You can try use this program NVIDIA BIOS Editor (NiBiTor) if you want to change the sign on message text & color, GPU & memory clocks, hidden features like SBA (Side Band Addressing) and much more.

NiBiTor is the original and defenitive BIOS tweaker that supports the latest NVIDIA graphics cards. NiBiTor allows graphics card enthusiasts to have full control over advanced features and functionality found on firmware of supporting cards.

Detailed BIOS information output

Device ID
BIOS Version
BIOS Date
Vendor
Core/Memory Clock display

2D Core/Memory Clock
3D Core/Memory Clock
Throttling Core/Memory Clock
Core Voltage display

2D Voltage
3D Voltage
Throttling Voltage
Memory Timings display
Product Identification
Ability to modify the several BIOS Parameters

Core Clock defined within the BIOS
Memory Clock defined within the BIOS
Core Voltage defined within the BIOS
Memory Timings defined within the BIOS
Temperature Settings defined within the BIOS
Fan Speed Settings defined within the BIOS
Specific Boot Settings

Graphics Card OEM and Advanced Signon Message
Monitor Specific Parameters
Graphics Card Initiation Settings
TV Mode Selection (NTSC/PAL)
Ability to check BIOS Integrity

BIOS Checksum Checking
BIOS Structure Checking

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