Dell OptiPlex GX1 Dell OptiPlex GX1/GX1p Managed PC and OptiPlex NX1 Net PC S - Page 15

All four chassis configurations have the following similarities: The same system board. Identical operational characteristics (same BIOS, POST, memory, microprocessor, external I/O ports, and so on). Identical diagnostics, diagnostic beep codes, and diagnostic-screen error messages (see Chapters 1 through 3 and Appendix A). However, the OptiPlex NX1 computer has no built-in diskette drive and requires a special setup process to run the diskette-based diagnostics as described in Chapter 2. The features described in the following subsections are common to all chassis configurations. All systems in the OptiPlex GX1/GX1p and OptiPlex NX1 computer families incorporate the Pentium II microprocessor for improved operating speeds and overall performance. Some of the major enhancement features of the Pentium II microprocessor include internal 16-KB data and instruction caches, internal math coprocessor, and the MMX instruction set for high performance in complex multimedia and communications environments. The Pentium II microprocessor also uses a technique called single instruction, multiple data (SIMD), which permits processing data elements in parallel for additional system performance enhancement. The microprocessor is physically located in a single-edge contact (SEC) cartridge/heat sink assembly on the system board for ease of upgrading when faster processors are available. Contact Dell Computer Corporation for information about Dell-supported microprocessor upgrades. For additional performance, the OptiPlex GX1/GX1p and OptiPlex NX1 systems employ a secondary cache memory subsystem with a cache memory controller and 512 KB of pipeline-burst SRAM cache memory. The L2 cache SRAM is located in the SEC cartridge/heat sink assembly on the system board. System Overview 1-3