Hi,
I just tried few days ago IC Diamond 24 on old PC (i7-860 @3.7GHz) and CM Hyper TX3 the degrees were ~45 c Idle and ~ 66 C gaming.
Now:

The TX3 cooler was hard to install so I had to pull it off and install many times so regardless of that the thermal compound perform very well
Totally recommend.
I just tried few days ago IC Diamond 24 on old PC (i7-860 @3.7GHz) and CM Hyper TX3 the degrees were ~45 c Idle and ~ 66 C gaming.
Now:
The TX3 cooler was hard to install so I had to pull it off and install many times so regardless of that the thermal compound perform very well
Totally recommend.
