Izwerg Posted June 27, 2009 Share Posted June 27, 2009 I have 10.5.6 iDeneb 1.4 upgraded to 10.5.7 by iDeneb update on Samsung R70 A007 laptop. The hardware is: - CPU: Core 2 Duo T7500 - Chipset: Intel 965PM Express ICH8M - RAM: 4GB Kingston (non native modules) - Video: NVIDIA GeForce 8600M GS 256MB - Sound: Realtek ALC262 - Lan: Generic Marvell Yukon 88E8055 PCI-E Gigabit - Wi-fi: Intel PRO/Wireless 3945ABG All hardware works fine except wi-fi and cardreader. The problem is that the system turns the laptop off if both the cores are loaded more than 60% for a long time. Of course the laptop is quite hot, but that's its normal condition under heavy load. Previously, I used Windows Vista and it never shut down even if both the cores were 100% loaded for hours (gaming). Does anybody know how to avoid that? Is it possible to disable automatic turning off on overheating or increase the temperature limit? Thank you in advance. P.S. Yesterday, one of my collegues confirmed he has the same issue with his PC (not laptop) with iDeneb 1.4. Link to comment https://www.insanelymac.com/forum/topic/172594-leopard-turns-off-laptop-due-to-overheating-how-to-avoid/ Share on other sites More sharing options...
Synaesthesia Posted June 28, 2009 Share Posted June 28, 2009 Install speedstep kext - http://code.google.com/p/xnu-speedstep/ Link to comment https://www.insanelymac.com/forum/topic/172594-leopard-turns-off-laptop-due-to-overheating-how-to-avoid/#findComment-1187489 Share on other sites More sharing options...
Izwerg Posted June 28, 2009 Author Share Posted June 28, 2009 Thanks, but I've installed it previously and it doesn't seem to have any effect. However, I've just downloaded and installed the latest version of IntelEnhancedSpeedStep.kext v1.4.9 (via kext helper) and tuxx's SpeedStep GUI (original) by the link you provided. After reboot, I ran SpeedStep GUI and see my current CPU clock. When I switch from Auto to Custom Clock and set minimal clock (I have 2002, 1456 and 1092 values) and then run an application which loads CPU, the clock is automatically increased to maximum value, but SpeedStep GUI is up-and-running in "Custom Clock" mode. I've also decreased CPU Voltage to minimum value and set Max Threshold and Min Threshold to 0 in preferences (I have no idea what tresholds they are). I don't see any effect from the changes I've made. What needs to be done to make IntelEnhancedSpeedStep.kext work? Link to comment https://www.insanelymac.com/forum/topic/172594-leopard-turns-off-laptop-due-to-overheating-how-to-avoid/#findComment-1187712 Share on other sites More sharing options...
ihavearedcouch Posted June 28, 2009 Share Posted June 28, 2009 idk what else to say that i think theres dust stuffed between your fan and your laptops heatsink. my dell b130 would overheat as well and then shut off, i found that after opening it up there was a thick pad of dust stuck between my heatsink and the edge of the fan (its a directional right angle fan), after pulling it out, the air was able to pass through the heatsink again and the temperature has been much better now. if you've used your laptop on beds or cloth surfaces before this might be the issure, if your warranty has expired and you're confident about taking things apart and putting them back together you should give it a try. Link to comment https://www.insanelymac.com/forum/topic/172594-leopard-turns-off-laptop-due-to-overheating-how-to-avoid/#findComment-1187904 Share on other sites More sharing options...
Izwerg Posted June 29, 2009 Author Share Posted June 29, 2009 Thanks. However, I don't think that dust is the reason, but I'll check it. It looks like native Mac hardware is not so hot under maximum load and Apple set temperature limit to a value which is far from maximum Intel C2D overheating limit. I'd say what is typical for non-Mac is death for Mac :-) Windows Vista works fine on the same hardware. Under long extreme load, the hardware gets very hot and becomes slow, but not under Leopard which simply turns off the hardware. Each new day with hackintosh makes me think about purchasing native Mac more and more :-) Link to comment https://www.insanelymac.com/forum/topic/172594-leopard-turns-off-laptop-due-to-overheating-how-to-avoid/#findComment-1188390 Share on other sites More sharing options...
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