Dell Optiplex 760: Quad core CPU support

[crisman]

crisman
Please show Service Tag (located on the back of the computer case, but can also be located on the top or side of the system) and screenshots of CPU-Z with all tabs.
Dell OptiPlex 760 series use common BIOS. It's a hadware limitation, not BIOS's probllem. Read this & that.

The Dell OptiPlex 760SFF also uses two types of motherboards depending upon the processor one is for quad core and other Non-Quad core CPU motherboard.

T674K motherboard does not support Core 2 Quad CPUs, only Core 2 Duo CPUs.
U562N motherboards support both Core 2 Quad and Core 2 Duo CPUs.

It is not the chipset, it is the number of voltage regulator IC's the motherboard has. The T674K is the cheap motherboard version and has less voltage regulator IC's.

Ok, Thanks for the reply!
I will check later night the board type then will post here.

[BokorGabor]

Hey fellas!

Can someone please make a modified bios for dell Optiplex 760 to support Intel Core2Quad 9550S? After changing to Q9550S the machine posts but gives invalid cpu error message.

Any help is greatly appreciated!

[DeathBringer]

Show a screenshot of third (Mainboard) tab of CPU-Z.
And post a photo of the screen with "invalid cpu error message".

[BokorGabor]

Here You go Sir!

Mainboard tab:
https://imgur.com/a/AwIkHn9

Error message:
https://imgur.com/a/9ooxE2X

Thanks!

[DeathBringer]

Try to flash my mod by Dell Client Configuration Utility.

[BokorGabor]

No luck, fw image failed one or more consistency checks

https://imgur.com/a/1gF7pYT

[DeathBringer]

Try to flash by this method - https://www.bios-mods.com/forum/Thread-O...#pid156753

[BokorGabor]

Tried linux method, after sending image and restarting still the same error

https://imgur.com/a/nKYQKc5

[DeathBringer]

Can you downgrade BIOS version?
Try to flash my mod after downgrading.

[BokorGabor]

Can you downgrade BIOS version?
Try to flash my mod after downgrading.

Downgraded to A15 then flashed mod, still same consistency error. Now trying linux method again without -reboot option