CPU fan screws too small

[Hocknose]

ok so I decided to buy a new PC case and motherboard.

I start transferring all the components from my old PC to the new one and leave the CPU until last. CPU slotted in perfect then I go to put the fan on and start screwing it in to the motherbaord and the screws aren't biting. I have a closer look and the holes on the motherbaord are way too big for the screws of the fan. I'm stumped!!!

I work in IT support so I have quite an advance level of hardware knowledge and I've not come across this before...any ideas?

Motherboard model: Gigabyte GA-P41-ES3G Socket 775
CPU: Core 2 Quad

 

[JMMD]

Which heatsink are you using? Was there's a retention mechanism/backplate on the other motherboard?

 

[Tmagic650]

You will need a new CPU fan/heat sink for the new motherboard. For the Intel 775, there are basically 2 types of CPU heat sinks. Plastic push pins and the metal back plate metal screw type. Are you sure you didn't leave the old Intel metal back plate on the old motherboard?

 

[Hocknose]

I've just had a look and I did leave the backplate on the old motherboard...

Cheers for your help guys!!!

 

[Tmagic650]

Thanks for the update Hocknose... good work!