Duron Spitfire Overclocking

The Duron Spitfire offers essentially the same overclocking potential as the Athlon Thunderbird at equivalent clock ratings. The only appreciable difference is improved power efficiency for the Duron, about 80 to 90% better than the Thunderbird. The difference is derived from a smaller transistor count due to the smaller Level 2 cache of the Duron architecture. Accordingly, the Spitfire requires a marginally lower 1.60 core voltage.

All other concerns are the same for both processors. The maximum thermal rating of 90° Celsius applies to all Duron Spitfire processors. The maximum "safe" core voltage of the Duron Spitfire is 1.85 volts, the same as that for the Thunderbird. Each chip is nearly identical to its Thunderbird counterpart in both average and peak overclocking potential.

Table 7-68: Athlon Duron Spitfire Specifications
Processor Family	Model Name	AMD Duron Spitfire

	Performance Rating	550 – 950 MHz
	Generation	Seventh: 80686 IA-32
Operational Rates	L1 Cache Speed	1.0x Core Rate
	L2 Cache Speed	1.0x Core Rate
	Front-side Bus Speed	100 MHz (200 DDR)
	Multiplier Ratio	5.5x – 9.5x (14.0x Max)
Physical Design	Interface Packing	462-Pin Socket A
	Core Die Size	.18 micron, 100 mm
	Transistor Count	25 Million
	Voltage Interface	Split Core and I/O
	Core Voltage	1.6 volts
	Power Consumption	18.9 – 37.2 watts
	Maximum Power	21.1 – 41.5 watts
Architectural Design	Core Technology	OOO and Speculative Execution RISC
	Register Support	Integer = 32 bit
		Floating-Point = 80 bit
		MM = 64 bit
	Execution Units	3 × IEU
		3 × AGU
		3 × FP
	Data Bus Width	64 (+8) bit
	Max Memory Support	Physical = 16 Gigabyte
		Virtual = 64 Terabyte
	Multi-Processor Support	SMP via EV6 Bus
	Level 1 Code Cache	64 KB 2-way
	Level 1 Data Cache	64 KB 2-way
	Level 2 Cache	64 KB Exclusive
	Pre-fetch Queue	16 Byte
	Static Branch Prediction	Supported
	Dynamic Branch Prediction	2048 Entry
	RSB Branch Prediction	12 Entry
	Floating-Point Processor	Integrated
	Multimedia Extensions	MMX, 3DNow!, Extended 3DNow!