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El_Capitan

El_Capitan's i5-4670K Delidding and Lapping Comparisons Project (I

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This will be an ongoing project.

 

I just started diving into Haswell overclocking with the i5-4670K (and also Devil's Canyon i5-4690K), and I'm not liking it as much as Ivy Bridge's i5-3570K. Heat is a huge factor for holding back overclocking stability, and it seems that Intel isn't going to change back to soldering the IHS to the die anytime soon.

 

So, from delidding Ivy Bridge CPU's alone, heat isn't a limiting factor. You can see from my "This is why I like delidding Ivy Bridge CPU's" thread. Haswell and Devil's Canyon, on the other hand, get pretty hot. An overclock to 4.4GHz at 1.25V's is pretty much average, and you can expect temperatures over 90C during 100% CPU load stability tests with a good $70+ cooling solution (will edit after testing).

 

What happens if we delid it, and then also lap the CPU? How much of a difference will each of those modifications make?

 

Test Equipment and Setup:

i5-4670K with 4x4GB memory (more details later)

ASUS Z97m-Plus Motherboard (more details later)

Overclock to 4.4GHz at 1.25V's with 1:1 Cache ratio (more details later)

Hammer and vice method for delidding

Hand sanding from 400 grit to 2,500 grit for CPU lapping

Bosch ROS20VS (orbital sander) from 800 grit to 12,000 grit for CPU lapping

Hopkins 09515 Pocket Surface Level 

Corsair H80 in push/pull (fan details later)

Apogee HD CPU Waterblock and radiator in push/pull (radiator and fan details later)

Noctua NT-H1 for the die and IHS, and also for the CPU and CPU cooler (might change)

 

 

Testing Method:

2 hours of Prime95 Blend Tests (might change - I wouldn't want to burn out my CPU)

Real Temp 3.7 for temperature monitoring

 

Test 1:

Default i5-4670K CPU (not delidded or lapped) on Corsair H80

Default i5-4670K CPU (not delidded or lapped) on Custom Watercooling

 

Test 2:

Delidded i5-4670K on Corsair H80

Delidded i5-4670K on Custom Watercooling

 

Test 3:

Delidded and hand lapped to 2500 grit i5-4670K on Corsair H80

Delidded and hand lapped to 2500 grit i5-4670K on Custom Watercooling

 

Test 4:

Delidded and machine lapped to 12,000 grit i5-4670K on Corsair H80

Delidded and machine lapped to 12,000 grit i5-4670K on Custom Watercooling

 

Test 5:

Delidded and machine lapped to 12,000 grit i5-4670K on Corsair H80 with higher overclocking and voltages

Delidded and machine lapped to 12,000 grit i5-4670K on Custom Watercooling with higher overclocking and voltages

 

Conclusion and Results:

TBD

Edited by El_Capitan
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Cool, I'm looking forward to see :)

 

One question:

 

2 hours of Prime95 Blend Tests (might change - I wouldn't want to burn out my CPU)

Burn out your CPU?

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