M1330 CPU temp

Hi all

Been reading these forums for awhile. I purchased an M1330 (with Nvidia 8400) and I performed the copper mod, which brought my GPU temps down (between 43 celcius and 68 celcius) - however what I'm most concerned about is the CPU temp. When watching videos (HD) on sites like revision3.com, the CPU runs at a max of almost 100 celsius at peak (measured using HWmonitor), max of 99 celsius). Right now it's idling at 45 ish celsius. Basically when I start a video, I steadily see the CPU cores start to increase and the fan kicks in, then kicks in harder at about 85 to 90 celsius.

Is this normal? Running A15 and the CPU is a T8300 2.4ghz

Thanks

 

I've got the T7300 and 8400 with copper mod, and never see CPU temps higher than 75C even when watching HD. You might want to check that the thermal paste is ok on the CPU from when you took off the heat sink to do the copper mod.

 

Thanks, I am going to check it again, I did check that the screws holding the CPU and rest of the heatsink were nice and tight. How much thermal paste would you recommend for the CPU?

 

It's really not much, just enough to cover the CPU with about a millimeter thick coat. I put like a small pea size amount on the CPU, then spread it around with an old credit card, to get it all even.

 

Thanks I redid the mod, temperatures peak at around 70 celsius for the CPU and 68 celsius for the GPU - still not as low as what other people are getting it seems, but within the boudries...idle temps are now around 36 celsius for the CPU though

 

Was the CPU running that hot before your copper mod? I think it's possible that your copper shim might be a bit too thick, resulting in a "tilted" heatsink making poor contact with the CPU. The extra thermal paste might be bridging the gap now, but that's still sub-optimal.

 

Not sure, never tested it...I didn't use an additional copper shim on the CPU, only the GPU, is this incorrect?

 

This is indeed what you are supposed to do.

However, if the copper piece is too thin or too thick, it might cause the heatsink not to sit properly on the CPU... and thus those temps go crazy. This is partially why I think manufacturers use thermal pads in the first place.

 

I purchased a ready-made one from an eBay seller here in the UK who sold them specifically for this purpose, so I assumed this was OK. What are my options in terms of checking whether the CPU and heatsink are flush? I tightened the screws as hard as I thought was possible without applying too much force...

 

1) Clean the heatsink and CPU thoroughly.

2) Apply a super, super thin layer of thermal paste across the whole surface the CPU.

3) Screw on the heatsink tight.

4) Take off the heatsink and see if the entire imprint of the CPU die is on the heatsink.

If you've got an imprint of the entire die on the heatsink, it's probably level and your problem may lie elsewhere.

 

Great, going to try that, thanks very much for your assistance!

 

how hot is to hot for cpu? i noticed my temp increased too. but only about the same as the gpu

 

Depends on the CPU but for my T8300 I'd say above 75 celsius is too hot.