Bad lag when gaming

BA Velox

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Mar 30, 2014
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Hi,

Having an issue and wondered if anyone has any ideas. Trying to do the odd bit of gaming on my work laptop. It's not amazing but plays older games fine (or did anyway). The problem is after about 5 mins in any game, the machine starts to lag really badly and becomes totally unplayable. I've been trying to work out the cause for ages and its only tonight I've managed to take it a bit further.

I've been checking procmon & procexp and didn't really spot anything until tonight when I noticed that when the issue occurs, the GPU hits around 100%. When I tab back to desktop, the GPU will stay at 100% for anything up to about 5 mins then will drop off to a 'normal' level. At this point the machine acts as normal and if I tab back to game, everything will be ok for another couple of mins until it does it again. At the point when its fine, the GPU would be running at around 30 - 60% I guess and even right up to about 90% GPU its fine. It only seems to be when it maxes out at 100% that the machine starts to chug.

According to Open Hardware Monitor, the GPU is up at around the 90c mark and CPU is around 90 - 95c. I dont think its heat as when I tab out and it starts running normally, the GPU can still show at over 90%. I could be wrong though! I don't see any clock speeds dropping off when it faults so I dont think its due to any kind of thermal cut-out but thats more of a guess than anything.

I haven't tried a rebuild yet as this machine has tons of work stuff on it that I can't really be assed to load back on so trying to see if there is any other fixes I can try.

It's scanned regularly using malwarebytes and has a paid for AV product loaded. Video drivers were updated tonight. It's usually patched up with Windows patches.

Laptop is an i5, W7 X64, 4GB + 128GB SSD. Video is an Nvidia gt330m.

My gut feeling is that this is hardware and not fixable but open to suggestions! Guessing this is the correct forum for this but apologies if not.

Thanks

Velox
 
Your cpu/gpu are throttling from the high temerature.
Make sure that your processor cooling is set to active in power options.
I suggest opening it up and cleaning the heatsinks if you can.
If you can't open it up, just get a dust blower spray and use it in the air intake.(when the laptop is off)
Another thing you could do is get a laptop cooling pad.
 

BA Velox

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Mar 30, 2014
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Thanks for the response Sunder25. Yes you may have a point. I didnt look at the values too closely but from the screenshots I took last night, I just spotted that when the fault occurs, core 1 of the CPU drops to about 1.1 Ghz instead of the standard 2.5 Ghz it usually runs at. I was looking solely at the GPU but actually that might be a an effect rather than a cause. Does this sound like a possibility?: The CPU throttles down to 1.2G so everything tries to shift onto the GPU & that shoots it up to 100%?

I'll run some more tests tonight to see if I can see a direct link between temp and this drop in CPU I see in my screenshot then i'll take it from there. Will try and update later.

Thanks!
 
It's not quite so simple, but the general idea is that if the cpu throttles you're not ok.
Also, the gpu can also throttle, depending on its own temp.
And since you said it was measured to 90degrees, throttling is a good bet.
The point is, you need to improve your cooling as soon as possible.
 

BA Velox

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Mar 30, 2014
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I just tested again and there doesn't seem to be any link between the actual values and when it happens (that drop in CPU didn't occur again) but saying that I do still agree that it could well be temp related. I had the temps up to 100c on both cores and 98c on the GPU just from running minecraft in a window so it does seem just a tad high ;). I'm going to try and strip it down later to clean heat sinks and possibly redo the thermal past if thats possible (never tried it on a laptop!)

Will update later

Thanks again!
 


Any time!
Just keep in mind that a 100c temp is not safe for a chip by a long shot.
If you don't do something about it, you are sure to end up with a burned out proc sooner or later, wether it be the cpu or the gpu.