AIO Problem 14900K 420mm downsized to 280mm.
Posted by Chris00008@reddit | buildapc | View on Reddit | 13 comments
I built my computer into its old, smaller mid tower case. I bought a 280mm arctic LF3 AIO to replace the 420mm aio that is in the monster overclocking case I have.
I have been building for 30 years.
The computer idles around 30C which is good. However, when I run cinebench R23, it instantly shoots to 100C and throttles.
The old setup could easily run 253W all day around 70C and it never throttled.
This does not seem to be a lack of cooling because it shoots up so fast. The plastic was removed. The mouting is good. The pump rpm reports as credibly spinning. Could the flow in the radiator be blocked? I am absolutely 110% stumped.
Ponald-Dump@reddit
Something is wrong somewhere, I’ve been running a 280 on my 14900k since day one. Ive got mine undervolted and ac/dcll tuned, stays under 75* at 253w while scoring 38-39k in cinebench r23
Chris00008@reddit (OP)
I got it sorted and now its around 77C without being tuned.
Idk if anything has changed with the microcode, but when I originally tuned my 14900K, I undervolted and gave it a power budget of 260w (stock clocks) and it never throttled, got 41200 r23 consistently.
If you are getting 38-39K at 253w something with your tune might be iffy. That seems like it is throttling alot, it is down about 7%.
Ponald-Dump@reddit
No, nothing is throttling. I think my chip just isnt as well binned. 38-39k is pretty average for a 14900k, whereas 41.2k is pretty much top of the top
Chris00008@reddit (OP)
262w. Also fast ddr5.
Ponald-Dump@reddit
Yeah I’m also on DDR4, only throttling is powerlimit since I have it capped at 253.
Accomplished_Emu_658@reddit
Radiator blocked would not cause the shoot up. It is probably a contact issue. Are you using a contact frame? Remember 14th gen cpus like to bend.
Chris00008@reddit (OP)
arctic lf3 ships with proprietary contact frame. impossible to install without it.
aragorn18@reddit
While running a stress test, if you touch the pump do you feel vibrations? Is one of the tubes hot and the other cold?
Chris00008@reddit (OP)
I removed the pump and checked the mounting. The mounting seems lopsided with more paste on one side.
I've mounted maybe 20 AIOs in my time and never had this problem. There are only two mounting screws so I can only assume the plate is out of alignment. I will try to mount it again, but I suspect manufacturing defect.
aragorn18@reddit
That sucks, but at least you found what is almost certainly the issue.
Chris00008@reddit (OP)
It's all good now. I remounted and with stock 253w power limit, it is hanging out in the mid/high 70s in cinebench. Acceptable.
Thanks.
Chris00008@reddit (OP)
Its too late to debug this now. I will check tomorrow.
geemad7@reddit
How big is the cooler(copper part)? I think It is likely either a contact issue or to low of mass to sink heat.
I have a Alphacool Core on a 14900KS@320W. Even. that does not spike to 100 without waterflow, it wil get there ofcourse.
Whenever I had these problems it was almost always using wrong torque values on the waterblock mounting aka to tight. Or not enough.
On the other hand, if you AIO is defective, no fluid in it, bad rotor?
You could check the shake;)
Shake te radiator, to much sloshing then you have to much air in the loop, that can ruin your day and pump pretty fast.
Hope you figure it out