Dell Optiplex 760 CPU upgrade

But i have read on other formums that you actualy can put C2Q in DT case, so my motherboard just isnt compatible?

Yes only some DT board supports c2q. No evidence that your board does.  No one has reported it.  

This is where i found that information https://www.dell.com/community/Optiplex-Desktops/Optiplex-760-DT-CPU-upgrade-fail/td-p/6032536 

if i need a coper heatsink for 95w cpu should 65w cpu do the trick?

I do not think so. 65W aluminum heatsink is not designed to handle 95W cpu. It will overheat. 

You can install but no promise motherboard will boot.  You would be the first user to report whether this motherboard model supports quad or not.

I currently have a 760 with 8GB Ram and a Core 2 Quad Q8400 Working perfectly, now I want to test a Core 2 Quad Q9650...

Hi @MalCriaO,

What size/form factor is your 760?

Optiplex 760 DT

Intel Core 2 Quad Q8400

*Previous processor* Intel Core 2 Duo E7400

8GB Ram PC2-6400

Motheboard 0R230R

Chipset Q43/ Q45

Also try a Xeon X5460 with MOD to LGA771 to LGA775, but it is not compatible with the chipset.

**Error** 2-3-4 Amber Light...