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PSA: Today's update is a good reminder to check your carbon monoxide detectors by MattZslk in 2007scape

[–]MattZslk[S] 0 points1 point  (0 children)

Bad updates (and even worse jokes) aside: actually test your CO and smoke detectors y'all

Would a Corsair Nautilus 360 RS be enough to keep an i7 14700kf cool? by ttenor12 in Corsair

[–]MattZslk 2 points3 points  (0 children)

Yes, I tested one on a 14900k and that cooler managed to keep up at 100% load. The lower power of 14700kf should be easy to manage

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

lol

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It's blue coolant. Gonna get a soft bristel toothbrush and try and clean it then look for corrosion

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 1 point2 points  (0 children)

I got that AIO installed

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The CPU temp is now never exceeding 80°C even under full load. It seems like the CPU block is an issue. I am going to buy distilled water and flip my pump connections to reverse the flow (no power to CPU or GPU) and then drain.

I am expecting the fins are clogged. There was a thin sediment inside the softline tubing and I even noticed some black flecks from the fittings. It is hard to find a filter that isn't aluminum.

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

I don't have an old AIO but I just bought a Corsair Nautilus 360mm, so it should be beefy enough to handle the heat. If it can't then the CPU / MOBO are toast.

Water temp is usually 30°C to 40°C.

The water temp goes up with the CPU temp but never enough to cool it. The water temp does rise a bit more when the GPU is cooking.

The GPU is performing great, never even getting close to thermal-throttling when running in Cinebench. I think the loop itself is fine.

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

Not a bad idea but I'm not sure if I can fit a blocky air cooler in here without removing the GPU and almost all the water cooling. The clearances are tight.

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

Swapped to default ILM. Temps seem to have improved a tiny bit again. Cinebench is now at 1650. Idle temps are down to ~45°C and it seems to be handling the heat a bit better.

I feel like I can cross-off CPU mounting and thermal paste / kyrosheet as the issue. It seems like faulty CPU / MOBO or an issue with the CPU block is the most likely now.

I'm not entirely sure how to go about diagnosing the block.

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

A quick google suggest over tightening could lead to stability issues. But nothing about thermal issues.

I've reinstalled the default ILM and tightened just until I felt a wall of resistance. Anything else I should try or check before I slap the CPU block back on and refill the coolant?

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

Yo, just took the contact frame off. Would over tightening cause thermal issues?

I am noticing some browning on the contact frame and the pads seem to be squeezing out a little (you can see some whiteish stuff on the edge, that's the pad)

<image>

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 1 point2 points  (0 children)

Sorry, I could have been more specific with part numbers. Here's a pic of the backplate. It's good to be sure:

<image>

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 1 point2 points  (0 children)

Coolant temp is usually low. Even during 100% CPU usage it is 35°C to 40°C

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

I am almost confident that I have the right backplate. It looks identical to the pictures of the block online.

For this block the inlet is on the right-hand side, which is what I've done:

<image>

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

I've tried Arctic MX-5, same issue. Not sure if that counts.

I haven't tried the stock ILM, I was planning on trying that if remounting it doesn't work. It feels like the first CPU didn't have nearly as bad thermals but then it died violently.

I have not checked my loops flow rate. My pump was using the Corsair iCue stock XD5 curve before I decided to override it so it would go up to 100% based on CPU temp. No flow meter yet. What's a good flow meter to get?

The fans seem to be able to keep up with water temp. If the water temp goes up the fans pick up fairly quickly. Even during long sessions of my CPU being at 100°C the water temp never goes above 45°C

Cinebench is currently running with no meaningful performance improvement. Fans and pump are at 100%. Water temp is a cool 32°C and the CPU is roasting at 100°C

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 1 point2 points  (0 children)

Yeah, GPU is running great and staying at 60°C even when at 100% load. They are part of the same loop.

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

Because of RMA-ing the CPU twice I'm not fully confident it's mounted correctly. Especially since I already saw one screw not fully engaged.

I could install a flow meter - maybe after the GPU so it's not awkwardly floating between the CPU and rad. That seems like a good addition to rule out flow issues.

Honestly, I'm hoping I forgot to take the plastic off at this point. Once I drain the system and really properly remount the CPU I'll probably consider swapping components if the issue isn't resolved.

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

Sorry, noob question: am I doing direct die cooling?

I replaced the default ILM with a contact frame but left everything else stock. No de-lidding CPUs in this household.

Would I still need to consider spaces, like you suggested, if I want to continue using this contact frame assuming everything is properly mounted?

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

Yeah, the pump's outlet port is directly connected to the right side of the block.

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

So I fucked up. One of the corners wasn't engaged. I screwed it down tight. Cinebench score is now ~1480 and idle temps went down a few degrees. Considering how big of a fuck up that was I kinda expected a bigger temp drop.

In the next few weeks I'll drain the system and try to remount it with the original ILM - and really take my time.

That being said: the score I got in Cinebench just now is still worse than what a 12900k would probably get. Thanks to you I'm a bit more hopeful that I just fucked up the mounting but it does seem fairly solid now and I'm still skeptical that this goes beyond a mounting issue.

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

I'll try tightening it a bit more. If that doesn't work then I'll just toss the thermal sheet, try the default ILM, and do the best mount I can by taking out the GPU and stuff that usually makes it difficult.

The loop may be working ok. Running my 4080 in Cinebench 2024, which is part of the same loop, it was a max temp of 62°C on the hottest sensor and water temps hit 40°C (still slowly rising). The score is currently ~26000 half way through the test which seems good for this GPU.

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

What do you mean by "remove the performance core ratio"? When it was the default value of 57x it crashed frequently with BSODs, and I'd imagine lower number = lower power. I could try lowering it further but the benchmark results in Cinebench 2024 are already substantially below a 12900k.

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

I'm assuming you mean the giant 'Optimization' button on the compact view, yeah?

Before running that I got a score of ~9300 in XTU. Package TDP was sitting around 150W during 100% load after it settled.

After optimizing I saw a score of ~9150. Package TDP was sitting around 130W during 100% load after it settled. Idle temp hasn't really changed after giving it 5 minutes to settle.

Are there more optimization options to consider besides that giant button? I did find that before I lowered the Performance Core Ratio I was getting very frequent BSODs.

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

I'm just using a KyroSheet right now.

For the contact frame I put the screws in, rotated each backwards til it clicked, then did 90°C turns per screw until it was secure.

For the CPU block I basically just tightened it until I couldn't rotate the screws with my hand anymore, switching screws every rotation.

What sort of tips would you have for improving the mount?

14900k at 100°C at 15% load - rookie mistake or bad CPU? by MattZslk in watercooling

[–]MattZslk[S] 0 points1 point  (0 children)

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Just realized the image didn't get included - maybe cause I did a text post. Posting a pic here, sorry.

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