i7 7700K + BeQuiet Shadow Rock 2 = Bending issue?

Belinir

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Jan 5, 2017
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A good day to you, fellow hardware inclined people.

I just finished upgrading my build to an i7 7700K on an Asus Strix ROG Z270F. On top of that, I installed my Shadow Rock 2, which is a pretty heavy fan that takes a lot of space on the Mainboard.

On my old mainboard with an older socket, the little black plastic clips that hold the screws of the backplate in place made it impossible to put the cooler on too tight. On the new one, the socket seems to sit a bit higher so I had to improvise and tightened the screws one by one until the cooler sat in place firmly.

So, for now, it seems to work. I didn't remove the cooler and the cpu to check if there is any bending on the pins yet. Since I have no clue what bending will actually do to my performance / if my PC should even work once bending has occurred, I'll list some stats I am aware of.

Currently, the CPU is sitting at around 40°C idle. Not sure how much would be normal, my oversized heatsinks on the motherboard also didn't allow me to change the position of the clipped on CPU fan to any other than facing my GPU (There's like a 1cm gap at max). For the people that are not familiar with the Shadow Rock 2 cooler, it simply is a gigantic heatsink in form of a cube with a detachable fan on one of its sides, you can clip it to any side that has enough space to fit it. So, maybe the temperature could be increased due to that.

With 150 processes running, it is currently at a speed of 4,5GHz, which should be it max speed while boosted. This is still idle so I am not sure if it should run on boosted instead of its max speed of 4,2GHz.

I also noticed that my PC feels a little sluggish since the update. For instance opening a new tab in the browser or even highlighting text has a bit of a delay which wasn't the case before the installation of the new parts. (The sluggishness was mostly in Chrome, could reduce it by simply closing down some unneeded tabs, wow, that was easy.)

However, any information about bending with the LGA 1151 processors, especially Kabylake is appreciated.
 

Belinir

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Jan 5, 2017
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Here's an update: Will it bend? The answer is, YES! It bent my pins and those gigantic heatsinks made it hard to fit my GPU in as well (It's an Asus Z270F). So, a word of advice, even if a company claims your cooler is LGA 1151 ready, it probably just means it's ready to bend your pins. I'll find a different cooling solution for this build.
 
This doesn't make much sense. The pins on intel lga (land grid array) sockets are in the motherboard socket. The cpu only has the flat contact pads or 'lands'. When the cpu is locked down into the socket the pins are designed to bend, they're already leaning. As in they will flex under the pressure of the cpu to ensure contact to the lands.

An air cooler with a backplate is only liable to bend the cpu if it's mounted too tight, too much mounting pressure. The only support of the socket is around the edge of the cpu, in the center where the pins are there's nothing supportive there. Crank a cooler down too tight (can happen with aio water blocks also) and it will press on the center of the cpu into the open socket area below causing the edges of the pcb substrate to bow a bit at the corners. It's nothing to do with the weight of the cooler.

In order for the cooler's weight to cause damage it would have to damage the motherboard as well. The large backplate is made of metal and would take unnatural abuse to bend it. With the pressure spread over such a large area of the board with such a rigid backplate, the motherboard would break before it flexed enough to cause damage to the cpu from the weight of the cooler hanging off it.

It's a larger air cooler but it's not the largest nor the heaviest. The nh-d14, nh-d15, dark rock pro 3 etc are all larger and heavier. People have used those successfully with skylake cpu's and unless they changed something for kaby lake it's no more fragile than skylake was. The bending issues came from people tightening the cooler down too hard.

If you did something and bent the pins on the motherboard it's not due to the hardware. It would be a matter of user error or improper installation. Normal mounting of the cpu in the socket and locking it down won't damage the pins, either they were damaged to begin with or got damaged from carelessness.
 

Belinir

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Jan 5, 2017
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I assume it is mounting it too tight in this case. On the Z87K the cooler was easy to install and I wouldn't have been able to mount it too tight. With the Z270F I could only tighten the screws around half way and had to adjust every single one (I assume the socket sticks out higher from the motherboard or something).

Also talked to my store and explained the situation so they will probably take it back. I definitely won't deny that I could have made any mistakes but it seemed obvious that the cooler wasn't built for the socket. It may even be, that I miss judged some pins that are supposed to be that way with bent ones and the problem was something else entirely, but it didn't look like a pattern that is supposed to be that way - I noticed before that they already lean, some faced different directions though. Maybe only 5, or 6 that were in really odd angles. Kinda doesn't make sense if something flat presses on it, but fact is that this motherboard stopped working for a reason.