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AMD FX Processors Unleashed | a Guide to Performance Tuning with AMD OverDrive and the new AMD FX Processors

10 AMD “Scorpius” platform – Performance Tuning Suggestions CPU Core Clock Performance Tuning CPU core clock is the most important item to adjust fo

11 The key settings in the Windows® XP, Windows Vista® or Windows 7® operating system to adjust before overclocking the CPU: • Close

12 CPU NorthBridge Performance Tuning The CPU NorthBridge (CPU NB) clock speed determines the efficiency and bandwidth capacity of the Memory contr

13 Figure 7: AMD OverDrive™ utility HT ref. clock slider 5) Run a stability test before increasing the HT ref. clock to another level 6) Adjust

14 CPU NB performance tuning through the BIOS menu: 1) Set the CPU NB clock speed up to the next available value (example: if 1800MHz / x9 is the

15 Memory Performance tuning – AM3+ / DDR3 PLEASE NOTE THAT THE AMD PRODUCT WARRANTY DOES NOT COVER DAMAGES CAUSED BY RUNNING COMPONENTS OUTSIDE OF

16 Advanced Memory tuning examples: The following BIOS settings may improve the Memory performance tuning margin and enable operation at the high

17 Figure 10: Example settings for DDR3-2133 memory clock mode (2 DIMMs, one DIMM per channel) The following memory timing fine tune parameters th

18 HyperTransport™ (HT) reference clock HT reference clock value has no direct impact on system performance. Therefore the maximum amount of HT re

19 AMD “Scorpius” Platform Technology – Performance Tuning Targets The following table lists some possible results for an unlocked AMD FX-81

2 Disclaimer The information presented in this document is for informational purposes only and may contain technical inaccuracies, omissions and ty

20 ATTRIBUTION © 2011 Advanced Micro Devices, Inc. All rights reserved. AMD, the AMD Arrow logo, ATI, the ATI logo, , AMD OverDrive and combinati

3 Introduction Systems based on the platform technology codenamed “Scorpius” may be tuned to deliver added system performance. The AMD FX™ C

4 Glossary of Terms HyperTransport™ Reference Clock (HT ref. clk): The base clock for various clock domains on the AMD “Scorpius” platfo

5 Glossary of Terms – continued CPU / CPU NB Voltage OFFSET: Most AMD “Scorpius” platform technology motherboards have a BIOS option that allows Vo

6 AMD OverDrive™ utility The AMD OverDrive™ utility is a comprehensive utility for performance tuning, system monitoring and testing.

7 Figure 1, presented above shows all the available clock/voltage tuning options available in the AMD OverDrive™ utility. The processor, north

8 Memory Tuning Figure2: AMD OverDrive™ utility Memory Tuning Memory timing adjustments (1) The items circled with red color can directly affect

9 AMD OverDrive™ utility Stability Test The AMD OverDrive™ utility features an impressive system stability assessment. The “Stability Test