Hi Guys. I was just wondering if anyone is running stupidly hot 2008 Macbooks at the moment. Ever since I upgraded my late 2008 2.53ghz macbook Pro to Lion I'm running an oven on my lap. Just checked istat pro and my laptop is running the cpu at 180 deg F, gpu at 140 deg F. I assume other 2008 users are not seeing this.
It's so bad that if I start the laptop from scratch/cold, the fans will be spinning within 3 minutes...
- Launch Activity Monitor
- Change "My Processes" at the top to "All Processes"
- Click on the CPU column heading once or twice, so the arrow points downward (highest values on top).
- Click on the System Memory tab at the bottom.
- Take a screen shot of the whole Activity Monitor window, then scroll down to see the rest of the list, take another screen shot
- Post your screenshots.
The Intel processors used in Macs are designed to automatically shut down to prevent damage if they truly overheat. CPU Tjmax = 105C (221F), GPU Tjmax = 100C (212F) on i3, i5, i7 processors. (Source:
Intel) If you're not already using it,
iStat Pro will give you accurate readings of your temps and fan speeds, among other things.
Unless there is a rare defect in a Mac, most temps are well within the normal operating range, considering the workload being put on it. Websites with Flash content, games and other multimedia apps will put higher demand on the CPU/GPU, generating more heat. This is normal. If you're constantly putting high demands on your system, such as gaming or other multimedia tasks, expect temps to rise and fans to spin up accordingly. It's just your Mac doing its job to maintain temps within the normal range.
It is also quite normal for your Mac to become extremely hot to the touch during intensive operations. The aluminum body transfers heat more effectively than other materials used in computer casings, so you will feel the heat more. This doesn't indicate that it's overheating and will not harm the computer to be hot to the touch.
Your fans are always on when your Mac is on, spinning at a minimum of 2000 rpm (for MBPs) or 1800 rpm (for MBAs, MBs and minis). iMacs have 3 fans with minimum speeds in the 800-1200 range. They will spin faster as needed to keep temps at a safe level. If they're spinning up without increased heat, try
resetting the SMC. (PRAM/NVRAM has nothing to do with these issues, so resetting it will not help.)
The intake and exhaust vents are in the back of the computer near the hinge on all Mac notebooks (except the new MBP with retina display, which has intake vents along the sides at the bottom). The iMac vent is a slot on the back near the top of the computer. Make sure the vents remain unblocked to allow your computer to perform at its best.
Learn about the fans in your Mac
Apple Portables: Operating temperature
For Flash-related issues:
