OverDrive® Processor

OverDrive® Processor Product Overview
Future OverDrive Processors
Socket Specifications
Performance
OverDrive® Processor Linecard
Additional OverDrive Processor Information

OverDrive® Processor Product Overview

The Intel OverDrive® processors are end-user processor upgrades designed for upgradable Intel486(TM) and Pentium® processor-based systems. OverDrive processors provide an increase in the overall performance of today's sophisticated and complex software applications.

Pentium® OverDrive® Processors for Pentium Processors

Pentium OverDrive Processors are now available for upgradable Pentium processor-based PC's. They are the ultimate PC upgrade because they accelerate all PC applications, are affordable, and offer easy single chip installation. Pentium OverDrive processors help users improve the performance of all software applications as well as increase their ability to harness the resources of the Internet. The product line includes:

The 120/133-MHz Pentium OverDrive Processor to upgrade 60/66-MHz Pentium processor-based systems with Socket 4.
The 125-MHz Pentium OverDrive Processor to upgrade 75-MHz Pentium processor based systems with Socket 5 or Socket 7.
The 150-MHz Pentium OverDrive Processor* to upgrade 90-MHz Pentium processor based systems with Socket 5 or Socket 7.
The 166-MHz Pentium OverDrive Processor* to upgrade 100-MHz Pentium processor based systems with Socket 5 or Socket 7.

*Pentium OverDrive processors for 90-MHz and 100-MHz systems will be available in May 1996.

Like the Pentium processor, the Pentium OverDrive processors feature:

Advanced (.35 micron) Pentium-processor technology
Superscalar architecture
64-bit data bus
Branch prediction
High-performance floating point unit
16Kbyte on-chip cache, (8Kbyte code, 8Kbyte data)

The Pentium OverDrive processor also includes added silicon and package features to ensure worry-free processor upgradability and compatibility to existing systems:

Pre-configured bus-to-core speed ratios for ease of installation. The end user does not need to change the system jumpers for the OverDrive processors. The BF signals are internally bonded to the proper ratio.
Integrated on-package fan/heatsink. The Pentium OverDrive processor fan/heatsink is designed to keep the package temperature within specifications provided the ambient temperature of the air entering the fan/heatsink does not exceed 45 degrees C.
On-package voltage regulation and voltage filtering (on-package capacitance). The 120/133-MHz Pentium OverDrive processor for 60/66-MHz Pentium processor-based systems has an on-package regulator to convert the 5V supply to the 3.3 volts necessary for the core. The 125/150/166-MHz Pentium OverDrive processors for 75/90/100-MHz Pentium processor-based systems have on-package voltage filtering that allows the Pentium OverDrive processor to run at either standard or VRE voltage specifications. The end user does not need to change the motherboard voltage to support the OverDrive processors.
Specifications developed and tested to support installed base.

Pentium OverDrive processors are not designed to upgrade systems with two processors. The system will not operate properly with two Pentium OverDrive processors installed.

OverDrive Processors for Intel486(TM) Processors

Pentium OverDrive processor:
Most Intel486 processor-based systems can be upgraded to Pentium processor technology with the Pentium OverDrive processor. This upgrade features Pentium processor superscalar architecture, a 32Kbyte enhanced on-chip cache memory and a fast math coprocessor unit. It supports 64 bit internal data transfers to cache while working seamlessly with the 32-bit Intel486 bus architecture. The Pentium OverDrive processor is the recommended upgrade option for upgradable IntelSX2(TM), IntelDX2(TM), Intel486 SX, and Intel486 DX processor systems with a 237 or 238 pin socket CPU-based systems. Two versions of the Pentium OverDrive processors are available: the 63-MHz Pentium OverDrive processors for 25/50-MHz systems and the 83-MHz Pentium OverDrive processors for 33/66-MHz systems.

IntelDX4(TM) OverDrive processors:
For those unable to upgrade with the Pentium OverDrive processor, the IntelDX4(TM) OverDrive processor is the recommended option for upgradable Intel486 processor-based PC's. It features Intel's speed tripling technology, along with an on-chip math coprocessor and enhanced 16Kbyte cache. Two versions of the IntelDX4 OverDrive processor are available for Intel486 SX and DX processor-based systems: the 75-MHz IntelDX4 OverDrive processors for 20/25-MHz systems and the 100-MHz IntelDX4 OverDrive processors for 33-MHz systems.

Future OverDrive Processors

Intel plans to offer future higher speed OverDrive processors for today's Pentium processor and Pentium Pro processor-based systems. Refer to the socket specifications for system design information.

For Pentium Processor-based system designs:

A future 180-MHz Pentium OverDrive processor to upgrade the 120-MHz Pentium processor-based Socket 7 systems*
A future 200-MHz Pentium OverDrive processor to upgrade the 133-MHz Pentium processor-based Socket 7 systems*

*These OverDrive processors can also be used to upgrade new 150 and 166-MHz upgradable Pentium processor systems for users desiring additional performance. For 150-MHz and 166-MHz systems, these upgrades will boost performance of integer applications up to 30%.

For Pentium Pro Processor-based system designs:

A future OverDrive processor upgrade for the Pentium Pro processor

There are no plans to offer an OverDrive processor based on Pentium Pro processor technology for the Pentium processor-based systems.

Socket Specifications

An OverDrive processor socket specification is developed in conjunction with the original processor definition. The socket specifications are included in the processor datasheets as a chapter on upgradability. The OverDrive processors are designed to meet the socket specifications.

For new Pentium processor designs, the OEM should design in Socket 7 for the maximum flexibility in upgrades. Socket 7 will permit the end user to upgrade to the highest performance Pentium OverDrive processor. Refer to the Pentium Processor 75/90/120/133 MHz datasheet, for the OverDrive Processor Socket Specification.

For Pentium Pro processors-based system designs, the OEM should design to the Socket 8 specifications. Refer to the Pentium Pro Processor at 150 MHz datasheet, Chapter 8 for the OverDrive Processor Socket Specification.

Performance

Intel OverDrive processors increase the speed and performance of all software applications. The iCOMP® Index shows how much processing power is gained by adding an OverDrive processor. To see the performance gained by adding an OverDrive processor running commonly used Business and Home software check out the performance report.

OverDrive® Processor Linecard

Product	Upgrade for:	Cache Description	CPUID	System Voltage	Bus Freq. / CPU	Max.Power/ Thermal
OverDrive®Processors for upgradable Intel486(tm) Processor-based Systems:
IntelDX4(TM) ODP (ODP=OverDrive Processor)	i486SX CPU systems: Sockets 1, 2, 3, and 168 or 169 pin LIF	16KByte - Unified Write-Through	148x or 048x	5.0V±5%, On-package Voltage Regulator	25 / 75 33 / 100	7.75W, Integrated 0.6" passive heatsink
IntelDX4 ODPR (ODPR=OverDrive Processor- Replacement)	i486DX CPU systems: Sockets 1, 2, 3 and 168 pin LIF	16KByte - Unified Write-Through	148x or 048x	5.0±5%, On-package Voltage Regulator	25 / 75 33 / 100	7.75W, Integrated 0.6" passive heatsink
Pentium® ODP	i486(TM) processor- based systems Sockets 2, 3	32KByte Dual 16KB Code cache - Write-Through 16KB Data cache - Write-Back	153x	5.0±5%, On-package Voltage Regulator	25 / 63 33 / 83	13 Watts, Integrated Fan/heatsink
Pentium OverDrive® Processors for upgradable Pentium Processor-based Systems:
120/133-MHz Pentium OverDrive Processor	60/66-MHz Pentium Processor Systems Socket 4	8KB Code cache 8KB Data cache, Write-Back	051x	4.75V-5.40V On-package Voltage Regulator	60 / 120 66 / 133	16 Watts Integrated Fan/heatsink
125/150/166- MHz Pentium OverDrive processor	75/90/100-MHz Pentium Processor Systems Socket 5 and 7	8KB Code cache 8KB Data cache, Write-Back	052x	3.135V-3.6V (STD and VRE Spec.) On-package Voltage Filtering	50 / 125 60 / 150 66 / 166	15 Watts Integrated Fan/heatsink
Future 150/180/200- MHz Pentium OverDrive processor	75/90/100/120/133- MHz Pentium Processor Systems Socket 7	TBA (To Be Announced)	154x	See Socket 7 Specification	50 / 150 60 / 180 66 / 200	See Socket 7 Specification
OverDrive®Processors for upgradable Pentium Pro Processor-based Systems:
Future OverDrive Processor	Pentium Pro Processor Systems, Socket 8	TBA	163x	See Socket 8 Specification	TBA	See Socket 8 Specification

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