Dell OptiPlex 5090 Micro Form Factor: Statement of Volatility

Understanding System Data Volatility

This document details the volatility characteristics of components within the Dell OptiPlex 5090 Micro Form Factor. It distinguishes between volatile components, which lose data upon power removal, and non-volatile components, which retain data. Understanding these differences is crucial for data integrity and system configuration.

The Dell OptiPlex 5090 Micro Form Factor system board includes several non-volatile components that preserve data even when the system is powered off. This statement outlines these components and provides guidance on potential data loss scenarios and necessary actions.

Key Non-Volatile Components

Description	Reference Designator	Volatility Description	User Accessible	Remedial Action
Embedded Flash memory in embedded controller MICROCHIP DEC1515H-DO-I/Z2	U5	The two SRAM blocks in the DEC1515 total 256KB.	No	N/A
System BIOS and Video BIOS	U21	Non-volatile memory, 256 Mbits (32 MB) for basic boot operation, ePSA.	No	N/A
TPM Nuvoton NPCT750JA DYX	U40	28K bytes non-volatile memory located in the TPM module.	No	N/A
System memory SPD EEPROM	On memory DIMM(s)	Non-volatile EEPROM memory. 512 bytes. Stores memory manufacturer data and timing information.	No	N/A
USB CONTROLLER CYPD4125	U71	128 KB Flash and 8 KB SRAM	No	N/A
Hard drive	User replaceable	Non-volatile magnetic media, various sizes in GB.	Yes	Low level format.

ACPI Power States and Data Retention

The document also clarifies data retention across various Advanced Configuration and Power Interface (ACPI) power states:

S0 (Working State): Dynamic RAM is maintained and accessible by the processor.
S1 (Low Wake-Up Latency): System context is maintained; hardware retains all system contexts.
S3 (Suspend to RAM / Stand-by): Dynamic RAM is maintained. Supported by OS and peripherals (e.g., Linux, Windows 10).
S4 (Suspend to Disk / Hibernate): Dynamic RAM is not maintained. System context is written to non-volatile storage.
S5 (Soft Off): No power. No context is saved. All cache and memory data is lost, requiring a full boot.

The Dell OptiPlex 5090 Micro Form Factor supports states S0, S1, S3, S4, and S5.

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Understanding System Data Volatility

Key Non-Volatile Components

ACPI Power States and Data Retention

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