P750DM-G Power Supply Issues or not? Please help

Hi all,

P750DM-G (2015)

• Skylake i5 6600K
• Nvidia 980M
• 8gb RAM
• 480GB Sandisk SSD

My P750DM-G has been working fantastically for four years until just recently. On any stressful gaming task, e.g. doing MMO raids or FPS , the laptop completely powers off. Sometimes it will immediately restart, sometimes it will remain off until i manually switch it back on. On other occasions, during similar stressful gaming tasks to the aforementioned, the power adaptor will power off and laptop will go into power saving mode but not switch off - as it would when the adaptor is not connected.

Running temps are maximum 60degrees celsius when the power switches off, however, i have manually adjusted the fans to max and, under the same gaming stress conditions, achieved a constant 46 /45 degrees celsius GPU and CPU respectively but yet the power offs still happen, which make me think it's not heat related.

Playing with the power adaptor not plugged in, everything works fine and as it should do, however, i'm not sure whether this is because the GPU draws less power.

At this point im not sure whether it is the PSU Adaptor or the GPU. Just wanted to check with you guys on here first to see what you think i should try ?

Personally i think it's the PSU adpator that's done, and i need a new one but am open to opinions.

 

My guess would be the PSU, I found it pretty common that they start failing after several years of use. Usually a failing GPU will give you other symptoms like display artefacts etc. Or it will just give up completely like my 980M did.

 

When the machine goes off does the LED on the PSU go out?

 

Yeah, so does the LED that tells you that the laptop is on charge.

Hi, thanks for taking the time to read my post. Much appreciated. Yeah, am familiar with GPUs dying in the past, and like you said and screen tearing are the first signs normally. With your input, I feel confident it is the PSU.

 

The brick is a suspect then, that or a vrm circuit on the gpu or CPU having an issue causing a short.

 

The PSUs don't fail often in our experience, but this sounds very much like a fault with the brick. If that's all it is, it would at least be an easy and relatively inexpensive fix.

 

With my TM1 and 230watt brick sometimes with stressfull tasks my brick would stop charging and Windows would go in PowerSave mode. With my 330watt brick this did not happen anymore. I am not completely sure this did the trick but it certainly looks so that way.

 

Two different classes of power consumption there though.

 

Right, and 230 watts should be enough juice for the OPs config.

Yep, the system defaults to battery/power saver if it attempts to pull more than the adapter can deliver. That 330w brick has got you covered, and then some.

 

With the 9900k I would say the 330w is a good idea too.

 

UPDATE:

Been playing the usual stressful gaming tasks the power cable unplugged and the power off still happened.

I've since run AIDA64 'stress test' with every box ticked for 15 minutes, and the power off is not happening. I've done this with power cable in and out - still runs fine for the entirety of the test.

This is really strange because the laptop powers off in WoW every time i go into a dungeon or raid almost without fail.

Any other suggestions?

 

Maybe you should try only tick the boxes Stress FPU and stress GPU in Aida64 stress test? This will force more load on Cpu. Aka push it harder. If so... Follow Cpu temps carefully.

 

Alright, i'll give it a go now.

 

See my last words in my post The one about temp.

You could also replace the Stress GPU test in Aida64 with Heaven benchmark test.

 

Switched the AIDA64 tick boxes around, no troubles there either CPU temps did rise to 73 Degrees Celsius which is quite hot, but the laptop didn't power off like it did when playing WoW. DL'ing heaven and will try that.

 

Just ran a full heaven benchmark test:
No power off at all. Max temp of GPU was 63degrees celsius.

score: 1386
Direct3D11
Mode: 1920x1080 4xAA fullscreen
Preset Custom
Quality High

 

You tested it simultaneously with Stress FPU checked in Aida64? Both tests run simultaneously.

 

Ran both simultaneously. Still no power off.
Score: 1436

 

Let's see, WOW is basically a CPU test it's not stressing the GPU at all. Does event viewer have any BSOD codes?

 

This is the event viewer when it happens, is this what you were referring to?




Really hope i can get to the bottom of this. My friend had a 1080 fail recently, said it was doing the exact same as this - just powering off the machine with no warning of component failure, not long after his 1080 actually caught fire .

 

Changed power to processor to 50% with adaptor plugged in, will see if the same problem occurs.

 

Unexpected power loss then. Usually something power related.

 

Hi All. Thanks for all your help on this.

Just a follow up:

It's now been several months and I haven't had a single power off or adaptor shut off. All I did was lower the graphics settings on all the games I play (Mainly WoW) .

Obviously I'd like to play on higher settings as I miss some of the effects on spells etc.

Do you guys think the graphics card is the likely culprit for the issue? Given lowering graphics settings has solved the problem.

Appreciate any response. There are a few good 980m's on eBay at the moment at a fair price and I don't intend of getting rid of this laptop since it does everything I need it to and likely will for many years. I do fancey upgrading parts / getting additional stuff for it tho, especially since black Friday/cyber Monday is coming up.

 

WoW is totally CPU bound usually anyway, you would need to look at the behaviour of the clocks and usage at each setting to see really what the difference is.

 

Aha, good point. I will check the CPU. It's a i5 6600K, any know issues for these failing due to being power hungry?

 

No, it's not a hog of a chip.