Laptop CPU upgrade issue

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porter55117

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I have an old laptop (NE56R) that I decided to upgrade the cpu from a b830 celeron to an i5-2540. It's the same socket, and compatible per manufacturer since they sell the same laptop with the i5 and same motherboard.

So tear down the laptop, swap out the cpu put it back together, and everything runs great except for one issue -- the laptop shuts down every time at exactly 29 minutes 55 seconds of uptime. It does this in windows, it does this in linux, it does this in just the bios screen, it'll even do it without a bootable drive. doesn't matter if idling for the time, or under a burn test. exactly 29 minutes and 55 seconds it shuts off each time.

It's not a heat issue, the new processor actually runs cooler. and the laptop doesn't nealy get as hot as with the celeron. it'll boot up right away after it shuts off - no errors at all.

bios and drivers are all up to date. clean install doesn't matter.

switching back to the celeron the system runs normally.

I'm guessing this means there's a hardware conflict or flaw, but it's just extremely peculair that it shuts off every 29 minutes and 55 seconds exactly. Any ideas?
 
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porter55117

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I used arctic silver with the plastic scraper and tried various amounts:
first just a tiny ammount that barely covered; shuts off at 29 minutes 55 seconds
second time fully cleaning it and added a bit more, still shuts off at 29 minutes 55 seconds
third time fully cleaning it and did the pea-sized ammount method, still shuts off at 29 minutes 55 seconds
last time i fully cleaned it, applied a thin strip down the middle, again still shuts off at 29 minutes 55 seconds

each time i monitor the temperature and it stays in the 40's for idling. it operates just fine for the duration and then just shuts off completely.

i'm not sure what's signifigant about 29 minutes and 55 seconds, but it's on the money for when it shuts off with the new processor. i put back in the celeron and it works just fine. the celeron runs about 10 degrees higher and is noticably warmer in operation.

i'm possibly thinking that Gateway used the celeron in the motherboards where the i5 couldn't work. wouldn't surprise me, kinda a standard practice.
 
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porter55117

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Yes, updated the bios before changing. However, the InsydeH20 bios is extremely limited on the laptop, so the most I could do was update to the current version. It detects the processor correctly.
 
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porter55117

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I did have a tube of Dynex thermal compound, and tried that one, spreading a small thin layer. Same issue, at 29 minutes 55 seconds it powers off.
 
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porter55117

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Is it possible that because it's a laptop, and the bios doesn't have any power or advanced menu to access, that it's likely a hidden bios setting that's triggering this? The laptop has InsydeH20 rev 3.5. The bios is very limited in what can be changed.
 
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JimF_35

JimF_35

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"each time i monitor the temperature and it stays in the 40's for idling. it operates just fine for the duration and then just shuts off completely."

Sorry I forgot to ask what exactly are your CPU core temps under 100% load? 40s are high for idle but that can be in large part due to your ambient temps. By the way what are your ambient temps?

Oh sorry one last thing, is your CPU fan making any kind of squeaking noise and sounds like it slows down just after a squeak?

Like this...

http://www.youtube.com/watch?v=ZQNeYB_ELJs

http://www.youtube.com/watch?v=QkCLubSukzI
 
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porter55117

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The fan operates normally. No noise, and it's clean.

The i5 idles around 38C-42C (1% use), and with typical heavy use it rises to 60C (though i can only use it for 30 minute intervals). The burn test had it rise to 88C for max load.
In comparison, the celeron idle around 48C(2-3% use) and tends to rise to 70C on heavy use. Didn't perform a burn test on the celeron. Room temp is 23C.
 
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JimF_35

JimF_35

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88C is kinda high. I still think that there is something going on with either your fan or your heatsink. For some reason it just is not doing its job for either of your CPUs.

Now for your Celeron. When under load what is it Core Voltage at? Where did you get his CPU was it used? It might be a degraded CPU.
 
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arrowrunner

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Mar 23, 2015
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Did you ever find a solution to this? I'm running into the exact same problem. It's as if there is a timer on the motherboard that shuts it off at 30 minutes if you're using an i5-2540.
 
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jsterrett

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Also have the same issue...

Took a ton of digging around on the internet, but it appears the CPU swap triggers Intel's Anti Theft Technology.... Here's a post from another forum explaining it a bit. https://www.bios-mods.com/forum/archive/index.php?threa...

I'm gonna look into reflashing the firmware, and will post back if it fixes the issue.
 
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LTran

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Porter55117,

I actually have the same issue a couple of weeks ago. My gateway is model NE56r11u withe a celeron B820. I updated the latest bios from gateway prior to installing a i7-3520 CPU. I also swapped a SSD, AC WiFi+BT card, new ram, clean install of 8.1. Same exact shutdown at 30min. I have a thread on bios-mods (https://www.bios-mods.com/forum/Thread-NE56R-Bios-Mod-Request?pid=89305#pid89305) and initially thought it was the intel anti-theft timer but confirmed that was disabled. Since then, I have returned the CPU and ram and back to the celeron B820 and 8gb. Luckily, I was able to return the CPU and ram.

The machine was super fast with the new hardware. It boots up and shuts down almost instantaneously (from the stock set up). I will be using the machine for some heavy processing this upcoming year so the 30min will only slow me down. I thought I would confirm that you are not the only one with this issue. I was thinking maybe trying an i3 or even a Pentium B960 since other NE56 models had that CPU. Any success on your end since March?

LTran
 
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chudmn

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Hardware conflict. The motherboard only supports Pentium and Celeron processors, the core processors are incompatible despite the socket. That laptop has a HM70 -- core i3's and i5's need a HM75 or HM77. HM70 is hardwired to shut down utilizing the anti-theft code in 30 minutes if the processor isn't a Pentium or Celeron.

So, the best you can do for your laptop is a B960. Otherwise you need to find a NE56r50u, which does have a HM77 southbridge.
 
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