Dell OptiPlex GXa Service Manual - Page 15
Chassis Similarities, Standard Features, Pentium II Microprocessor, Secondary L2 Cache - bios
View all Dell OptiPlex GXa manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 15 highlights
Chassis Similarities All four chassis configurations have the following similarities: • Use the same system board (OptiPlex GXa systems can use either the stan- dard or EM system board; the OptiPlex NX systems use the EM 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 NX computer has no built-in diskette drive and requires a special setup to run diskette-based diagnostics as described in Chapter 2. Standard Features The features described in the following subsections are common to all chassis configurations. However, some of the features differ slightly, depending on which version of the system board is installed (standard or enhanced manageability version). Where differences occur, they are marked in the paragraph titles. Pentium II Microprocessor All systems in the OptiPlex GXa and OptiPlex NX 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. Secondary L2 Cache For additional performance, the OptiPlex GXa and OptiPlex NX 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