Hi all,
last week I updated my daily driver iMac's CPU and GPU (got i3-540 and ATI Radeon HD 4670 replaced with i5-680 and Nvidia Quadro K1100M). It wasn't working bad, but I use it a lot and found the parts for a good price, so I thought it was worth upgrading.
Now I'm quite happy with the performances but I think I have a temperature issue.
A little breaf:
The upgrade went well; I've only had a couple of minor problems:
1) when I accidentaly removed the CPU socket screw with the lever fastened, the whole socket was hit by its force but not apparently damaged and
2) when I removed the GPU I accidentally wiped the thermal pads with the old thermal paste, but I was (supposedly) able to put them back in place and give them their shape and thickness again.
I didn't take a picture of the thermal paste quantity and pattern I put but I don't remember putting too little. The paste tube I used was about 5 years old but I have another machine assembled with it with no thermal issues at all.
When I restarted the machine the RAM was failing, and I got it working by changing a few times the position the non-original couple (an update I made years ago) and resetting NVRAM.
Then the software part was a bit of a pain, but, after flashing the new vBIOS on Linux, with the help of a gentle user of here I was able to do a clean install of High Sierra and boot it via OpenCore with full functionalities.
Before I was running Sierra, and unfortunately I haven't recorded its temperatures before the upgrade, but now I can notice that my new CPU is running around 10 °C warmer than before on average: it has never been a "cool" machine, but I remember that on idle it stayed in the high 40s and now it's in the high 50s, and its very maximum was around 80° while now its 90°.
In the last two days I stressed my CPU quite a bit and there wasn't any throttled recorded, but I don't like that, with all my effort, after a prolonged use the CPU fan starts spinning quite fast (as it never did before); and I don't want the machine to be damaged by heat.
Here you find an assay of the temperatures in different conditions: First of all: do you think there is actually a problem? If yes, what do you suggest me to do to solve it or understanding the cause?
Thank you very much for your help!
last week I updated my daily driver iMac's CPU and GPU (got i3-540 and ATI Radeon HD 4670 replaced with i5-680 and Nvidia Quadro K1100M). It wasn't working bad, but I use it a lot and found the parts for a good price, so I thought it was worth upgrading.
Now I'm quite happy with the performances but I think I have a temperature issue.
A little breaf:
The upgrade went well; I've only had a couple of minor problems:
1) when I accidentaly removed the CPU socket screw with the lever fastened, the whole socket was hit by its force but not apparently damaged and
2) when I removed the GPU I accidentally wiped the thermal pads with the old thermal paste, but I was (supposedly) able to put them back in place and give them their shape and thickness again.
I didn't take a picture of the thermal paste quantity and pattern I put but I don't remember putting too little. The paste tube I used was about 5 years old but I have another machine assembled with it with no thermal issues at all.
When I restarted the machine the RAM was failing, and I got it working by changing a few times the position the non-original couple (an update I made years ago) and resetting NVRAM.
Then the software part was a bit of a pain, but, after flashing the new vBIOS on Linux, with the help of a gentle user of here I was able to do a clean install of High Sierra and boot it via OpenCore with full functionalities.
Before I was running Sierra, and unfortunately I haven't recorded its temperatures before the upgrade, but now I can notice that my new CPU is running around 10 °C warmer than before on average: it has never been a "cool" machine, but I remember that on idle it stayed in the high 40s and now it's in the high 50s, and its very maximum was around 80° while now its 90°.
In the last two days I stressed my CPU quite a bit and there wasn't any throttled recorded, but I don't like that, with all my effort, after a prolonged use the CPU fan starts spinning quite fast (as it never did before); and I don't want the machine to be damaged by heat.
Here you find an assay of the temperatures in different conditions: First of all: do you think there is actually a problem? If yes, what do you suggest me to do to solve it or understanding the cause?
Thank you very much for your help!
