Thread: Need help to get all cores on i7 740qm going

Hello every one,

I need your help in getting all cores on my i7 740 qm going. I have a Toshiba laptop with, well you guessed it, an i7 740 QM processor, am running OSX (retail) Lion, kernel 10.7.0. when I start up using cpus=4, or 8 I do see message say something about UNSynchronized TSC on CPU1,3,5 (it changes depending on how many cpus I specify in the boot argument), to find a fix I have tried VoodooTscSync - including the changes they recommended, did not do anything for me. Please if anyone can help me figure out this one, I just was not sure which all information may help you guys fix my problem, just ask and I will post it.

Thanks

Originally Posted by hamood

Hello every one,

I need your help in getting all cores on my i7 740 qm going. I have a Toshiba laptop with, well you guessed it, an i7 740 QM processor, am running OSX (retail) Lion, kernel 10.7.0. when I start up using cpus=4, or 8 I do see message say something about UNSynchronized TSC on CPU1,3,5 (it changes depending on how many cpus I specify in the boot argument), to find a fix I have tried VoodooTscSync - including the changes they recommended, did not do anything for me. Please if anyone can help me figure out this one, I just was not sure which all information may help you guys fix my problem, just ask and I will post it.

Thanks

Don`t use VoodooTSCSync, only a few people with Core2Duo processors need to use this kext...

You have only one (physical) CPU...

Your physical CPU have 4 cores and also have Hyper Threading technology (each core emulates a new one)...

This let you with 8 Threads....

Resuming > 1 CPU with 4 Cores and 8 Threads > Intel® Core

Go in Application / Utilities / Activity Monitor and double click "CPU usage"...

Tell me if you can see your 8 Threads...

hey Kynnder,

Thank you for your response, I have looked in the activity monitor utility and it does show the 8 CPU's (Threads), but only one of them (The top one) shows any activity. I have tried some very CPU intensive appliations simultaneously to see if the other cores would kick in, but still only the one shows any activity. Surprisinglt if I look in the System information utility, it correctly identifies my CPU as i7 740qm and even shows the number of cores to be 4.


Thanks

same problem for me on my 720qm....

SOLUTION HERE