Preliminary Information

AMD Athlon™ XP Processor Model 8 Data Sheet

25175H— March 2003

Table 26. FID[3:0] Clock Multiplier Encodings

FID[3:0]2

Processor Clock to SYSCLK Frequency Ratio

0000

11

0001

11.5

 

 

0010

12

 

 

0011

12.51

0100

5

 

 

0101

5.5

 

 

0110

6

 

 

0111

6.5

 

 

1000

7

 

 

1001

7.5

 

 

1010

8

 

 

1011

8.5

 

 

1100

9

 

 

1101

9.5

 

 

1110

10

 

 

1111

10.5

Notes:

1. All ratios greater than or equal to 12.5x have the same FID[3:0] code of 0011b, which causes the SIP configuration for all ratios of 12.5x or greater to be the same.

2. BIOS initializes the CLK_Ctl MSR during the POST routine. This CLK_Ctl setting is used with all FID combinations and selects a Halt disconnect divisor and a Stop Grant disconnect divisor. For more information, refer to the AMD Athlon™ and AMD Duron™ Processors BIOS, Software, and Debug Developers Guide, order# 21656.

The FID[3:0] signals are open-drain processor outputs that are pulled High on the motherboard and sampled by the chipset to determine the SIP (Serialization Initialization Packet) that is sent to the processor. The FID[3:0] signals are valid after PWROK is asserted. The FID[3:0]signals must not be sampled until they become valid. See the AMD Athlon™ System Bus Specification, order# 21902 for more information about Serialization Initialization Packets and SIP protocol.

The processor FID[3:0] outputs are open-drain and 2.5-V tolerant. To prevent damage to the processor, if these signals are pulled High to above 2.5 V, they must be electrically isolated from the processor. For information about the FID[3:0] isolation circuit, see the AMD Athlon™ Processor-Based Motherboard Design Guide, order# 24363.

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Pin Descriptions

Chapter 11

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AMD 8 manual FID30 Clock Multiplier Encodings

8 specifications

AMD's Ryzen 8000 series, commonly referred to as AMD 8, represents a significant leap in performance and efficiency, leveraging advanced technologies that cater to gamers, content creators, and enterprise users alike. With a continued focus on the Zen architecture, the Ryzen 8000 processors enhance performance per watt, delivering increased efficiency without compromising on power.

One of the standout features of AMD 8 is its adoption of the 5nm process technology. This innovation allows for a higher density of transistors, resulting in improved performance metrics and reduced power consumption. The smaller node size not only enhances clock speeds but also ensures that the chips generate less heat, making thermal management easier for system builders.

AMD has introduced a new architecture with the Ryzen 8000 series known as Zen 5. This architecture brings improved instructions per cycle (IPC) over its predecessors, leading to faster performance in both single-threaded and multi-threaded workloads. Gamers will benefit from higher frame rates, while professionals in fields such as video editing and 3D rendering can expect noticeable improvements in rendering times.

Another key technology in the AMD 8 lineup is the integration of AMD's next-generation RDNA graphics architecture. This allows for enhanced graphics performance in systems without dedicated GPU hardware. The combination of advanced graphics and CPU capabilities provides a more versatile platform for casual gamers and users with less demanding graphical needs.

Support for PCIe 5.0 is a game changer for the AMD 8000 series, offering double the bandwidth of its predecessor, PCIe 4.0. This feature allows for faster data transfer rates with compatible SSDs and graphics cards, ensuring that users can take full advantage of the latest storage technologies.

Additionally, AMD's Infinity Cache has made its way into the Ryzen 8000 series, further enhancing memory bandwidth. This technology reduces latency and increases efficiency by caching frequently accessed data closer to the processor.

In terms of connectivity, the Ryzen 8000 models come equipped with Wi-Fi 7 and Bluetooth 5.2, providing ultra-fast wireless connections that are essential for modern gaming and streaming experiences.

In summary, AMD's Ryzen 8000 series, or AMD 8, is designed for maximum performance and efficiency. With its advanced 5nm technology, enhanced Zen 5 architecture, integrated RDNA graphics, PCIe 5.0 support, Infinity Cache, and state-of-the-art connectivity features, it sets a new standard for processors in its class, making it a top choice for both gamers and professionals.