updates andinformation about using Hyper-Threading with your software.Memory type 800 front-side busprocessor533 front-side busprocessorDDR 400 (PC3200) performs at 400 MHz performs at 333 MHzDDR 333 (PC2700) performs at 320 MHz performs at 333 MHzG0550bk1.book Page 32 Thursday, July 10, 2003 1:55 PM
