3770k IHS Removals - CPU temp dropped from 79C to 71C

[cab]

Is that right? Draw a pic of the thing... Seems like if you remove some buffer material, the die is a fixed distance off the PCB and the inside of the IHS is also a fixed distance, so by removing the intel black sealant of height x we are effectively lowering the internal clearance between the die and the IHS by that same distance. Am I thinking about this right?

Link to full size:


EDIT: http://forums.anandtech.com/showpost...1&postcount=31

Thank you, that's an excellent photo. It doesn't look like regular runny TIM, it seems more like hard, crumbled ceramic.

[graysky]

Is that right? Draw a pic of the thing... Seems like if you remove some buffer material, the die is a fixed distance off the PCB and the inside of the IHS is also a fixed distance, so by removing the intel black sealant of height x we are effectively lowering the internal clearance between the die and the IHS by that same distance. Am I thinking about this right?

Ha! Here is a crude drawing of what I typed:


My hypothesis is that when the caulk is removed (black dots) the headroom above the die (red arrows) decreases by that same distance. So if you lap the bottom of the IHS, you will decrease further the internal headroom perhaps to the point of crushing the die when locked in place. Just my thought. Others?

[dr_dx]

Is that right? Draw a pic of the thing... Seems like if you remove some buffer material, the die is a fixed distance off the PCB and the inside of the IHS is also a fixed distance, so by removing the intel black sealant of height x we are effectively lowering the internal clearance between the die and the IHS by that same distance. Am I thinking about this right?

Link to full size:


EDIT: http://forums.anandtech.com/showpost...1&postcount=31

You are absolutely correct. The IHS will be lower once the black stuff is removed and it may not need to be lapped at all. A quick check will verify. I need to edit my comment to reflect that.

[OldChap]

Ha! Here is a crude drawing of what I typed:


My hypothesis is that when the caulk is removed (black dots) the headroom above the die (red arrows) decreases by that same distance. So if you lap the bottom of the IHS, you will decrease further the internal headroom perhaps to the point of crushing the die when locked in place. Just my thought. Others?

Precisely the point I was trying to make in post 181. If you can measure the gap with a feeler gauge once the black glue is cleaned off then one must expect that the IHS and the die are in good contact. If however the gap is so small or non existent then there may be some advantage to "lapping" the edges of the IHS (nearest the circuit board) to ensure the good contact.

[WhiteFireDragon]

What's the best method to apply the TIM between the IHS and the die? I'm assuming 2 drops (since the die is rectangular) of TIM on the bare die, and let it auto-spread when the IHS is clamped back on?

[graysky]

What's the best method to apply the TIM between the IHS and the die? I'm assuming 2 drops (since the die is rectangular) of TIM on the bare die, and let it auto-spread when the IHS is clamped back on?

I used the line method described in the AS5 instructions.

[ZoLKoRn]

More update with change to new TIM by Coolab Liquid Ultra



before i used GC-Extreme from Gelid an image show for how the contact it look good(after testing)


result from GC-Extreme


Change to Liquid Ultra


result from Liquid Ultra


Graph results


Conclusion

So it can more less temperature around 9-10C from GC-Extreme and for total from stock intel TIM to now seem
i can less temperature around 20C after change to Liquid Ultra that cool ! and now my chip can benching at 5GHz
before this chip never can benching at 5GHz

[ChaosAD]

Some great info here Zolkorn. Really appreciate your effort

[Riska]

Just a heads up Zolkorn do not put that cpu under cold with that liqued ultra it will die i did that and hwen it gets very cold the liqued ultra contracts and there is no contact on the IHS no more and the cpu wil burn..

[ZoLKoRn]

Thansk ChaosAD and big thanks Riska for your sharing about details it helpful to me

btw. i think if i will playing with sub zero i will install by without IHS maybe it will better

[cab]

Why not use vapor chamber type cooling, borrow one from a GPU...




http://www.hardwarezone.com.sg/tech-...uper-overclock

[WhiteFireDragon]

Thanks for the results ZoLKoRn. 10C difference between "normal" TIM and Liquid Ultra is actually pretty significant, considering the difference between the best air cooler and a mediocre air cooler only gives like 5C difference. It's amazing only TIM can have such a difference.

Would also be nice if you had Liquid Ultra compared to Liquid Pro.

[WhiteFireDragon]

Just did mine, 40°C lower on one of the cores . If I average temps from all cores before and after the mod, then it's 79.25°C before IHS removal, and 59°C after IHS removal. That's still 20°C difference, which is quite amazing. I just got a really bad chip out of the box. It couldn't even run stock voltages because one of the cores hits over 100°C. After undervolting to 1.07v @ 4ghz OC, one of the cores still hit 98°C, so this mod was pretty much required for me to get good temps.

[Zeus]

Eh, 79-59=? 40? Still very much worth it imho. I have already ordered Liquid Ultra. Having done a few AMD cpu's in the past it shouldn't be too hard. With AMD cpu's one has to be very carfull not bend the pins, something you don't have to worry about with these cpu's.

Hoping to get 5GHz fully stable, now it's only 32M stable.

[WhiteFireDragon]

Eh, 79-59=? 40?

haha I think you read it too fast. One core was at 98°C before mod, now it's at 58°C, that's 40°C difference. But the average of all cores before and after mod was a 20°C lower.

[Zeus]

My bad, sorry. I haven't had enough coffee. I can't believe you're still seeing 98ºC on one of the cores, that's rediculous!. I haven't watched your video, what tim did you use?

edit: Just watched your video, nice to see.

[zalbard]

Just did mine, 40°C lower on one of the cores . If I average temps from all cores before and after the mod, then it's 79.25°C before IHS removal, and 59°C after IHS removal. That's still 20°C difference, which is quite amazing. I just got a really bad chip out of the box. It couldn't even run stock voltages because one of the cores hits over 100°C. After undervolting to 1.07v @ 4ghz OC, one of the cores still hit 98°C, so this mod was pretty much required for me to get good temps.

Nice video, thanks! I kinda lol'd when I saw your thermal paste 'arsenal'.

[mastabog]

One more happy (and lucky) person to join the IHS-successful-removal gang. 3770K in my case. My max load temps (prime95 with in-place FFTs) decreased by 12C from 75C to 63C.

My cooler is the first version of the Thermalright VenomousX (about 2 years old I think). With a better cooler the temps should be even lower. I'll get a new one soon as I want to OC this beast to the max on air.

[OldChap]

If any of you fine folk who have de-lidded already have the capability, could you please measure the thickness of the metal that is the IHS.

I want to do some testing/calculations before I take down mine and do this.

[Leeghoofd]

Thansk ChaosAD and big thanks Riska for your sharing about details it helpful to me

btw. i think if i will playing with sub zero i will install by without IHS maybe it will better

Didn't Shamino already try that mate ? thought he experienced alot of cold issues then... ( but my old brain could let me down ofc )

[ZoLKoRn]

Hmm... very interesting Leeghoofd ! but what you mean for Shamino try ? already try for without IHS right and result not different ?

Well i have some discussion with my team mate today, he told me maybe intel stock TIM under IHS problem with sub zero or maybe
bad contact because his check temperature under LN2 benching about 5.xGHz and LN2 full pot that mean -185C+ right ! but he
looking to Realtemp and it show big jump of temperature after cpu has load to 80-90C !!! that wrong because Realtemp shouldn't
big jump of temp like that

So i thought maybe all our problem with Ivy Bridge can't go high clock under LN2 because two issues, bad TIM or bad contact
between die and IHS

btw. Thanks for you info Leeghoofd

[MaxT]

Just went through this as well on my I7-3770k.
Dropped the highest core from 92c to 69c with the same ambient temps. The rest of the cores droped between 18-20 degrees as well.
This was running at 4.4GHz originally and now quickly testing 4.5.

Intel absolutely blew it with the TIM on the K versions. So much better with CL Liquid Ultra.
By the way, CLLU is veeeery easy to apply, you just "airbursh" the liquid metal around.

Do NOT use a regular double sided razor blade. It is too thin and too flexible. It will bend on you and it will cut the PCB!! Use the thicker blade WhiteDragon used in his video.

[dr_dx]

5Ghz @ 1.296v stock TIM/GC Extreme




5Ghz @1.296v identical except Liquid Pro/Liquid Pro RESULT = -27C,-28C,-26C, and -23C = -26C avg difference




5Ghz @ 1.288v




IMHO, Liquid Pro is definitely the way to go; used on all 4 surfaces (all surfaces need to be "wetted"). Use a very small drop on die and underside of IHS - a little goes a long ways. BTW, I didn't have to lap the IHS, after cleanup, it was resting on the die. Highly recommend using a single sided safety razor. Very thin blade, will cause the least amount of PCB distortion. Just rock it back and forth and you can be done in less than 5 minutes.

[Sniper]

Unbelivable temps and cpu

Time to push it further.

[zalbard]

5Ghz @1.296v identical except Ultra Pro/Ultra Pro RESULT = -27C,-28C,-26C, and -23C = -26C avg difference

Ultra Pro?
Do you mean Coollaboratory Liquid Ultra? Coollaboratory Liquid Pro? Something else?