Naish84 Posted April 9, 2012 Share Posted April 9, 2012 Hello everyone, one week ago i installed lion on my pc: - asus p8p67 evo - i5 2500k @4.2ghz - 8gb ddr3 - geforce gtx 460 i have a really strange (minor) issue: my cpu goes to 3300mhz (33x multiplier) instead of 4200mhz (42x multiplier). in the bios everything if fine and in windows is running at 4200mhz. in lion the speed stepping is working, even the energy saver features (i can go in stop). i monitor my cpu with smc monitor. another really strange thing is that one time out of 10 boots the cpu goes to 4200mhz... i really can't understand why. have you got any clue? is this happened to someone else? thank you in advance, and sorry for my english geek bench confirms what i see in smc monitor: 3300mhz = score 9800 4200mhz = score 12000 Link to comment https://www.insanelymac.com/forum/topic/277994-cpu-multiplier-issue-turbo-mode/ Share on other sites More sharing options...
magnifico Posted April 9, 2012 Share Posted April 9, 2012 Which smbios you use Link to comment https://www.insanelymac.com/forum/topic/277994-cpu-multiplier-issue-turbo-mode/#findComment-1812469 Share on other sites More sharing options...
Naish84 Posted April 10, 2012 Author Share Posted April 10, 2012 Which smbios you use well, i checked and i was using a mac pro 2008 smbios! now i am rebooting with the correct one (that should be the last iMac bios, which is sandy bride). i will let you know if that worked! thank you nothing to do... i rebooted and i am at 3300mhz with the default smbios of the last iMac i added this string: <key>SMmaximalclock</key> <string>4100</string> but it only get better "mac info" nothing more Link to comment https://www.insanelymac.com/forum/topic/277994-cpu-multiplier-issue-turbo-mode/#findComment-1812551 Share on other sites More sharing options...
magnifico Posted April 10, 2012 Share Posted April 10, 2012 listen me..but you score geekbench to 4200 is good , wich is your problem? Link to comment https://www.insanelymac.com/forum/topic/277994-cpu-multiplier-issue-turbo-mode/#findComment-1812558 Share on other sites More sharing options...
Naish84 Posted April 10, 2012 Author Share Posted April 10, 2012 listen me..but you score geekbench to 4200 is good , wich is your problem? dato che anche te sei italiano, ti scrivo in italiano allora, il punteggio è buono e rispecchia il fatto che tutto sia installato correttamente, non mi lamento di quello. il problema è uno ed è che 9 volte su 10 si avvia col moltiplicatore a 33 e non a 42 come dovrebbe (o quanto meno non funziona il turbo), ho usato il punteggio di geekbench solo per confermare quanto rilevato da smc monitor (che mi rileva la freq della cpu in real time). ho visto che potrebbe essere un problema dello speedstep (correttamente abilitato da bios), come posso impostare manualmente i valore dei p-states? adesso viaggio a 16//33 e, quel famoso riavvio ogni 10, 16//42, il secondo sarebbe perfetto! grazie di tutto p.s: for the mods, maybe is better to move this thread in the italian section. sorry Link to comment https://www.insanelymac.com/forum/topic/277994-cpu-multiplier-issue-turbo-mode/#findComment-1812691 Share on other sites More sharing options...
magnifico Posted April 10, 2012 Share Posted April 10, 2012 Ok...open topic in italian section Link to comment https://www.insanelymac.com/forum/topic/277994-cpu-multiplier-issue-turbo-mode/#findComment-1812722 Share on other sites More sharing options...
alaskantraveler Posted April 12, 2012 Share Posted April 12, 2012 how is your org.chameleon.Boot.plist file set up? I have found that you need to put the busratio in the kernel flags <key>kernel flags</key> <string> -v cpus=1 busratio=15</string> instead of as one of the arguments like <key>busratio</key> <string>15</string>. Link to comment https://www.insanelymac.com/forum/topic/277994-cpu-multiplier-issue-turbo-mode/#findComment-1813020 Share on other sites More sharing options...
Naish84 Posted April 13, 2012 Author Share Posted April 13, 2012 I have solved the trouble by disabling EIST in bios settings! Link to comment https://www.insanelymac.com/forum/topic/277994-cpu-multiplier-issue-turbo-mode/#findComment-1813404 Share on other sites More sharing options...
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