Mac OS X on x86 Hardware 2008–2024 Technical Archive
InfiniteMac OSx86 › Snow Leopard 10.6 › Very hot CPU under snow leo at EP45-UD3P rev1
15,662 reads · 2009-09-08 – 2009-12-14
Report Snow Leopard 10.6 DSDT Gigabyte G31M / P35

Very hot CPU under snow leo at EP45-UD3P rev1

Have You noticed any difference of temperature between 10.5.x and 10.6 ? I have UD3P rev 1.0 bios 10e, (dsdt.aml, fakesmc, LegacyHDA, OpenHaltRestart, PlatformUUID and 32bit legacyIOAHCIBlockStorage) and my cpu is up to 75C idle when in…

Primary Author
@Obecny Published 2009-09-08
Collection
Snow Leopard 10.6
Archival Footprint
15,662 historical reads · 10 curated field notes (from 14 dispatches) · 2009-09-08 – 2009-12-14
Credited Voices (7)
@x986123 (4)@thorazine74 (3)@Obecny (2)@Snow (2)@SaCleoCheater@Ianxxx@p2im0

Have You noticed any difference of temperature between 10.5.x and 10.6 ?
I have UD3P rev 1.0 bios 10e, (dsdt.aml, fakesmc, LegacyHDA, OpenHaltRestart, PlatformUUID and 32bit legacyIOAHCIBlockStorage) and my cpu is up to 75C idle when in 10.5.x idle temp is about 48C
Where could be a problem ?

Author Updates & Technical Revisions

Follow-up dispatches by @Obecny

Author Update #1 @Obecny 2009-09-09

Thanks, NullCPU... resolved my problem, now idle temp is back to 48C with passive cooler, thanks again

Synthesized Community Field Notes

10 technical responses curated from 14 original dispatches

Field Note #1 @x986123 2009-09-08

How are you checking the temperature? Also try that this NULLCPUPM (heli acal.net/~solar/mac/NullCPUPowerManagement.kext_for_snow_64.tar)

Field Note #2 @Snow 2009-09-09

These are my temps measured with CPU-i

In Leo I would idle in low 30's. Speedstep seems to be working but Voltage stays at max.

Idling @ 75° is not healthy at al and should be taking care of ASAP. A big jump like that makes me think it's more hardware related. You haven't changed anything since installing SL?

Field Note #3 @x986123 2009-09-09 ↳ Re: @Snow
@SnowThese are my temps measured with CPU-i In Leo I would idle in low 30's. Speedstep seems to be working but Voltage stays at max. Idling @ 75° is not healthy at al and should be taking care of ASAP. A big jump like that makes me think it's more hardware related. You haven't changed anything since installing SL?

Where did you get CPU-i?

Field Note #4 @thorazine74 2009-09-10 ↳ Re: @Snow
@SnowRussian site

Can you post a link please? Google finds nothing.
You can also measure core temps with Hardware Monitor (bre sink.com/osx/HardwareMonitor.html) but its not free and it seems much more limited than this one...

Field Note #5 @SaCleoCheater 2009-09-10

You people are lucky, Mine at idle is about 72-83ºC.

Yet again it is a laptop so it's bound to be a little toasty..

Field Note #6 @thorazine74 2009-09-11

Found it! (google can find anything, if you know how to search for it...)
appl elife.ru/topic/16509-cpu-i/ (Google Translation ↗)

EDIT: it needs a cpui.kext not included, can be found here (209.85.229.132/translate_c?hl=en&sl=ru&tl=en&u=http://webfile.ru/3850989&prev=hp&rurl=translate.google.com&usg=ALkJrhhhvXpODDUGiCg3gee6k-abBlfi6g)

Pretty cool utility, much better than Hardware Monitor! I have SpeedStep working out-of-the-box? I got no clue how...

Field Note #8 @Ianxxx 2009-09-13

Can't download the kext the link doesn't seem to work could you put it on rapidshare or something

Field Note #9 @thorazine74 2009-09-16

rapid share.com/files/280779212/CPUi.kext.zip.html

Field Note #10 @p2im0 2009-12-14

CPU-i 1.0.3b1

Updated link for version 1.0.3b1, includes kext and package.

multi upload.com/CO8GRV3XQP

Corroborated & Participated: @Snow @x986123
Sources & Contributor Provenance (7 credited usernames · Thread #3987)
UsernameDossier ContributionDispatchesActive Window
@x986123Core Contributor42009-09-08 → 2009-09-11
@thorazine74Core Contributor32009-09-10 → 2009-09-16
@ObecnyPrimary Author22009-09-08 → 2009-09-09
@SnowContributor22009-09-09 → 2009-09-10
@SaCleoCheaterContributor12009-09-10
@IanxxxContributor12009-09-13
@p2im0Contributor12009-12-14