Intel 281809-003 manual Lpx Form Factor, Advanced/RH Motherboard dimensions

LPX FORM FACTOR

The Advanced/RH motherboard is designed to fit into a standard LPX form factor chassis. Figure 2 illustrates the mechanical form factor for the Advanced/RH. The Advanced/RH LPX form factor does adhere to the standard LPX guidelines in that the outer dimensions are 13” x 9”. Location of the I/O connectors, riser slot, and mounting holes are in strict compliance with the LPX specification. However, if business audio is selected by an OEM, a slight modification to the OEM’s chassis may be necessary to accept the audio jacks on the motherboard.

13.0

11.375

5.875

0.375		0.219
0.0
0.0		9.0
0.35	3.906	7.500
		8.8125
		OM04271

Figure 2. Advanced/RH Motherboard dimensions

CPU

The Advanced/RH LPX motherboard is designed to operate with 3.3 volt Pentium processors. The 3.3 volt power is provided by a patented on-board voltage regulator circuit. An on-board jumper enables use of VRE specified processors. The voltage regulator provides the required voltage for the processor from the 5 volt output of a standard power supply. Processors which run internally at 75, 90, 100, 120, 133, 150 and 166 MHz, and have iCOMP® ratings of 615, 735, 815, 1000, 1110, 1176 and 1308 respectively are supported. Future Pentium processors will also be supported.

The Pentium processor maintains full backward compatibility with the 8086, 80286, Intel386™ and Intel486™ processors. It supports both read and write burst mode bus cycles, and includes separate 8 KB on-chip code and data write-back caches. Also integrated into the Pentium processor is an advanced numeric coprocessor which significantly increases the speed of floating point operations, while maintaining backward compatibility with the Intel486DX™ math coprocessor and complying to ANSI/IEEE standard 754-1985.

Advanced/RH Technical Product Specification ∙ Page 8