775i65gv - Pentium Extreme Edition 955 bios mod request

[shahbai]

Hello

I have an asrock 775i65gv motherboard with official bios 2.40 version. Anyone has the bios mod for this motherboard for support Pentium D Extreme Edition 955 (Presler-65nm)?

motherboard link: https://www.asrock.com/MB/Intel/775i65GV/index.asp
similar motherboard link that support Pentium D 955 cpu: https://www.asrock.com/MB/Intel/775i65G/index.asp

please help me.

[DeathBringer]

Post screenshots of first (CPU) & third (Mainboard) tabs of CPU-Z with supported CPU.
Tell sSpec of your Pentium D. Explain exactly what happens when you try to boot with it.

[shahbai]

Sspec is SL94N -- http://www.cpu-world.com/CPUs/Pentium_Ex...3955).html

I'm going to buy this processor and not yet installed on the system. The manufacturer says the processor is not supported by the motherboard.

[DeathBringer]

Make current BIOS backup by Universal BIOS Backup ToolKit 2.0

[shahbai]

Make current BIOS backup by Universal BIOS Backup ToolKit 2.0

ok , I did do it.

Download Link:

https://ufile.io/6d2t8

[DeathBringer]

How you did flash latest BIOS? By native AsrUBios.exe?
What was CPU installed when BIOS flashed?

[shahbai]

I do not know.
When I bought the motherboard, the latest version of the BIOS was already installed on it.

Pentium 4 661

[DeathBringer]

Well. Your motherboard doesn't support FSB=1066 Mhz. So you need downclock speed Pentium XE 955 to boot with it. You should make BSEL mod 1066->800. If it boots normally then reflash latest BIOS AsrUBios.exe and overclock to normal state.
Or simply buy supported Pentium D 9x0 with FSB=800 Mhz. Pentium D 9x5 are not recommended - they don't support virtualization.
BTW: you need motherboard's PCB version R1.04 to use dual-core CPU.

[shahbai]

How do I do this? ---> "You should make BSEL mod 1066->800"

[DeathBringer]

You need to connect pad BSEL1 to VCC (view from top of CPU):