HP Vectra XM 5/xxx HP Vectra XM 5/xxx Series 3, Familiarization guide - Page 9

1 Product Overview and Features Product Features Microprocessor The Pentium microprocessors used in the HP Vectra XM 5/xx series 3 use internal clock multiplication, similar to that used by the 486 DX2 processor. The microprocessor's internal clock is a multiple of the system clock. The Pentium 75 and 90 MHz processor multiply the 50 and 60 MHz system clock by a factor of 1.5. The Pentium 120 MHz processor doubles the 60 MHz system clock. These new Pentium processors are powered by a power source of 3.3 V. The previous generation of Pentium processors, Pentium 60 MHz and 66 MHz, used a 5 V power source. The two generations of processors are not pin compatible. Other current and future Intel processors based upon the 66 MHz system clock include the Pentium 100 MHz and the Pentium 133 MHz. These processors are not available on the HP Vectra XM 5/xx series 3 platform at the time of printing. Cache Memory The microprocessor has two 8 KB first-level caches: one for the instruction codes and the other for data. The HP Vectra XM 5/xx series 3 PC has 256 KB of second-level cache memory, which is soldered onto the system board. DRAM Main Memory Modules The HP Vectra XM 5/xx series 3 PC has six sockets on the system board. 8 MB (two 4 MB SIMMs) or 16 MB (two 8 MB SIMMs) of memory is supplied as standard, expandable to 192 MB. Each pair of sockets forms a bank. When two memory modules are installed within the same bank, it is recommended that they have the same size. The PCs use 70 ns, 32-bit wide, memory modules. The memory upgrades available are: Ì 4 MB, 32-bit, 70 ns (D2690A) or 4 MB, 36-bit, 70 ns (D2974A) Ì 8 MB, 32-bit, 70 ns (D2691A) or 8 MB, 36-bit, 70 ns (D2975A) Ì 16 MB, 36-bit, 70 ns (D2297A) Ì 32 MB, 36-bit, 70 ns (D2298A) System ROM The PC has a system ROM that uses flash EEPROM technology. The flash ROM can be updated with the latest firmware using the HPInit program (HPINIT.EXE) supplied with the firmware upgrade. 5