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Laptop CPU heat pipe not working.

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Posted · Original PosterOP

Hi everyone!

I have a Toshiba Laptop C55-a model and I am having some serious thermal issues.

I just replaced my CPU thermal paste with some arctic silver 5 and I am still seeing massive thermal throttling.

I am running my laptop opened up and I realize that the part of the heat pipe that the CPU is below is very very hot but at about the end of the pipe where the fan and the heat sink is the copper pipe barely has any heat to it.

The air coming out of the laptop is basically cold.

Does that mean that the copper heat pipe is bad and I need to replace it?


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Is it all one piece between the hot and cold parts? I don't see how a heatpipe could just go bad... no matter how long it's been used.


I would assume you didn't put enough paste in or you put too much and didn't tighten the heatsink onto the CPU enough... Take it apart and do it again and see if that changed anything. I know it's a pain in the ass to do again, but so is replacing a burnt-out laptop. And make sure your fan is plugged back in and facing the right direction.

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Yes you have a bad heatpipe, but you can't replace the pipe itself. The entire heatsink assembly needs to go, which I think for something this old (from Intel Core 3rd gen era?) your only chance is ebay, either as a single part or an entire dead machine which you disassemble and take that part out. Like repairing a old car with parts from a junk yard basically.

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1


Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: 1TB HP EX920 PCIe x4 M.2 SSD + 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172), 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally Monitor: 1080p 126Hz IPS G-sync


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Posted · Original PosterOP

Thanks for the replies!

The CPU has no problem transferring the heat to the heat pipe.

Also it is one piece between the hot and cold parts.

There is the whole heat pipe system on Ebay for around 15 USD I can buy.

Here is a screenshot of the inside of the laptop I took from one of the disassembly videos.

laptop insides.PNG

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Posted · Original PosterOP

Quick update guys.

I just closed my laptop back plate and now I am getting no more than 63 Celsius running a stress test for 30 minutes.

I ave no idea why having the laptop internals exposed made the machine throttle 50%+

I am extremely confused and shocked but whatever floats your boat I guess...

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