Corsair A70 cooler heatpipe contact

[Sexual9900]

Hello.
I just bought an old . Corsair A70 cooler for $15. It works well but not good as my expectation.
I'm using Core i7 6700k and the room temp is 15*C.
- at stock clock the temp is up to 70*C while run Prime95 smallFFT.
- at 4.5GHz and 1.32V Vcore the temp is up to 85*C.
I don't think that is a good result for a cooler like the A70. The 65*C of temperature different at stock clock is not good at all.
I tried to reinstall the cooler and then I realized that 4 heatpipes didn't contact completely with the CPU because the heatpipes is too big. It has 4x8mm direct contact heatpipes.Only 2.5 of them are contact with the CPU. The others is out of the cpu heat spreader. I think that is the reason of bad cooling result.
So, are there any solution for that problem? Can I insert a copper plate on top of cpu to fit with the cooler or something like that?
Thank you very much.

 

[RememberThe5th]

Can you turn the cooler 90* and then screw it in place?(if the heatpipes interact with other things)

 

[Eximo]

Adding a shim won't do much since it would still be going through the heat spreader's contact area.

Your temperatures seem pretty normal for a cooler that size at those voltages under a stress test.

You did not hit thermal junction max on any of your tests, I would call that good enough for daily use which will be no where near as demanding.

If you want to keep it under 70C overclocked, you are going to have to invest in a serious cooler, de-lid, etc.

 

[Sexual9900]

@Robert: change the orientation didn't help bro 🙁
@Eximo: yeah I know. I mean, the copper plate is sized the same as the heatsink base...
The current temperature didn't hit the roof because it is cold winter here. But when summer comes the ambient temperature can reach above 40*C, and I believe the temp will be high AF 🙁