08-21-2010 03:00 AM - edited 08-21-2010 03:01 AM
I currently own a brand new i7-620UM based U160, and it gives me some headaches about performance.
After wondering why I've never come any close to the 2.13 GHz maximum clock rate of the cpu, I have found evidence that there's more people than just me suffering from this. There's at least some tests between U160 with i5-520UM and the equal model from Acer (1830T). The latter beats the U160 by at least one order of magnitude when it comes to cpu performance (especially the Windows 7 performance index).
To me it seems that Lenovo has somehome screwed up with Turbo Boost at least on the U160 with i5-520UM and the i7-620UM. I have recently opened a case with Lenovo, but no response so far (no offense, it's only been open for a day or two).
I wonder if anyone here's been making similar experience. What have your steps been so far to remedy this?
08-21-2010 06:57 AM
take a look at this thread.
08-21-2010 07:48 AM
first, thank you for the information.
The U160 bios does not come with a switch to turn Turbo Boost on or off. So it's always turned on.
I've been able to see with Intel's TB monitor gadget that Turbo Boost is indeed working, but the clock speed it reaches at max is totally unsatisfying. So far I have not found a way to bring the cpu to more than about 1.6 GHz, whereas that chip's spec says it will reach 2.13 GHz. Running at a maximum of only 75% of this cpu's specified capabilities is not an option for me. That's not what I've chosen this cpu for (no offense).
08-22-2010 05:46 AM
08-25-2010 12:40 PM
The U160 performance issues were also mentioned in Notebookcheck's review.
Steffan: when you get a response from Lenovo, please do us all a favor and post it here.
Has anyone out there been able to get their U160 to the full turbo clock speed?
08-25-2010 03:46 PM
The U160 has been removed from Lenovo's website (US).
I've not tested my clock speeds but I have had issues with USB devices when resuming from sleep.
Perhaps there are some issues with the U160? That being said, I'm very happy with mine apart from the above thread.
09-05-2010 06:49 AM
Hi I am an owner of a U160 with core i7. The broken Turbo Boost happens to me, too.
Last time I tried some things with Win 7 (for normal I use Linux) I take a closer look with CPU Z 1.55. It looks like an invertet Turbo Boost! When the U160 looks IDLE the CPU freq is increasing up to 2.1 GHz and when I start a benchmark or stress test, the system speed goes down to minimum freq.
I there someone who can try it, too?
09-07-2010 10:48 AM
Thanks for noting this. A limited number of U160 systems shipped with a configuration error at the system board level that affects the proper function of the turbo boost function. Lenovo has notfied resellers and is working to ensure that affected inventory is taken care of.
We are finalizing our plan to aid customers who have an affected system and I expect to be able to update you on this by end of Thursday this week.
09-07-2010 02:47 PM
Appreciate the update, and the honesty. Just a personal note - if there will be a BIOS/firmware solution for this at some point it would be great if we have access to do that ourselves. For some of us, it's not so easy to return our laptops for service.